./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:33:28,933 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:33:28,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:33:28,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:33:28,999 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:33:29,025 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:33:29,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:33:29,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:33:29,027 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:33:29,030 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:33:29,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:33:29,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:33:29,031 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:33:29,032 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:33:29,033 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:33:29,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:33:29,033 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:33:29,033 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:33:29,033 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:33:29,034 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:33:29,034 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:33:29,034 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:33:29,034 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:33:29,035 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:33:29,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:33:29,035 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:33:29,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:33:29,036 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:33:29,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:33:29,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:33:29,037 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:33:29,037 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:33:29,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:33:29,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:33:29,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:33:29,038 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:33:29,038 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:33:29,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:33:29,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:33:29,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:33:29,039 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:33:29,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:33:29,039 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:33:29,040 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:33:29,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:33:29,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:33:29,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:33:29,280 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:33:29,280 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:33:29,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:33:30,324 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:33:30,520 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:33:30,521 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:33:30,533 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd730334/e82fa39f68d84abda5bd84fe753db93b/FLAG799ca650f [2024-06-04 15:33:30,545 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd730334/e82fa39f68d84abda5bd84fe753db93b [2024-06-04 15:33:30,547 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:33:30,548 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:33:30,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-04 15:33:30,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:33:30,706 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:33:30,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:33:30,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:33:30,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:33:30,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:33:30" (1/2) ... [2024-06-04 15:33:30,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8d83cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:33:30, skipping insertion in model container [2024-06-04 15:33:30,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:33:30" (1/2) ... [2024-06-04 15:33:30,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c84f462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:33:30, skipping insertion in model container [2024-06-04 15:33:30,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:33:30" (2/2) ... [2024-06-04 15:33:30,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8d83cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:30, skipping insertion in model container [2024-06-04 15:33:30,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:33:30" (2/2) ... [2024-06-04 15:33:30,715 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:33:30,807 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:33:30,809 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-04 15:33:30,809 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-04 15:33:30,809 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-04 15:33:30,809 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:33:30,809 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-04 15:33:30,850 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:33:31,107 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:33:31,119 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:33:31,212 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:33:31,244 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:33:31,245 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31 WrapperNode [2024-06-04 15:33:31,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:33:31,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:33:31,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:33:31,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:33:31,252 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 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,278 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 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,312 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-04 15:33:31,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:33:31,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:33:31,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:33:31,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:33:31,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,353 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 15:33:31,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,367 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,379 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:33:31,388 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:33:31,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:33:31,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:33:31,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (1/1) ... [2024-06-04 15:33:31,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:33:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:33:31,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 15:33:31,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 15:33:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:33:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:33:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:33:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:33:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:33:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:33:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:33:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:33:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:33:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:33:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:33:31,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:33:31,455 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:33:31,583 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:33:31,585 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:33:31,845 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:33:31,845 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:33:31,958 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:33:31,958 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:33:31,958 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:33:31 BoogieIcfgContainer [2024-06-04 15:33:31,958 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:33:31,960 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:33:31,960 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:33:31,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:33:31,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:33:30" (1/4) ... [2024-06-04 15:33:31,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4343d27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:33:31, skipping insertion in model container [2024-06-04 15:33:31,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:33:30" (2/4) ... [2024-06-04 15:33:31,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4343d27d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:33:31, skipping insertion in model container [2024-06-04 15:33:31,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:31" (3/4) ... [2024-06-04 15:33:31,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4343d27d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:33:31, skipping insertion in model container [2024-06-04 15:33:31,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:33:31" (4/4) ... [2024-06-04 15:33:31,965 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:33:31,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:33:31,977 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:33:31,977 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:33:32,016 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:33:32,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 15:33:32,064 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 15:33:32,064 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:33:32,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:33:32,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 15:33:32,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 15:33:32,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:33:32,079 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;@3675b1e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:33:32,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:33:32,082 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:33:32,082 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:33:32,082 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:33:32,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:32,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:33:32,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:32,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1642982905, now seen corresponding path program 1 times [2024-06-04 15:33:32,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:32,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266372890] [2024-06-04 15:33:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:33,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266372890] [2024-06-04 15:33:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266372890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:33,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:33,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:33:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606865740] [2024-06-04 15:33:33,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:33:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:33:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:33:33,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-04 15:33:33,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:33,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:33,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-04 15:33:33,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:33,450 INFO L124 PetriNetUnfolderBase]: 942/1466 cut-off events. [2024-06-04 15:33:33,450 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-04 15:33:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2984 conditions, 1466 events. 942/1466 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7305 event pairs, 546 based on Foata normal form. 2/1428 useless extension candidates. Maximal degree in co-relation 2969. Up to 1428 conditions per place. [2024-06-04 15:33:33,463 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-04 15:33:33,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 177 flow [2024-06-04 15:33:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:33:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:33:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-04 15:33:33,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-04 15:33:33,473 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 79 transitions. [2024-06-04 15:33:33,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 177 flow [2024-06-04 15:33:33,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:33,479 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 15:33:33,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 15:33:33,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 15:33:33,483 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 15:33:33,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:33,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:33,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:33,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:33:33,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:33,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1641423846, now seen corresponding path program 1 times [2024-06-04 15:33:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:33,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174399229] [2024-06-04 15:33:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:33,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:34,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:34,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174399229] [2024-06-04 15:33:34,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174399229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:34,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:34,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:33:34,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468810497] [2024-06-04 15:33:34,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:34,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:33:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:34,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:33:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:33:34,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 15:33:34,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:34,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:34,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 15:33:34,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:34,304 INFO L124 PetriNetUnfolderBase]: 1338/2028 cut-off events. [2024-06-04 15:33:34,305 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-06-04 15:33:34,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4664 conditions, 2028 events. 1338/2028 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9613 event pairs, 712 based on Foata normal form. 6/2033 useless extension candidates. Maximal degree in co-relation 4649. Up to 1969 conditions per place. [2024-06-04 15:33:34,315 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-04 15:33:34,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 264 flow [2024-06-04 15:33:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:33:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:33:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-04 15:33:34,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 15:33:34,319 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-04 15:33:34,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 264 flow [2024-06-04 15:33:34,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:33:34,322 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-04 15:33:34,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-04 15:33:34,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-04 15:33:34,323 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-04 15:33:34,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:34,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:34,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:34,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:33:34,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:34,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash 928727222, now seen corresponding path program 1 times [2024-06-04 15:33:34,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:34,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872603098] [2024-06-04 15:33:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:35,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872603098] [2024-06-04 15:33:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872603098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:35,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:33:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859493707] [2024-06-04 15:33:35,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:33:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:33:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:33:35,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-04 15:33:35,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:35,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:35,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-04 15:33:35,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:35,451 INFO L124 PetriNetUnfolderBase]: 980/1540 cut-off events. [2024-06-04 15:33:35,451 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2024-06-04 15:33:35,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 1540 events. 980/1540 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7570 event pairs, 562 based on Foata normal form. 3/1499 useless extension candidates. Maximal degree in co-relation 3906. Up to 1473 conditions per place. [2024-06-04 15:33:35,458 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 41 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-04 15:33:35,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 310 flow [2024-06-04 15:33:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:33:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:33:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-04 15:33:35,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-06-04 15:33:35,460 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 106 transitions. [2024-06-04 15:33:35,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 310 flow [2024-06-04 15:33:35,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 308 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 15:33:35,462 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 223 flow [2024-06-04 15:33:35,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-04 15:33:35,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-04 15:33:35,463 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 223 flow [2024-06-04 15:33:35,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:35,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:35,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:35,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:33:35,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:35,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2104202332, now seen corresponding path program 1 times [2024-06-04 15:33:35,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:35,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249236097] [2024-06-04 15:33:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:35,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:36,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:36,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249236097] [2024-06-04 15:33:36,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249236097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:36,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:36,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:33:36,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040843608] [2024-06-04 15:33:36,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:36,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:33:36,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:33:36,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:33:36,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 15:33:36,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:36,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:36,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 15:33:36,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:36,735 INFO L124 PetriNetUnfolderBase]: 1323/2005 cut-off events. [2024-06-04 15:33:36,736 INFO L125 PetriNetUnfolderBase]: For 1874/1874 co-relation queries the response was YES. [2024-06-04 15:33:36,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5797 conditions, 2005 events. 1323/2005 cut-off events. For 1874/1874 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9455 event pairs, 467 based on Foata normal form. 6/2010 useless extension candidates. Maximal degree in co-relation 5774. Up to 1916 conditions per place. [2024-06-04 15:33:36,747 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-04 15:33:36,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 451 flow [2024-06-04 15:33:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-04 15:33:36,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-04 15:33:36,749 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 223 flow. Second operand 6 states and 133 transitions. [2024-06-04 15:33:36,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 451 flow [2024-06-04 15:33:36,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 438 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 15:33:36,752 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-04 15:33:36,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-04 15:33:36,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-04 15:33:36,753 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-04 15:33:36,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:36,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:36,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:36,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:33:36,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:36,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:36,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1239370335, now seen corresponding path program 1 times [2024-06-04 15:33:36,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:36,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123999052] [2024-06-04 15:33:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:36,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:37,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:37,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123999052] [2024-06-04 15:33:37,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123999052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:37,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:37,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:37,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218974899] [2024-06-04 15:33:37,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:37,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:37,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:37,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:37,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:37,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:37,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:37,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:37,777 INFO L124 PetriNetUnfolderBase]: 1378/2096 cut-off events. [2024-06-04 15:33:37,777 INFO L125 PetriNetUnfolderBase]: For 3089/3089 co-relation queries the response was YES. [2024-06-04 15:33:37,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6535 conditions, 2096 events. 1378/2096 cut-off events. For 3089/3089 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10034 event pairs, 510 based on Foata normal form. 6/2100 useless extension candidates. Maximal degree in co-relation 6510. Up to 1942 conditions per place. [2024-06-04 15:33:37,790 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 60 selfloop transitions, 18 changer transitions 0/83 dead transitions. [2024-06-04 15:33:37,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 549 flow [2024-06-04 15:33:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 15:33:37,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:33:37,792 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 7 states and 133 transitions. [2024-06-04 15:33:37,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 549 flow [2024-06-04 15:33:37,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 522 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:37,796 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 358 flow [2024-06-04 15:33:37,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=358, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-04 15:33:37,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-04 15:33:37,797 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 358 flow [2024-06-04 15:33:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:37,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:37,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:33:37,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:37,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1568031445, now seen corresponding path program 1 times [2024-06-04 15:33:37,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:37,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720312711] [2024-06-04 15:33:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:37,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:38,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:38,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720312711] [2024-06-04 15:33:38,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720312711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:38,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:38,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:38,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013405341] [2024-06-04 15:33:38,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:38,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:38,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:38,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:38,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:38,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:38,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:38,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:38,741 INFO L124 PetriNetUnfolderBase]: 1412/2165 cut-off events. [2024-06-04 15:33:38,742 INFO L125 PetriNetUnfolderBase]: For 4843/4843 co-relation queries the response was YES. [2024-06-04 15:33:38,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7613 conditions, 2165 events. 1412/2165 cut-off events. For 4843/4843 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10477 event pairs, 555 based on Foata normal form. 4/2168 useless extension candidates. Maximal degree in co-relation 7584. Up to 2069 conditions per place. [2024-06-04 15:33:38,755 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 70 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2024-06-04 15:33:38,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 645 flow [2024-06-04 15:33:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 15:33:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-04 15:33:38,757 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 358 flow. Second operand 7 states and 135 transitions. [2024-06-04 15:33:38,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 645 flow [2024-06-04 15:33:38,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 629 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-04 15:33:38,764 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 456 flow [2024-06-04 15:33:38,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-04 15:33:38,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-04 15:33:38,765 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 456 flow [2024-06-04 15:33:38,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:38,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:38,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:38,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:33:38,766 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:38,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash 233980617, now seen corresponding path program 2 times [2024-06-04 15:33:38,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:38,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827260143] [2024-06-04 15:33:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:38,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:39,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:39,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827260143] [2024-06-04 15:33:39,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827260143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:39,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:39,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:39,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694393651] [2024-06-04 15:33:39,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:39,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:39,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:39,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:39,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:39,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:39,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:39,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:39,732 INFO L124 PetriNetUnfolderBase]: 1434/2200 cut-off events. [2024-06-04 15:33:39,732 INFO L125 PetriNetUnfolderBase]: For 6348/6348 co-relation queries the response was YES. [2024-06-04 15:33:39,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8094 conditions, 2200 events. 1434/2200 cut-off events. For 6348/6348 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10662 event pairs, 534 based on Foata normal form. 4/2203 useless extension candidates. Maximal degree in co-relation 8061. Up to 2083 conditions per place. [2024-06-04 15:33:39,746 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-04 15:33:39,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 708 flow [2024-06-04 15:33:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-04 15:33:39,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-04 15:33:39,747 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 456 flow. Second operand 6 states and 117 transitions. [2024-06-04 15:33:39,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 708 flow [2024-06-04 15:33:39,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 676 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:39,753 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 506 flow [2024-06-04 15:33:39,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=506, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-04 15:33:39,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-04 15:33:39,754 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 506 flow [2024-06-04 15:33:39,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:39,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:39,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:39,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:33:39,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:39,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -846301803, now seen corresponding path program 3 times [2024-06-04 15:33:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656577215] [2024-06-04 15:33:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656577215] [2024-06-04 15:33:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656577215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:40,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:40,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546295214] [2024-06-04 15:33:40,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:40,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:40,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:40,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:40,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:40,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:40,759 INFO L124 PetriNetUnfolderBase]: 1408/2164 cut-off events. [2024-06-04 15:33:40,759 INFO L125 PetriNetUnfolderBase]: For 7786/7786 co-relation queries the response was YES. [2024-06-04 15:33:40,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8155 conditions, 2164 events. 1408/2164 cut-off events. For 7786/7786 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10465 event pairs, 542 based on Foata normal form. 8/2169 useless extension candidates. Maximal degree in co-relation 8121. Up to 1948 conditions per place. [2024-06-04 15:33:40,771 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 25 changer transitions 0/92 dead transitions. [2024-06-04 15:33:40,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 745 flow [2024-06-04 15:33:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-04 15:33:40,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-04 15:33:40,775 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 506 flow. Second operand 6 states and 119 transitions. [2024-06-04 15:33:40,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 745 flow [2024-06-04 15:33:40,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 693 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:40,782 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 545 flow [2024-06-04 15:33:40,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=545, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-04 15:33:40,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-04 15:33:40,783 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 545 flow [2024-06-04 15:33:40,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:40,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:40,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:40,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:33:40,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:40,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash 234226695, now seen corresponding path program 1 times [2024-06-04 15:33:40,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:40,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316938620] [2024-06-04 15:33:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:40,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:41,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:41,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316938620] [2024-06-04 15:33:41,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316938620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:41,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327112469] [2024-06-04 15:33:41,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:41,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:41,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:41,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:41,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:41,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:41,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:42,024 INFO L124 PetriNetUnfolderBase]: 1425/2189 cut-off events. [2024-06-04 15:33:42,024 INFO L125 PetriNetUnfolderBase]: For 7708/7708 co-relation queries the response was YES. [2024-06-04 15:33:42,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8306 conditions, 2189 events. 1425/2189 cut-off events. For 7708/7708 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10593 event pairs, 501 based on Foata normal form. 6/2192 useless extension candidates. Maximal degree in co-relation 8270. Up to 1946 conditions per place. [2024-06-04 15:33:42,041 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 64 selfloop transitions, 32 changer transitions 0/101 dead transitions. [2024-06-04 15:33:42,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 101 transitions, 827 flow [2024-06-04 15:33:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:33:42,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-04 15:33:42,042 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 545 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:33:42,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 101 transitions, 827 flow [2024-06-04 15:33:42,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 789 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:42,052 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 619 flow [2024-06-04 15:33:42,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=619, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-04 15:33:42,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-04 15:33:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 619 flow [2024-06-04 15:33:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:42,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:42,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:42,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:33:42,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:42,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1328905600, now seen corresponding path program 1 times [2024-06-04 15:33:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:42,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982229451] [2024-06-04 15:33:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:42,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:42,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:42,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982229451] [2024-06-04 15:33:42,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982229451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:42,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:42,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:42,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897388885] [2024-06-04 15:33:42,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:42,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:42,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:43,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:43,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 619 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:43,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:43,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:43,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:43,484 INFO L124 PetriNetUnfolderBase]: 1509/2329 cut-off events. [2024-06-04 15:33:43,484 INFO L125 PetriNetUnfolderBase]: For 10653/10653 co-relation queries the response was YES. [2024-06-04 15:33:43,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9520 conditions, 2329 events. 1509/2329 cut-off events. For 10653/10653 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11515 event pairs, 477 based on Foata normal form. 28/2354 useless extension candidates. Maximal degree in co-relation 9483. Up to 1930 conditions per place. [2024-06-04 15:33:43,497 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 73 selfloop transitions, 35 changer transitions 0/113 dead transitions. [2024-06-04 15:33:43,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 113 transitions, 959 flow [2024-06-04 15:33:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 15:33:43,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:33:43,499 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 619 flow. Second operand 8 states and 160 transitions. [2024-06-04 15:33:43,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 113 transitions, 959 flow [2024-06-04 15:33:43,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 113 transitions, 883 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:43,511 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 655 flow [2024-06-04 15:33:43,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=655, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-04 15:33:43,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-04 15:33:43,514 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 655 flow [2024-06-04 15:33:43,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:43,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:43,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:43,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:33:43,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:43,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2129360744, now seen corresponding path program 1 times [2024-06-04 15:33:43,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:43,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431092065] [2024-06-04 15:33:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:43,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431092065] [2024-06-04 15:33:44,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431092065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:44,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:44,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788210922] [2024-06-04 15:33:44,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:44,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:44,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:44,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:44,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:44,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:44,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:44,868 INFO L124 PetriNetUnfolderBase]: 1504/2331 cut-off events. [2024-06-04 15:33:44,869 INFO L125 PetriNetUnfolderBase]: For 12036/12036 co-relation queries the response was YES. [2024-06-04 15:33:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9992 conditions, 2331 events. 1504/2331 cut-off events. For 12036/12036 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11551 event pairs, 484 based on Foata normal form. 2/2332 useless extension candidates. Maximal degree in co-relation 9954. Up to 2209 conditions per place. [2024-06-04 15:33:44,882 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2024-06-04 15:33:44,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 961 flow [2024-06-04 15:33:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 15:33:44,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-04 15:33:44,884 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 655 flow. Second operand 7 states and 136 transitions. [2024-06-04 15:33:44,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 961 flow [2024-06-04 15:33:44,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 885 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:44,896 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 655 flow [2024-06-04 15:33:44,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-04 15:33:44,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-04 15:33:44,897 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 655 flow [2024-06-04 15:33:44,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:44,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:44,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:44,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:33:44,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:44,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1546938748, now seen corresponding path program 1 times [2024-06-04 15:33:44,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:44,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030839021] [2024-06-04 15:33:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:44,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030839021] [2024-06-04 15:33:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030839021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:45,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:45,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:45,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853043376] [2024-06-04 15:33:45,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:45,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:45,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:45,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:45,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:45,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:45,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:45,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:46,188 INFO L124 PetriNetUnfolderBase]: 1515/2343 cut-off events. [2024-06-04 15:33:46,188 INFO L125 PetriNetUnfolderBase]: For 13892/13892 co-relation queries the response was YES. [2024-06-04 15:33:46,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10275 conditions, 2343 events. 1515/2343 cut-off events. For 13892/13892 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11610 event pairs, 492 based on Foata normal form. 2/2342 useless extension candidates. Maximal degree in co-relation 10236. Up to 2173 conditions per place. [2024-06-04 15:33:46,203 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 88 selfloop transitions, 26 changer transitions 0/119 dead transitions. [2024-06-04 15:33:46,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 119 transitions, 1061 flow [2024-06-04 15:33:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:33:46,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-04 15:33:46,205 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 655 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:33:46,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 119 transitions, 1061 flow [2024-06-04 15:33:46,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1009 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:46,218 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 805 flow [2024-06-04 15:33:46,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-04 15:33:46,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-04 15:33:46,219 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 805 flow [2024-06-04 15:33:46,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:46,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:46,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:46,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:33:46,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:46,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2027210144, now seen corresponding path program 2 times [2024-06-04 15:33:46,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:46,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944665041] [2024-06-04 15:33:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:46,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:46,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:46,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944665041] [2024-06-04 15:33:46,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944665041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:46,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:46,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:46,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473022809] [2024-06-04 15:33:46,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:47,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:47,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 805 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:47,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:47,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:47,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:47,479 INFO L124 PetriNetUnfolderBase]: 1510/2336 cut-off events. [2024-06-04 15:33:47,479 INFO L125 PetriNetUnfolderBase]: For 16321/16321 co-relation queries the response was YES. [2024-06-04 15:33:47,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10799 conditions, 2336 events. 1510/2336 cut-off events. For 16321/16321 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11582 event pairs, 492 based on Foata normal form. 2/2335 useless extension candidates. Maximal degree in co-relation 10757. Up to 2139 conditions per place. [2024-06-04 15:33:47,494 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 30 changer transitions 0/124 dead transitions. [2024-06-04 15:33:47,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 124 transitions, 1159 flow [2024-06-04 15:33:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:33:47,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-04 15:33:47,495 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 805 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:33:47,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 124 transitions, 1159 flow [2024-06-04 15:33:47,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 124 transitions, 1084 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:47,510 INFO L231 Difference]: Finished difference. Result has 91 places, 104 transitions, 859 flow [2024-06-04 15:33:47,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=859, PETRI_PLACES=91, PETRI_TRANSITIONS=104} [2024-06-04 15:33:47,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-04 15:33:47,511 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 104 transitions, 859 flow [2024-06-04 15:33:47,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:47,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:47,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:47,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:33:47,512 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:47,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1219957503, now seen corresponding path program 1 times [2024-06-04 15:33:47,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:47,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488085003] [2024-06-04 15:33:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488085003] [2024-06-04 15:33:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488085003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:48,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:48,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146701299] [2024-06-04 15:33:48,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:48,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:48,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:48,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 104 transitions, 859 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:48,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:48,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:48,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:48,859 INFO L124 PetriNetUnfolderBase]: 1505/2321 cut-off events. [2024-06-04 15:33:48,859 INFO L125 PetriNetUnfolderBase]: For 18215/18215 co-relation queries the response was YES. [2024-06-04 15:33:48,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11095 conditions, 2321 events. 1505/2321 cut-off events. For 18215/18215 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11469 event pairs, 474 based on Foata normal form. 2/2318 useless extension candidates. Maximal degree in co-relation 11051. Up to 2069 conditions per place. [2024-06-04 15:33:48,874 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 40 changer transitions 0/123 dead transitions. [2024-06-04 15:33:48,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 123 transitions, 1180 flow [2024-06-04 15:33:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-04 15:33:48,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:33:48,876 INFO L175 Difference]: Start difference. First operand has 91 places, 104 transitions, 859 flow. Second operand 6 states and 120 transitions. [2024-06-04 15:33:48,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 123 transitions, 1180 flow [2024-06-04 15:33:48,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 1107 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:48,891 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 925 flow [2024-06-04 15:33:48,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=925, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-04 15:33:48,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-04 15:33:48,892 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 925 flow [2024-06-04 15:33:48,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:48,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:48,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:33:48,892 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:48,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1665671603, now seen corresponding path program 1 times [2024-06-04 15:33:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:48,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458043474] [2024-06-04 15:33:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:48,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:49,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458043474] [2024-06-04 15:33:49,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458043474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:49,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:49,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260434628] [2024-06-04 15:33:49,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:49,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:49,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:49,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:49,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 925 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:49,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:49,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:49,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:50,066 INFO L124 PetriNetUnfolderBase]: 1550/2413 cut-off events. [2024-06-04 15:33:50,067 INFO L125 PetriNetUnfolderBase]: For 21285/21285 co-relation queries the response was YES. [2024-06-04 15:33:50,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11951 conditions, 2413 events. 1550/2413 cut-off events. For 21285/21285 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12130 event pairs, 412 based on Foata normal form. 2/2411 useless extension candidates. Maximal degree in co-relation 11906. Up to 2241 conditions per place. [2024-06-04 15:33:50,099 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 110 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2024-06-04 15:33:50,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1492 flow [2024-06-04 15:33:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 15:33:50,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-04 15:33:50,100 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 925 flow. Second operand 7 states and 131 transitions. [2024-06-04 15:33:50,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1492 flow [2024-06-04 15:33:50,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 144 transitions, 1395 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:50,142 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1102 flow [2024-06-04 15:33:50,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1102, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2024-06-04 15:33:50,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-04 15:33:50,143 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1102 flow [2024-06-04 15:33:50,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:50,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:50,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:50,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:33:50,144 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:50,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1473285695, now seen corresponding path program 1 times [2024-06-04 15:33:50,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:50,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399445300] [2024-06-04 15:33:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:50,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:51,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:51,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399445300] [2024-06-04 15:33:51,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399445300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:51,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:51,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:51,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679277137] [2024-06-04 15:33:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:51,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:51,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:51,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 1102 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:51,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:51,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:51,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:51,802 INFO L124 PetriNetUnfolderBase]: 1670/2610 cut-off events. [2024-06-04 15:33:51,803 INFO L125 PetriNetUnfolderBase]: For 27851/27851 co-relation queries the response was YES. [2024-06-04 15:33:51,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13344 conditions, 2610 events. 1670/2610 cut-off events. For 27851/27851 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13306 event pairs, 491 based on Foata normal form. 30/2638 useless extension candidates. Maximal degree in co-relation 13295. Up to 2147 conditions per place. [2024-06-04 15:33:51,821 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 105 selfloop transitions, 53 changer transitions 0/163 dead transitions. [2024-06-04 15:33:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 1608 flow [2024-06-04 15:33:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:33:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:33:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:33:51,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:33:51,825 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1102 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:33:51,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 1608 flow [2024-06-04 15:33:51,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1590 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 15:33:51,849 INFO L231 Difference]: Finished difference. Result has 108 places, 132 transitions, 1308 flow [2024-06-04 15:33:51,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1308, PETRI_PLACES=108, PETRI_TRANSITIONS=132} [2024-06-04 15:33:51,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-04 15:33:51,850 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 132 transitions, 1308 flow [2024-06-04 15:33:51,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:51,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:51,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:51,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:33:51,850 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:51,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:51,851 INFO L85 PathProgramCache]: Analyzing trace with hash -683431645, now seen corresponding path program 2 times [2024-06-04 15:33:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:51,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541055523] [2024-06-04 15:33:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:52,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541055523] [2024-06-04 15:33:52,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541055523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:52,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:52,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:52,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134025359] [2024-06-04 15:33:52,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:52,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:52,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:52,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:52,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 132 transitions, 1308 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:52,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:52,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:52,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:53,305 INFO L124 PetriNetUnfolderBase]: 1773/2779 cut-off events. [2024-06-04 15:33:53,305 INFO L125 PetriNetUnfolderBase]: For 36315/36315 co-relation queries the response was YES. [2024-06-04 15:33:53,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15518 conditions, 2779 events. 1773/2779 cut-off events. For 36315/36315 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14370 event pairs, 491 based on Foata normal form. 4/2781 useless extension candidates. Maximal degree in co-relation 15465. Up to 1966 conditions per place. [2024-06-04 15:33:53,322 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 108 selfloop transitions, 53 changer transitions 0/166 dead transitions. [2024-06-04 15:33:53,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 166 transitions, 1866 flow [2024-06-04 15:33:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-04 15:33:53,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-04 15:33:53,324 INFO L175 Difference]: Start difference. First operand has 108 places, 132 transitions, 1308 flow. Second operand 8 states and 161 transitions. [2024-06-04 15:33:53,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 166 transitions, 1866 flow [2024-06-04 15:33:53,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 166 transitions, 1772 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:53,358 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1387 flow [2024-06-04 15:33:53,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1387, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-04 15:33:53,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-04 15:33:53,359 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1387 flow [2024-06-04 15:33:53,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:53,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:53,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:53,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:33:53,360 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:53,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1936002163, now seen corresponding path program 2 times [2024-06-04 15:33:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:53,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428715616] [2024-06-04 15:33:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:53,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:53,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428715616] [2024-06-04 15:33:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428715616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:53,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:53,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908916865] [2024-06-04 15:33:53,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:53,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:53,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:53,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:53,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1387 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:53,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:53,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:53,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:54,460 INFO L124 PetriNetUnfolderBase]: 1787/2804 cut-off events. [2024-06-04 15:33:54,461 INFO L125 PetriNetUnfolderBase]: For 40250/40250 co-relation queries the response was YES. [2024-06-04 15:33:54,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16029 conditions, 2804 events. 1787/2804 cut-off events. For 40250/40250 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14569 event pairs, 670 based on Foata normal form. 6/2809 useless extension candidates. Maximal degree in co-relation 15974. Up to 2678 conditions per place. [2024-06-04 15:33:54,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 124 selfloop transitions, 20 changer transitions 0/149 dead transitions. [2024-06-04 15:33:54,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 149 transitions, 1752 flow [2024-06-04 15:33:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:33:54,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-04 15:33:54,489 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1387 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:33:54,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 149 transitions, 1752 flow [2024-06-04 15:33:54,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1656 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:54,530 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1380 flow [2024-06-04 15:33:54,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1380, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-04 15:33:54,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-04 15:33:54,531 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1380 flow [2024-06-04 15:33:54,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:54,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:54,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:54,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:33:54,531 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:54,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 587291247, now seen corresponding path program 3 times [2024-06-04 15:33:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212922029] [2024-06-04 15:33:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:54,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:55,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:55,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212922029] [2024-06-04 15:33:55,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212922029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:55,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:55,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:55,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381940833] [2024-06-04 15:33:55,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:55,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:55,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:55,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:55,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1380 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:55,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:55,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:55,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:55,573 INFO L124 PetriNetUnfolderBase]: 1798/2821 cut-off events. [2024-06-04 15:33:55,573 INFO L125 PetriNetUnfolderBase]: For 41192/41192 co-relation queries the response was YES. [2024-06-04 15:33:55,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 2821 events. 1798/2821 cut-off events. For 41192/41192 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14630 event pairs, 539 based on Foata normal form. 2/2822 useless extension candidates. Maximal degree in co-relation 16329. Up to 2639 conditions per place. [2024-06-04 15:33:55,592 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 38 changer transitions 0/165 dead transitions. [2024-06-04 15:33:55,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 165 transitions, 1833 flow [2024-06-04 15:33:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 15:33:55,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-04 15:33:55,595 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1380 flow. Second operand 7 states and 135 transitions. [2024-06-04 15:33:55,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 165 transitions, 1833 flow [2024-06-04 15:33:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 165 transitions, 1748 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:55,638 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1473 flow [2024-06-04 15:33:55,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1473, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-04 15:33:55,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-04 15:33:55,639 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1473 flow [2024-06-04 15:33:55,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:55,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:55,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:33:55,640 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:55,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1792740179, now seen corresponding path program 1 times [2024-06-04 15:33:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663135484] [2024-06-04 15:33:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:56,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:56,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663135484] [2024-06-04 15:33:56,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663135484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:56,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:56,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:56,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765868779] [2024-06-04 15:33:56,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:56,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:56,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:56,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:56,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1473 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:56,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:56,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:56,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:57,311 INFO L124 PetriNetUnfolderBase]: 1790/2813 cut-off events. [2024-06-04 15:33:57,311 INFO L125 PetriNetUnfolderBase]: For 43886/43886 co-relation queries the response was YES. [2024-06-04 15:33:57,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16571 conditions, 2813 events. 1790/2813 cut-off events. For 43886/43886 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14615 event pairs, 515 based on Foata normal form. 4/2816 useless extension candidates. Maximal degree in co-relation 16513. Up to 2629 conditions per place. [2024-06-04 15:33:57,330 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 28 changer transitions 0/176 dead transitions. [2024-06-04 15:33:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 176 transitions, 1960 flow [2024-06-04 15:33:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:33:57,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-04 15:33:57,332 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1473 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:33:57,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 176 transitions, 1960 flow [2024-06-04 15:33:57,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1912 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 15:33:57,377 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1574 flow [2024-06-04 15:33:57,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1574, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-04 15:33:57,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-04 15:33:57,378 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1574 flow [2024-06-04 15:33:57,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:57,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:57,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:57,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:33:57,378 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:57,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1622037749, now seen corresponding path program 2 times [2024-06-04 15:33:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:57,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54312664] [2024-06-04 15:33:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:57,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:58,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:58,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54312664] [2024-06-04 15:33:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54312664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:58,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:58,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:58,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480877892] [2024-06-04 15:33:58,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:58,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:58,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:58,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:33:58,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1574 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:58,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:58,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:33:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:59,021 INFO L124 PetriNetUnfolderBase]: 1807/2840 cut-off events. [2024-06-04 15:33:59,022 INFO L125 PetriNetUnfolderBase]: For 48327/48327 co-relation queries the response was YES. [2024-06-04 15:33:59,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16990 conditions, 2840 events. 1807/2840 cut-off events. For 48327/48327 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14751 event pairs, 482 based on Foata normal form. 4/2843 useless extension candidates. Maximal degree in co-relation 16929. Up to 2652 conditions per place. [2024-06-04 15:33:59,044 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 30 changer transitions 0/180 dead transitions. [2024-06-04 15:33:59,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 180 transitions, 2038 flow [2024-06-04 15:33:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:33:59,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:33:59,046 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1574 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:33:59,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 180 transitions, 2038 flow [2024-06-04 15:33:59,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 180 transitions, 1958 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:59,097 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1599 flow [2024-06-04 15:33:59,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1599, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-04 15:33:59,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-04 15:33:59,098 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1599 flow [2024-06-04 15:33:59,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:59,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:59,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:59,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:33:59,099 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:59,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1508952915, now seen corresponding path program 3 times [2024-06-04 15:33:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:59,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833902066] [2024-06-04 15:33:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:59,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:59,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:59,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833902066] [2024-06-04 15:33:59,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833902066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:59,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:59,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:59,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045924518] [2024-06-04 15:33:59,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:59,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:00,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:00,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1599 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:00,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:00,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:00,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:00,663 INFO L124 PetriNetUnfolderBase]: 1799/2828 cut-off events. [2024-06-04 15:34:00,664 INFO L125 PetriNetUnfolderBase]: For 51148/51148 co-relation queries the response was YES. [2024-06-04 15:34:00,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17104 conditions, 2828 events. 1799/2828 cut-off events. For 51148/51148 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14699 event pairs, 373 based on Foata normal form. 4/2831 useless extension candidates. Maximal degree in co-relation 17042. Up to 2613 conditions per place. [2024-06-04 15:34:00,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-06-04 15:34:00,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 183 transitions, 2075 flow [2024-06-04 15:34:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:34:00,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:34:00,688 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1599 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:34:00,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 183 transitions, 2075 flow [2024-06-04 15:34:00,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 183 transitions, 1988 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:00,740 INFO L231 Difference]: Finished difference. Result has 130 places, 155 transitions, 1619 flow [2024-06-04 15:34:00,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1619, PETRI_PLACES=130, PETRI_TRANSITIONS=155} [2024-06-04 15:34:00,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-04 15:34:00,741 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 155 transitions, 1619 flow [2024-06-04 15:34:00,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:00,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:00,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:00,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:34:00,741 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:00,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 3899405, now seen corresponding path program 1 times [2024-06-04 15:34:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301646649] [2024-06-04 15:34:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:00,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:01,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:01,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301646649] [2024-06-04 15:34:01,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301646649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:01,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:01,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590946898] [2024-06-04 15:34:01,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:01,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:01,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:01,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 1619 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:01,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:01,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:01,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:02,312 INFO L124 PetriNetUnfolderBase]: 1826/2866 cut-off events. [2024-06-04 15:34:02,312 INFO L125 PetriNetUnfolderBase]: For 56302/56302 co-relation queries the response was YES. [2024-06-04 15:34:02,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17647 conditions, 2866 events. 1826/2866 cut-off events. For 56302/56302 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14969 event pairs, 486 based on Foata normal form. 2/2863 useless extension candidates. Maximal degree in co-relation 17584. Up to 2505 conditions per place. [2024-06-04 15:34:02,335 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 64 changer transitions 0/185 dead transitions. [2024-06-04 15:34:02,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 2239 flow [2024-06-04 15:34:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:34:02,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-04 15:34:02,337 INFO L175 Difference]: Start difference. First operand has 130 places, 155 transitions, 1619 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:34:02,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 2239 flow [2024-06-04 15:34:02,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 185 transitions, 2150 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:02,396 INFO L231 Difference]: Finished difference. Result has 132 places, 161 transitions, 1780 flow [2024-06-04 15:34:02,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1780, PETRI_PLACES=132, PETRI_TRANSITIONS=161} [2024-06-04 15:34:02,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-04 15:34:02,397 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 161 transitions, 1780 flow [2024-06-04 15:34:02,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:02,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:02,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:02,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:34:02,397 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:02,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:02,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1386306269, now seen corresponding path program 2 times [2024-06-04 15:34:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:02,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847398493] [2024-06-04 15:34:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:03,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:03,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847398493] [2024-06-04 15:34:03,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847398493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:03,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:03,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:03,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105201208] [2024-06-04 15:34:03,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:03,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:03,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:03,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 161 transitions, 1780 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:03,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:03,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:03,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:04,125 INFO L124 PetriNetUnfolderBase]: 1821/2855 cut-off events. [2024-06-04 15:34:04,125 INFO L125 PetriNetUnfolderBase]: For 61197/61197 co-relation queries the response was YES. [2024-06-04 15:34:04,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18088 conditions, 2855 events. 1821/2855 cut-off events. For 61197/61197 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14895 event pairs, 485 based on Foata normal form. 2/2851 useless extension candidates. Maximal degree in co-relation 18024. Up to 2509 conditions per place. [2024-06-04 15:34:04,148 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 113 selfloop transitions, 61 changer transitions 0/179 dead transitions. [2024-06-04 15:34:04,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 179 transitions, 2182 flow [2024-06-04 15:34:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 15:34:04,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-04 15:34:04,149 INFO L175 Difference]: Start difference. First operand has 132 places, 161 transitions, 1780 flow. Second operand 7 states and 139 transitions. [2024-06-04 15:34:04,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 179 transitions, 2182 flow [2024-06-04 15:34:04,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 179 transitions, 2005 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:04,222 INFO L231 Difference]: Finished difference. Result has 134 places, 161 transitions, 1742 flow [2024-06-04 15:34:04,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1742, PETRI_PLACES=134, PETRI_TRANSITIONS=161} [2024-06-04 15:34:04,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-04 15:34:04,223 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 161 transitions, 1742 flow [2024-06-04 15:34:04,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:04,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:04,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:04,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:34:04,223 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:04,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -96210630, now seen corresponding path program 1 times [2024-06-04 15:34:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:04,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135116673] [2024-06-04 15:34:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:04,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:04,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:04,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135116673] [2024-06-04 15:34:04,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135116673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:04,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:04,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:04,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640658420] [2024-06-04 15:34:04,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:04,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:04,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:04,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:04,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 161 transitions, 1742 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:04,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:04,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:04,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:05,583 INFO L124 PetriNetUnfolderBase]: 1873/2940 cut-off events. [2024-06-04 15:34:05,583 INFO L125 PetriNetUnfolderBase]: For 67148/67148 co-relation queries the response was YES. [2024-06-04 15:34:05,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18784 conditions, 2940 events. 1873/2940 cut-off events. For 67148/67148 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15384 event pairs, 452 based on Foata normal form. 4/2940 useless extension candidates. Maximal degree in co-relation 18719. Up to 2656 conditions per place. [2024-06-04 15:34:05,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 50 changer transitions 0/192 dead transitions. [2024-06-04 15:34:05,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 192 transitions, 2447 flow [2024-06-04 15:34:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:34:05,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-04 15:34:05,608 INFO L175 Difference]: Start difference. First operand has 134 places, 161 transitions, 1742 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:34:05,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 192 transitions, 2447 flow [2024-06-04 15:34:05,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 192 transitions, 2325 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:05,682 INFO L231 Difference]: Finished difference. Result has 136 places, 170 transitions, 1853 flow [2024-06-04 15:34:05,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1853, PETRI_PLACES=136, PETRI_TRANSITIONS=170} [2024-06-04 15:34:05,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-04 15:34:05,683 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 170 transitions, 1853 flow [2024-06-04 15:34:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:05,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:05,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:34:05,683 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:05,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1287676391, now seen corresponding path program 3 times [2024-06-04 15:34:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:05,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511630882] [2024-06-04 15:34:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:06,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:06,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511630882] [2024-06-04 15:34:06,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511630882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:06,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:06,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:06,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723779249] [2024-06-04 15:34:06,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:06,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:06,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 170 transitions, 1853 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:06,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:06,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:06,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:07,316 INFO L124 PetriNetUnfolderBase]: 1884/2952 cut-off events. [2024-06-04 15:34:07,317 INFO L125 PetriNetUnfolderBase]: For 72075/72075 co-relation queries the response was YES. [2024-06-04 15:34:07,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19291 conditions, 2952 events. 1884/2952 cut-off events. For 72075/72075 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15478 event pairs, 487 based on Foata normal form. 2/2949 useless extension candidates. Maximal degree in co-relation 19225. Up to 2606 conditions per place. [2024-06-04 15:34:07,339 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 135 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-04 15:34:07,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 195 transitions, 2359 flow [2024-06-04 15:34:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 15:34:07,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-04 15:34:07,341 INFO L175 Difference]: Start difference. First operand has 136 places, 170 transitions, 1853 flow. Second operand 8 states and 155 transitions. [2024-06-04 15:34:07,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 195 transitions, 2359 flow [2024-06-04 15:34:07,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 195 transitions, 2310 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:07,410 INFO L231 Difference]: Finished difference. Result has 141 places, 173 transitions, 1988 flow [2024-06-04 15:34:07,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1988, PETRI_PLACES=141, PETRI_TRANSITIONS=173} [2024-06-04 15:34:07,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 15:34:07,411 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 173 transitions, 1988 flow [2024-06-04 15:34:07,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:07,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:07,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:07,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:34:07,412 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:07,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1572776261, now seen corresponding path program 4 times [2024-06-04 15:34:07,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:07,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235365225] [2024-06-04 15:34:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:07,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235365225] [2024-06-04 15:34:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235365225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:08,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:08,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:08,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844489366] [2024-06-04 15:34:08,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:08,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:08,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:08,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:08,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:08,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 173 transitions, 1988 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:08,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:08,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:08,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:08,949 INFO L124 PetriNetUnfolderBase]: 1879/2945 cut-off events. [2024-06-04 15:34:08,949 INFO L125 PetriNetUnfolderBase]: For 78560/78560 co-relation queries the response was YES. [2024-06-04 15:34:08,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19785 conditions, 2945 events. 1879/2945 cut-off events. For 78560/78560 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15481 event pairs, 487 based on Foata normal form. 2/2942 useless extension candidates. Maximal degree in co-relation 19717. Up to 2536 conditions per place. [2024-06-04 15:34:08,974 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 125 selfloop transitions, 68 changer transitions 0/198 dead transitions. [2024-06-04 15:34:08,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 198 transitions, 2506 flow [2024-06-04 15:34:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:34:08,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:34:08,976 INFO L175 Difference]: Start difference. First operand has 141 places, 173 transitions, 1988 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:34:08,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 198 transitions, 2506 flow [2024-06-04 15:34:09,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 2338 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:09,055 INFO L231 Difference]: Finished difference. Result has 143 places, 176 transitions, 2036 flow [2024-06-04 15:34:09,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2036, PETRI_PLACES=143, PETRI_TRANSITIONS=176} [2024-06-04 15:34:09,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-04 15:34:09,056 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 176 transitions, 2036 flow [2024-06-04 15:34:09,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:09,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:09,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:09,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:34:09,057 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:09,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1719080280, now seen corresponding path program 2 times [2024-06-04 15:34:09,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:09,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193104137] [2024-06-04 15:34:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:09,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:09,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193104137] [2024-06-04 15:34:09,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193104137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:09,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:09,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405949021] [2024-06-04 15:34:09,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:09,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:09,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:09,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:09,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 176 transitions, 2036 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:09,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:09,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:09,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:10,132 INFO L124 PetriNetUnfolderBase]: 1867/2934 cut-off events. [2024-06-04 15:34:10,133 INFO L125 PetriNetUnfolderBase]: For 83666/83666 co-relation queries the response was YES. [2024-06-04 15:34:10,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19996 conditions, 2934 events. 1867/2934 cut-off events. For 83666/83666 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15418 event pairs, 477 based on Foata normal form. 4/2937 useless extension candidates. Maximal degree in co-relation 19927. Up to 2725 conditions per place. [2024-06-04 15:34:10,155 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 151 selfloop transitions, 37 changer transitions 0/193 dead transitions. [2024-06-04 15:34:10,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 193 transitions, 2486 flow [2024-06-04 15:34:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:34:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:34:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-04 15:34:10,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-06-04 15:34:10,156 INFO L175 Difference]: Start difference. First operand has 143 places, 176 transitions, 2036 flow. Second operand 6 states and 121 transitions. [2024-06-04 15:34:10,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 193 transitions, 2486 flow [2024-06-04 15:34:10,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 193 transitions, 2280 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:10,248 INFO L231 Difference]: Finished difference. Result has 143 places, 176 transitions, 1910 flow [2024-06-04 15:34:10,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1910, PETRI_PLACES=143, PETRI_TRANSITIONS=176} [2024-06-04 15:34:10,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-04 15:34:10,249 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 176 transitions, 1910 flow [2024-06-04 15:34:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:10,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:10,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:10,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:34:10,250 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:10,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1025699704, now seen corresponding path program 3 times [2024-06-04 15:34:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:10,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460225634] [2024-06-04 15:34:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:10,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:10,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460225634] [2024-06-04 15:34:10,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460225634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:10,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:10,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:10,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121348756] [2024-06-04 15:34:10,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:10,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:10,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:10,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 176 transitions, 1910 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:10,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:10,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:10,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:11,403 INFO L124 PetriNetUnfolderBase]: 1875/2946 cut-off events. [2024-06-04 15:34:11,404 INFO L125 PetriNetUnfolderBase]: For 85259/85259 co-relation queries the response was YES. [2024-06-04 15:34:11,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19801 conditions, 2946 events. 1875/2946 cut-off events. For 85259/85259 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15504 event pairs, 474 based on Foata normal form. 4/2949 useless extension candidates. Maximal degree in co-relation 19731. Up to 2665 conditions per place. [2024-06-04 15:34:11,427 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 142 selfloop transitions, 55 changer transitions 0/202 dead transitions. [2024-06-04 15:34:11,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 202 transitions, 2423 flow [2024-06-04 15:34:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 15:34:11,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-04 15:34:11,429 INFO L175 Difference]: Start difference. First operand has 143 places, 176 transitions, 1910 flow. Second operand 8 states and 155 transitions. [2024-06-04 15:34:11,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 202 transitions, 2423 flow [2024-06-04 15:34:11,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 202 transitions, 2297 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:11,522 INFO L231 Difference]: Finished difference. Result has 146 places, 179 transitions, 1921 flow [2024-06-04 15:34:11,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1921, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2024-06-04 15:34:11,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-04 15:34:11,525 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1921 flow [2024-06-04 15:34:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:11,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:11,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:11,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:34:11,526 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:11,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1729161314, now seen corresponding path program 1 times [2024-06-04 15:34:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:11,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599140542] [2024-06-04 15:34:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:11,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:12,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599140542] [2024-06-04 15:34:12,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599140542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:12,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:12,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717807110] [2024-06-04 15:34:12,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:12,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:12,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1921 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:12,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:12,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:12,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:12,702 INFO L124 PetriNetUnfolderBase]: 1922/3008 cut-off events. [2024-06-04 15:34:12,702 INFO L125 PetriNetUnfolderBase]: For 89748/89748 co-relation queries the response was YES. [2024-06-04 15:34:12,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20449 conditions, 3008 events. 1922/3008 cut-off events. For 89748/89748 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15756 event pairs, 469 based on Foata normal form. 3/3008 useless extension candidates. Maximal degree in co-relation 20378. Up to 2651 conditions per place. [2024-06-04 15:34:12,727 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 51 changer transitions 0/222 dead transitions. [2024-06-04 15:34:12,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 222 transitions, 2820 flow [2024-06-04 15:34:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 15:34:12,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-04 15:34:12,729 INFO L175 Difference]: Start difference. First operand has 146 places, 179 transitions, 1921 flow. Second operand 7 states and 139 transitions. [2024-06-04 15:34:12,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 222 transitions, 2820 flow [2024-06-04 15:34:12,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 222 transitions, 2720 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:12,832 INFO L231 Difference]: Finished difference. Result has 150 places, 201 transitions, 2262 flow [2024-06-04 15:34:12,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2262, PETRI_PLACES=150, PETRI_TRANSITIONS=201} [2024-06-04 15:34:12,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 15:34:12,833 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 201 transitions, 2262 flow [2024-06-04 15:34:12,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:12,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:12,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:12,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:34:12,834 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:12,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:12,834 INFO L85 PathProgramCache]: Analyzing trace with hash -63439840, now seen corresponding path program 2 times [2024-06-04 15:34:12,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:12,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859738645] [2024-06-04 15:34:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:12,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:13,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859738645] [2024-06-04 15:34:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859738645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:13,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:13,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894806582] [2024-06-04 15:34:13,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:13,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:13,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:13,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 201 transitions, 2262 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:13,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:13,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:13,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:14,198 INFO L124 PetriNetUnfolderBase]: 2090/3270 cut-off events. [2024-06-04 15:34:14,198 INFO L125 PetriNetUnfolderBase]: For 107713/107713 co-relation queries the response was YES. [2024-06-04 15:34:14,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23287 conditions, 3270 events. 2090/3270 cut-off events. For 107713/107713 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17507 event pairs, 623 based on Foata normal form. 9/3278 useless extension candidates. Maximal degree in co-relation 23213. Up to 2985 conditions per place. [2024-06-04 15:34:14,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 201 selfloop transitions, 37 changer transitions 0/243 dead transitions. [2024-06-04 15:34:14,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 243 transitions, 3170 flow [2024-06-04 15:34:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:34:14,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:34:14,228 INFO L175 Difference]: Start difference. First operand has 150 places, 201 transitions, 2262 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:34:14,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 243 transitions, 3170 flow [2024-06-04 15:34:14,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 243 transitions, 3088 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-04 15:34:14,352 INFO L231 Difference]: Finished difference. Result has 158 places, 221 transitions, 2581 flow [2024-06-04 15:34:14,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2581, PETRI_PLACES=158, PETRI_TRANSITIONS=221} [2024-06-04 15:34:14,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-04 15:34:14,353 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 221 transitions, 2581 flow [2024-06-04 15:34:14,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:14,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:14,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:34:14,354 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:14,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:14,354 INFO L85 PathProgramCache]: Analyzing trace with hash 555197822, now seen corresponding path program 3 times [2024-06-04 15:34:14,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:14,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962466564] [2024-06-04 15:34:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:14,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962466564] [2024-06-04 15:34:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962466564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:14,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155247656] [2024-06-04 15:34:14,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:14,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:14,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:14,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 221 transitions, 2581 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:14,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:14,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:14,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:15,650 INFO L124 PetriNetUnfolderBase]: 2245/3507 cut-off events. [2024-06-04 15:34:15,651 INFO L125 PetriNetUnfolderBase]: For 121975/121975 co-relation queries the response was YES. [2024-06-04 15:34:15,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25933 conditions, 3507 events. 2245/3507 cut-off events. For 121975/121975 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18985 event pairs, 520 based on Foata normal form. 9/3515 useless extension candidates. Maximal degree in co-relation 25855. Up to 3053 conditions per place. [2024-06-04 15:34:15,683 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 194 selfloop transitions, 69 changer transitions 0/268 dead transitions. [2024-06-04 15:34:15,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 268 transitions, 3574 flow [2024-06-04 15:34:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-04 15:34:15,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-04 15:34:15,685 INFO L175 Difference]: Start difference. First operand has 158 places, 221 transitions, 2581 flow. Second operand 7 states and 148 transitions. [2024-06-04 15:34:15,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 268 transitions, 3574 flow [2024-06-04 15:34:15,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 268 transitions, 3445 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:15,839 INFO L231 Difference]: Finished difference. Result has 164 places, 242 transitions, 3009 flow [2024-06-04 15:34:15,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3009, PETRI_PLACES=164, PETRI_TRANSITIONS=242} [2024-06-04 15:34:15,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-04 15:34:15,841 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 242 transitions, 3009 flow [2024-06-04 15:34:15,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:15,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:15,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:34:15,842 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:15,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash 555444086, now seen corresponding path program 1 times [2024-06-04 15:34:15,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:15,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508590433] [2024-06-04 15:34:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:15,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:16,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:16,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508590433] [2024-06-04 15:34:16,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508590433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:16,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:16,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:16,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661427334] [2024-06-04 15:34:16,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:16,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:16,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:16,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:16,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 242 transitions, 3009 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:16,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:16,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:16,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:17,294 INFO L124 PetriNetUnfolderBase]: 2240/3499 cut-off events. [2024-06-04 15:34:17,294 INFO L125 PetriNetUnfolderBase]: For 129300/129300 co-relation queries the response was YES. [2024-06-04 15:34:17,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27149 conditions, 3499 events. 2240/3499 cut-off events. For 129300/129300 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18933 event pairs, 680 based on Foata normal form. 2/3500 useless extension candidates. Maximal degree in co-relation 27067. Up to 3330 conditions per place. [2024-06-04 15:34:17,326 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 233 selfloop transitions, 14 changer transitions 0/252 dead transitions. [2024-06-04 15:34:17,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 252 transitions, 3557 flow [2024-06-04 15:34:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:34:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:34:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-04 15:34:17,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:34:17,328 INFO L175 Difference]: Start difference. First operand has 164 places, 242 transitions, 3009 flow. Second operand 5 states and 95 transitions. [2024-06-04 15:34:17,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 252 transitions, 3557 flow [2024-06-04 15:34:17,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 252 transitions, 3456 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-04 15:34:17,521 INFO L231 Difference]: Finished difference. Result has 167 places, 244 transitions, 2977 flow [2024-06-04 15:34:17,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2977, PETRI_PLACES=167, PETRI_TRANSITIONS=244} [2024-06-04 15:34:17,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-04 15:34:17,521 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 244 transitions, 2977 flow [2024-06-04 15:34:17,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:17,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:17,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:34:17,522 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:17,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash -259627914, now seen corresponding path program 1 times [2024-06-04 15:34:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:17,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282515615] [2024-06-04 15:34:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282515615] [2024-06-04 15:34:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282515615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:18,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:18,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:18,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583500054] [2024-06-04 15:34:18,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:18,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:18,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:18,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 244 transitions, 2977 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:18,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:18,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:18,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:19,154 INFO L124 PetriNetUnfolderBase]: 2232/3479 cut-off events. [2024-06-04 15:34:19,154 INFO L125 PetriNetUnfolderBase]: For 132415/132415 co-relation queries the response was YES. [2024-06-04 15:34:19,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27035 conditions, 3479 events. 2232/3479 cut-off events. For 132415/132415 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18792 event pairs, 523 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 26951. Up to 3008 conditions per place. [2024-06-04 15:34:19,244 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 215 selfloop transitions, 53 changer transitions 0/273 dead transitions. [2024-06-04 15:34:19,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 273 transitions, 3660 flow [2024-06-04 15:34:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:34:19,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:34:19,247 INFO L175 Difference]: Start difference. First operand has 167 places, 244 transitions, 2977 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:34:19,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 273 transitions, 3660 flow [2024-06-04 15:34:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 273 transitions, 3607 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:19,391 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 3133 flow [2024-06-04 15:34:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3133, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-04 15:34:19,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-04 15:34:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 3133 flow [2024-06-04 15:34:19,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:19,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:19,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:34:19,393 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:19,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1319276670, now seen corresponding path program 2 times [2024-06-04 15:34:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:19,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537223450] [2024-06-04 15:34:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:19,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:20,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:20,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537223450] [2024-06-04 15:34:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537223450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:20,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949353873] [2024-06-04 15:34:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:20,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:20,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:20,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:20,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:20,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:20,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 3133 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:20,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:20,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:20,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:21,142 INFO L124 PetriNetUnfolderBase]: 2325/3627 cut-off events. [2024-06-04 15:34:21,142 INFO L125 PetriNetUnfolderBase]: For 143208/143208 co-relation queries the response was YES. [2024-06-04 15:34:21,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28522 conditions, 3627 events. 2325/3627 cut-off events. For 143208/143208 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19701 event pairs, 488 based on Foata normal form. 4/3628 useless extension candidates. Maximal degree in co-relation 28436. Up to 3327 conditions per place. [2024-06-04 15:34:21,178 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-04 15:34:21,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 291 transitions, 4089 flow [2024-06-04 15:34:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:34:21,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-04 15:34:21,180 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 3133 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:34:21,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 291 transitions, 4089 flow [2024-06-04 15:34:21,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 291 transitions, 3989 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:21,370 INFO L231 Difference]: Finished difference. Result has 181 places, 263 transitions, 3334 flow [2024-06-04 15:34:21,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3036, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3334, PETRI_PLACES=181, PETRI_TRANSITIONS=263} [2024-06-04 15:34:21,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-04 15:34:21,371 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 263 transitions, 3334 flow [2024-06-04 15:34:21,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:21,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:21,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:21,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:34:21,371 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:21,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1568655410, now seen corresponding path program 3 times [2024-06-04 15:34:21,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:21,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518403360] [2024-06-04 15:34:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:21,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:22,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518403360] [2024-06-04 15:34:22,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518403360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:22,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552126004] [2024-06-04 15:34:22,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:22,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:22,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:22,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:22,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 263 transitions, 3334 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:22,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:22,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:22,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:23,163 INFO L124 PetriNetUnfolderBase]: 2334/3637 cut-off events. [2024-06-04 15:34:23,164 INFO L125 PetriNetUnfolderBase]: For 150063/150063 co-relation queries the response was YES. [2024-06-04 15:34:23,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28767 conditions, 3637 events. 2334/3637 cut-off events. For 150063/150063 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19700 event pairs, 509 based on Foata normal form. 8/3640 useless extension candidates. Maximal degree in co-relation 28678. Up to 3199 conditions per place. [2024-06-04 15:34:23,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 215 selfloop transitions, 65 changer transitions 0/285 dead transitions. [2024-06-04 15:34:23,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 285 transitions, 4003 flow [2024-06-04 15:34:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 15:34:23,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-04 15:34:23,201 INFO L175 Difference]: Start difference. First operand has 181 places, 263 transitions, 3334 flow. Second operand 7 states and 137 transitions. [2024-06-04 15:34:23,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 285 transitions, 4003 flow [2024-06-04 15:34:23,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 285 transitions, 3912 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-04 15:34:23,405 INFO L231 Difference]: Finished difference. Result has 186 places, 266 transitions, 3445 flow [2024-06-04 15:34:23,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3445, PETRI_PLACES=186, PETRI_TRANSITIONS=266} [2024-06-04 15:34:23,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-04 15:34:23,406 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 266 transitions, 3445 flow [2024-06-04 15:34:23,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:23,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:23,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:23,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:34:23,407 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:23,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1434609986, now seen corresponding path program 4 times [2024-06-04 15:34:23,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:23,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283842927] [2024-06-04 15:34:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:23,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:24,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:24,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283842927] [2024-06-04 15:34:24,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283842927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:24,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:24,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:24,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613874929] [2024-06-04 15:34:24,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:24,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:24,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:24,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:24,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:24,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 266 transitions, 3445 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:24,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:24,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:24,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:25,016 INFO L124 PetriNetUnfolderBase]: 2351/3669 cut-off events. [2024-06-04 15:34:25,016 INFO L125 PetriNetUnfolderBase]: For 156791/156791 co-relation queries the response was YES. [2024-06-04 15:34:25,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29378 conditions, 3669 events. 2351/3669 cut-off events. For 156791/156791 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19980 event pairs, 402 based on Foata normal form. 4/3668 useless extension candidates. Maximal degree in co-relation 29287. Up to 3369 conditions per place. [2024-06-04 15:34:25,055 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 29 changer transitions 0/289 dead transitions. [2024-06-04 15:34:25,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 289 transitions, 4125 flow [2024-06-04 15:34:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 15:34:25,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-04 15:34:25,057 INFO L175 Difference]: Start difference. First operand has 186 places, 266 transitions, 3445 flow. Second operand 7 states and 132 transitions. [2024-06-04 15:34:25,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 289 transitions, 4125 flow [2024-06-04 15:34:25,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 289 transitions, 3968 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:25,311 INFO L231 Difference]: Finished difference. Result has 188 places, 268 transitions, 3409 flow [2024-06-04 15:34:25,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3409, PETRI_PLACES=188, PETRI_TRANSITIONS=268} [2024-06-04 15:34:25,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-04 15:34:25,311 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 268 transitions, 3409 flow [2024-06-04 15:34:25,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:25,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:25,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:25,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:34:25,312 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:25,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash -599405740, now seen corresponding path program 1 times [2024-06-04 15:34:25,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:25,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977651170] [2024-06-04 15:34:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:26,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:26,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977651170] [2024-06-04 15:34:26,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977651170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:26,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:26,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:26,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482085845] [2024-06-04 15:34:26,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:26,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:26,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:26,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:26,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 268 transitions, 3409 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:26,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:26,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:26,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:27,259 INFO L124 PetriNetUnfolderBase]: 2519/3964 cut-off events. [2024-06-04 15:34:27,259 INFO L125 PetriNetUnfolderBase]: For 180798/180798 co-relation queries the response was YES. [2024-06-04 15:34:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31804 conditions, 3964 events. 2519/3964 cut-off events. For 180798/180798 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22219 event pairs, 469 based on Foata normal form. 12/3971 useless extension candidates. Maximal degree in co-relation 31712. Up to 3179 conditions per place. [2024-06-04 15:34:27,294 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 225 selfloop transitions, 76 changer transitions 0/306 dead transitions. [2024-06-04 15:34:27,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 306 transitions, 4393 flow [2024-06-04 15:34:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:34:27,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:34:27,298 INFO L175 Difference]: Start difference. First operand has 188 places, 268 transitions, 3409 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:34:27,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 306 transitions, 4393 flow [2024-06-04 15:34:27,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 306 transitions, 4290 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:27,526 INFO L231 Difference]: Finished difference. Result has 193 places, 271 transitions, 3563 flow [2024-06-04 15:34:27,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3563, PETRI_PLACES=193, PETRI_TRANSITIONS=271} [2024-06-04 15:34:27,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-04 15:34:27,527 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 271 transitions, 3563 flow [2024-06-04 15:34:27,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:27,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:27,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:27,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:34:27,528 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:27,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1894219634, now seen corresponding path program 2 times [2024-06-04 15:34:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:27,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060738169] [2024-06-04 15:34:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:27,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:28,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:28,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060738169] [2024-06-04 15:34:28,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060738169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:28,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:28,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199857008] [2024-06-04 15:34:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:28,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:28,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:28,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:28,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 271 transitions, 3563 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:28,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:28,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:28,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:29,530 INFO L124 PetriNetUnfolderBase]: 2577/4062 cut-off events. [2024-06-04 15:34:29,530 INFO L125 PetriNetUnfolderBase]: For 195313/195313 co-relation queries the response was YES. [2024-06-04 15:34:29,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33005 conditions, 4062 events. 2577/4062 cut-off events. For 195313/195313 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22982 event pairs, 585 based on Foata normal form. 16/4073 useless extension candidates. Maximal degree in co-relation 32911. Up to 3520 conditions per place. [2024-06-04 15:34:29,569 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 73 changer transitions 0/302 dead transitions. [2024-06-04 15:34:29,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 302 transitions, 4326 flow [2024-06-04 15:34:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 15:34:29,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-04 15:34:29,571 INFO L175 Difference]: Start difference. First operand has 193 places, 271 transitions, 3563 flow. Second operand 9 states and 175 transitions. [2024-06-04 15:34:29,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 302 transitions, 4326 flow [2024-06-04 15:34:29,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 302 transitions, 4207 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:29,914 INFO L231 Difference]: Finished difference. Result has 197 places, 272 transitions, 3638 flow [2024-06-04 15:34:29,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3638, PETRI_PLACES=197, PETRI_TRANSITIONS=272} [2024-06-04 15:34:29,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 15:34:29,914 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 272 transitions, 3638 flow [2024-06-04 15:34:29,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:29,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:29,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:34:29,915 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:29,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:29,915 INFO L85 PathProgramCache]: Analyzing trace with hash 837811766, now seen corresponding path program 3 times [2024-06-04 15:34:29,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:29,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801371099] [2024-06-04 15:34:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:29,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:30,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801371099] [2024-06-04 15:34:30,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801371099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:30,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:30,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:30,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694045059] [2024-06-04 15:34:30,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:30,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:30,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:30,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:31,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:31,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 272 transitions, 3638 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:31,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:31,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:31,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:31,941 INFO L124 PetriNetUnfolderBase]: 2549/4018 cut-off events. [2024-06-04 15:34:31,941 INFO L125 PetriNetUnfolderBase]: For 192565/192565 co-relation queries the response was YES. [2024-06-04 15:34:31,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32405 conditions, 4018 events. 2549/4018 cut-off events. For 192565/192565 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22635 event pairs, 483 based on Foata normal form. 16/4029 useless extension candidates. Maximal degree in co-relation 32309. Up to 3518 conditions per place. [2024-06-04 15:34:31,980 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 234 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-04 15:34:31,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 299 transitions, 4357 flow [2024-06-04 15:34:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 15:34:31,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:34:31,982 INFO L175 Difference]: Start difference. First operand has 197 places, 272 transitions, 3638 flow. Second operand 8 states and 160 transitions. [2024-06-04 15:34:31,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 299 transitions, 4357 flow [2024-06-04 15:34:32,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 299 transitions, 4190 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:32,283 INFO L231 Difference]: Finished difference. Result has 198 places, 273 transitions, 3617 flow [2024-06-04 15:34:32,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3617, PETRI_PLACES=198, PETRI_TRANSITIONS=273} [2024-06-04 15:34:32,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-04 15:34:32,284 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 273 transitions, 3617 flow [2024-06-04 15:34:32,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:32,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:32,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:32,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:34:32,285 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:32,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1488298434, now seen corresponding path program 1 times [2024-06-04 15:34:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558996238] [2024-06-04 15:34:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:32,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:32,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:32,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558996238] [2024-06-04 15:34:32,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558996238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:32,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:32,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:32,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125858170] [2024-06-04 15:34:32,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:32,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:32,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:32,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:32,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:32,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 273 transitions, 3617 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:32,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:32,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:33,610 INFO L124 PetriNetUnfolderBase]: 2591/4090 cut-off events. [2024-06-04 15:34:33,610 INFO L125 PetriNetUnfolderBase]: For 194422/194422 co-relation queries the response was YES. [2024-06-04 15:34:33,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33145 conditions, 4090 events. 2591/4090 cut-off events. For 194422/194422 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23212 event pairs, 576 based on Foata normal form. 2/4091 useless extension candidates. Maximal degree in co-relation 33048. Up to 3804 conditions per place. [2024-06-04 15:34:33,651 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 254 selfloop transitions, 43 changer transitions 0/302 dead transitions. [2024-06-04 15:34:33,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 302 transitions, 4556 flow [2024-06-04 15:34:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 15:34:33,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-04 15:34:33,653 INFO L175 Difference]: Start difference. First operand has 198 places, 273 transitions, 3617 flow. Second operand 7 states and 135 transitions. [2024-06-04 15:34:33,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 302 transitions, 4556 flow [2024-06-04 15:34:33,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 302 transitions, 4419 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:33,947 INFO L231 Difference]: Finished difference. Result has 199 places, 282 transitions, 3787 flow [2024-06-04 15:34:33,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3787, PETRI_PLACES=199, PETRI_TRANSITIONS=282} [2024-06-04 15:34:33,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-04 15:34:33,948 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 282 transitions, 3787 flow [2024-06-04 15:34:33,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:33,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:33,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:33,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:34:33,948 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:33,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1409572622, now seen corresponding path program 2 times [2024-06-04 15:34:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:33,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141417649] [2024-06-04 15:34:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:34,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:34,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141417649] [2024-06-04 15:34:34,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141417649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:34,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:34,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:34,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727329527] [2024-06-04 15:34:34,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:34,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:34,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:34,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:34,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 282 transitions, 3787 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:34,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:34,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:34,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:35,314 INFO L124 PetriNetUnfolderBase]: 2585/4089 cut-off events. [2024-06-04 15:34:35,314 INFO L125 PetriNetUnfolderBase]: For 199902/199902 co-relation queries the response was YES. [2024-06-04 15:34:35,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33138 conditions, 4089 events. 2585/4089 cut-off events. For 199902/199902 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23235 event pairs, 581 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 33040. Up to 3859 conditions per place. [2024-06-04 15:34:35,362 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 30 changer transitions 0/297 dead transitions. [2024-06-04 15:34:35,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 297 transitions, 4429 flow [2024-06-04 15:34:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:34:35,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-04 15:34:35,363 INFO L175 Difference]: Start difference. First operand has 199 places, 282 transitions, 3787 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:34:35,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 297 transitions, 4429 flow [2024-06-04 15:34:35,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 297 transitions, 4354 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:35,683 INFO L231 Difference]: Finished difference. Result has 203 places, 282 transitions, 3780 flow [2024-06-04 15:34:35,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3780, PETRI_PLACES=203, PETRI_TRANSITIONS=282} [2024-06-04 15:34:35,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-04 15:34:35,684 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 282 transitions, 3780 flow [2024-06-04 15:34:35,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:35,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:35,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:35,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:34:35,689 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:35,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1825391422, now seen corresponding path program 4 times [2024-06-04 15:34:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:35,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365598540] [2024-06-04 15:34:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365598540] [2024-06-04 15:34:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365598540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:36,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:36,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:36,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871502800] [2024-06-04 15:34:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:36,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:36,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:36,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 282 transitions, 3780 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:36,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:36,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:36,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:37,950 INFO L124 PetriNetUnfolderBase]: 2687/4271 cut-off events. [2024-06-04 15:34:37,950 INFO L125 PetriNetUnfolderBase]: For 224577/224577 co-relation queries the response was YES. [2024-06-04 15:34:37,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34964 conditions, 4271 events. 2687/4271 cut-off events. For 224577/224577 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24697 event pairs, 574 based on Foata normal form. 12/4281 useless extension candidates. Maximal degree in co-relation 34865. Up to 2913 conditions per place. [2024-06-04 15:34:37,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 67 changer transitions 0/320 dead transitions. [2024-06-04 15:34:37,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 320 transitions, 4802 flow [2024-06-04 15:34:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 15:34:37,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-04 15:34:37,996 INFO L175 Difference]: Start difference. First operand has 203 places, 282 transitions, 3780 flow. Second operand 9 states and 179 transitions. [2024-06-04 15:34:37,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 320 transitions, 4802 flow [2024-06-04 15:34:38,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 320 transitions, 4716 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:38,305 INFO L231 Difference]: Finished difference. Result has 208 places, 284 transitions, 3912 flow [2024-06-04 15:34:38,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3912, PETRI_PLACES=208, PETRI_TRANSITIONS=284} [2024-06-04 15:34:38,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-04 15:34:38,307 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 284 transitions, 3912 flow [2024-06-04 15:34:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:38,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:38,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:38,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:34:38,308 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:38,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1511692192, now seen corresponding path program 5 times [2024-06-04 15:34:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:38,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305452500] [2024-06-04 15:34:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:39,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:39,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305452500] [2024-06-04 15:34:39,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305452500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:39,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:39,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:39,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525435428] [2024-06-04 15:34:39,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:39,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:39,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:39,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:39,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 284 transitions, 3912 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:39,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:39,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:39,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:40,456 INFO L124 PetriNetUnfolderBase]: 2831/4521 cut-off events. [2024-06-04 15:34:40,456 INFO L125 PetriNetUnfolderBase]: For 252224/252224 co-relation queries the response was YES. [2024-06-04 15:34:40,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37827 conditions, 4521 events. 2831/4521 cut-off events. For 252224/252224 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26622 event pairs, 650 based on Foata normal form. 12/4531 useless extension candidates. Maximal degree in co-relation 37727. Up to 3866 conditions per place. [2024-06-04 15:34:40,505 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 262 selfloop transitions, 56 changer transitions 0/323 dead transitions. [2024-06-04 15:34:40,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 323 transitions, 4980 flow [2024-06-04 15:34:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 15:34:40,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-04 15:34:40,507 INFO L175 Difference]: Start difference. First operand has 208 places, 284 transitions, 3912 flow. Second operand 9 states and 177 transitions. [2024-06-04 15:34:40,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 323 transitions, 4980 flow [2024-06-04 15:34:40,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 323 transitions, 4889 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:40,824 INFO L231 Difference]: Finished difference. Result has 213 places, 288 transitions, 4065 flow [2024-06-04 15:34:40,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4065, PETRI_PLACES=213, PETRI_TRANSITIONS=288} [2024-06-04 15:34:40,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-04 15:34:40,824 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 288 transitions, 4065 flow [2024-06-04 15:34:40,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:40,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:40,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:40,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:34:40,825 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:40,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1511425282, now seen corresponding path program 6 times [2024-06-04 15:34:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:40,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558364177] [2024-06-04 15:34:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:42,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:42,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558364177] [2024-06-04 15:34:42,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558364177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:42,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:42,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:42,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738621244] [2024-06-04 15:34:42,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:42,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:42,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:42,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:42,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 288 transitions, 4065 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:42,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:42,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:42,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:43,186 INFO L124 PetriNetUnfolderBase]: 2836/4536 cut-off events. [2024-06-04 15:34:43,186 INFO L125 PetriNetUnfolderBase]: For 263412/263412 co-relation queries the response was YES. [2024-06-04 15:34:43,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37527 conditions, 4536 events. 2836/4536 cut-off events. For 263412/263412 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26865 event pairs, 652 based on Foata normal form. 32/4566 useless extension candidates. Maximal degree in co-relation 37424. Up to 3876 conditions per place. [2024-06-04 15:34:43,234 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 258 selfloop transitions, 64 changer transitions 0/327 dead transitions. [2024-06-04 15:34:43,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 327 transitions, 4903 flow [2024-06-04 15:34:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:34:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:34:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-04 15:34:43,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-06-04 15:34:43,237 INFO L175 Difference]: Start difference. First operand has 213 places, 288 transitions, 4065 flow. Second operand 11 states and 211 transitions. [2024-06-04 15:34:43,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 327 transitions, 4903 flow [2024-06-04 15:34:43,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 327 transitions, 4805 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:43,642 INFO L231 Difference]: Finished difference. Result has 219 places, 289 transitions, 4151 flow [2024-06-04 15:34:43,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4151, PETRI_PLACES=219, PETRI_TRANSITIONS=289} [2024-06-04 15:34:43,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-04 15:34:43,643 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 289 transitions, 4151 flow [2024-06-04 15:34:43,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:43,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:43,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:43,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:34:43,643 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:43,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1263530814, now seen corresponding path program 7 times [2024-06-04 15:34:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:43,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136408707] [2024-06-04 15:34:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136408707] [2024-06-04 15:34:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136408707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:44,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:44,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314186763] [2024-06-04 15:34:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:44,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:44,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:44,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 289 transitions, 4151 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:44,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:44,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:44,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:45,707 INFO L124 PetriNetUnfolderBase]: 2816/4504 cut-off events. [2024-06-04 15:34:45,707 INFO L125 PetriNetUnfolderBase]: For 247767/247767 co-relation queries the response was YES. [2024-06-04 15:34:45,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37127 conditions, 4504 events. 2816/4504 cut-off events. For 247767/247767 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 26602 event pairs, 628 based on Foata normal form. 12/4514 useless extension candidates. Maximal degree in co-relation 37022. Up to 3801 conditions per place. [2024-06-04 15:34:45,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 48 changer transitions 0/322 dead transitions. [2024-06-04 15:34:45,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 322 transitions, 4951 flow [2024-06-04 15:34:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 15:34:45,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-04 15:34:45,753 INFO L175 Difference]: Start difference. First operand has 219 places, 289 transitions, 4151 flow. Second operand 9 states and 177 transitions. [2024-06-04 15:34:45,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 322 transitions, 4951 flow [2024-06-04 15:34:46,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 322 transitions, 4801 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-04 15:34:46,098 INFO L231 Difference]: Finished difference. Result has 218 places, 289 transitions, 4103 flow [2024-06-04 15:34:46,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4103, PETRI_PLACES=218, PETRI_TRANSITIONS=289} [2024-06-04 15:34:46,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 15:34:46,099 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 289 transitions, 4103 flow [2024-06-04 15:34:46,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:34:46,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:46,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:46,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:34:46,100 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:46,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2055724520, now seen corresponding path program 3 times [2024-06-04 15:34:46,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:46,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966807835] [2024-06-04 15:34:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:46,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:46,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966807835] [2024-06-04 15:34:46,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966807835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:46,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:46,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:46,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328314092] [2024-06-04 15:34:46,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:46,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:46,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:46,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:46,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:46,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 289 transitions, 4103 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:46,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:46,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:46,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:47,546 INFO L124 PetriNetUnfolderBase]: 2820/4524 cut-off events. [2024-06-04 15:34:47,547 INFO L125 PetriNetUnfolderBase]: For 248989/248989 co-relation queries the response was YES. [2024-06-04 15:34:47,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37106 conditions, 4524 events. 2820/4524 cut-off events. For 248989/248989 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26839 event pairs, 643 based on Foata normal form. 4/4526 useless extension candidates. Maximal degree in co-relation 37001. Up to 3974 conditions per place. [2024-06-04 15:34:47,594 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 234 selfloop transitions, 77 changer transitions 0/316 dead transitions. [2024-06-04 15:34:47,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 316 transitions, 5100 flow [2024-06-04 15:34:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:34:47,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-04 15:34:47,595 INFO L175 Difference]: Start difference. First operand has 218 places, 289 transitions, 4103 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:34:47,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 316 transitions, 5100 flow [2024-06-04 15:34:48,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 316 transitions, 4905 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-04 15:34:48,081 INFO L231 Difference]: Finished difference. Result has 218 places, 296 transitions, 4209 flow [2024-06-04 15:34:48,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3908, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4209, PETRI_PLACES=218, PETRI_TRANSITIONS=296} [2024-06-04 15:34:48,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 15:34:48,082 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 296 transitions, 4209 flow [2024-06-04 15:34:48,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:48,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:48,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:48,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:34:48,082 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:48,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:48,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2068104680, now seen corresponding path program 4 times [2024-06-04 15:34:48,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:48,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640190718] [2024-06-04 15:34:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:48,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:48,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:48,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640190718] [2024-06-04 15:34:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640190718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:48,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:48,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848779943] [2024-06-04 15:34:48,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:48,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:48,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:48,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 296 transitions, 4209 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:48,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:48,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:48,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:49,614 INFO L124 PetriNetUnfolderBase]: 2772/4451 cut-off events. [2024-06-04 15:34:49,614 INFO L125 PetriNetUnfolderBase]: For 250348/250348 co-relation queries the response was YES. [2024-06-04 15:34:49,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36072 conditions, 4451 events. 2772/4451 cut-off events. For 250348/250348 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26359 event pairs, 774 based on Foata normal form. 12/4462 useless extension candidates. Maximal degree in co-relation 35967. Up to 4121 conditions per place. [2024-06-04 15:34:49,664 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 41 changer transitions 0/315 dead transitions. [2024-06-04 15:34:49,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 315 transitions, 4925 flow [2024-06-04 15:34:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:34:49,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:34:49,665 INFO L175 Difference]: Start difference. First operand has 218 places, 296 transitions, 4209 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:34:49,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 315 transitions, 4925 flow [2024-06-04 15:34:50,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 315 transitions, 4742 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:50,145 INFO L231 Difference]: Finished difference. Result has 223 places, 296 transitions, 4122 flow [2024-06-04 15:34:50,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4122, PETRI_PLACES=223, PETRI_TRANSITIONS=296} [2024-06-04 15:34:50,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 15:34:50,146 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 296 transitions, 4122 flow [2024-06-04 15:34:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:50,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:50,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:50,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:34:50,147 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:50,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 24589486, now seen corresponding path program 5 times [2024-06-04 15:34:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058176195] [2024-06-04 15:34:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:50,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:50,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058176195] [2024-06-04 15:34:50,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058176195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:50,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:50,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:50,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255217677] [2024-06-04 15:34:50,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:50,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:50,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:50,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:50,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 296 transitions, 4122 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:50,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:50,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:50,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:51,557 INFO L124 PetriNetUnfolderBase]: 2786/4488 cut-off events. [2024-06-04 15:34:51,558 INFO L125 PetriNetUnfolderBase]: For 249670/249670 co-relation queries the response was YES. [2024-06-04 15:34:51,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35960 conditions, 4488 events. 2786/4488 cut-off events. For 249670/249670 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 26723 event pairs, 621 based on Foata normal form. 6/4493 useless extension candidates. Maximal degree in co-relation 35854. Up to 4170 conditions per place. [2024-06-04 15:34:51,606 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 271 selfloop transitions, 41 changer transitions 0/317 dead transitions. [2024-06-04 15:34:51,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 317 transitions, 4880 flow [2024-06-04 15:34:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:34:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:34:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-04 15:34:51,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-04 15:34:51,608 INFO L175 Difference]: Start difference. First operand has 223 places, 296 transitions, 4122 flow. Second operand 6 states and 123 transitions. [2024-06-04 15:34:51,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 317 transitions, 4880 flow [2024-06-04 15:34:52,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 317 transitions, 4774 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:52,030 INFO L231 Difference]: Finished difference. Result has 222 places, 299 transitions, 4189 flow [2024-06-04 15:34:52,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4189, PETRI_PLACES=222, PETRI_TRANSITIONS=299} [2024-06-04 15:34:52,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-04 15:34:52,031 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 299 transitions, 4189 flow [2024-06-04 15:34:52,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:52,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:52,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:34:52,031 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:52,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash 31255726, now seen corresponding path program 6 times [2024-06-04 15:34:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003405417] [2024-06-04 15:34:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:52,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:52,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003405417] [2024-06-04 15:34:52,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003405417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:52,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:52,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:52,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294826397] [2024-06-04 15:34:52,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:52,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:52,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:52,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:52,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:52,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 299 transitions, 4189 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:52,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:52,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:52,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:53,520 INFO L124 PetriNetUnfolderBase]: 2738/4425 cut-off events. [2024-06-04 15:34:53,521 INFO L125 PetriNetUnfolderBase]: For 251102/251102 co-relation queries the response was YES. [2024-06-04 15:34:53,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35060 conditions, 4425 events. 2738/4425 cut-off events. For 251102/251102 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 26385 event pairs, 602 based on Foata normal form. 12/4436 useless extension candidates. Maximal degree in co-relation 34953. Up to 3903 conditions per place. [2024-06-04 15:34:53,568 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 249 selfloop transitions, 70 changer transitions 0/324 dead transitions. [2024-06-04 15:34:53,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 324 transitions, 4942 flow [2024-06-04 15:34:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-04 15:34:53,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 15:34:53,569 INFO L175 Difference]: Start difference. First operand has 222 places, 299 transitions, 4189 flow. Second operand 7 states and 147 transitions. [2024-06-04 15:34:53,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 324 transitions, 4942 flow [2024-06-04 15:34:54,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 324 transitions, 4795 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:54,040 INFO L231 Difference]: Finished difference. Result has 226 places, 300 transitions, 4256 flow [2024-06-04 15:34:54,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4256, PETRI_PLACES=226, PETRI_TRANSITIONS=300} [2024-06-04 15:34:54,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-04 15:34:54,041 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 300 transitions, 4256 flow [2024-06-04 15:34:54,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:54,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:54,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:54,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:34:54,042 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:54,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash 969730064, now seen corresponding path program 5 times [2024-06-04 15:34:54,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:54,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006892369] [2024-06-04 15:34:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:54,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:54,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:54,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006892369] [2024-06-04 15:34:54,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006892369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:54,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:54,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:54,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192233624] [2024-06-04 15:34:54,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:54,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:54,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:54,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:54,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:54,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:54,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 300 transitions, 4256 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:54,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:54,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:54,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:55,988 INFO L124 PetriNetUnfolderBase]: 2730/4394 cut-off events. [2024-06-04 15:34:55,989 INFO L125 PetriNetUnfolderBase]: For 246061/246061 co-relation queries the response was YES. [2024-06-04 15:34:56,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35062 conditions, 4394 events. 2730/4394 cut-off events. For 246061/246061 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26060 event pairs, 556 based on Foata normal form. 4/4393 useless extension candidates. Maximal degree in co-relation 34953. Up to 3719 conditions per place. [2024-06-04 15:34:56,031 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 246 selfloop transitions, 71 changer transitions 0/322 dead transitions. [2024-06-04 15:34:56,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 322 transitions, 5008 flow [2024-06-04 15:34:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 15:34:56,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-04 15:34:56,033 INFO L175 Difference]: Start difference. First operand has 226 places, 300 transitions, 4256 flow. Second operand 7 states and 136 transitions. [2024-06-04 15:34:56,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 322 transitions, 5008 flow [2024-06-04 15:34:56,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 322 transitions, 4913 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:56,437 INFO L231 Difference]: Finished difference. Result has 229 places, 302 transitions, 4381 flow [2024-06-04 15:34:56,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4381, PETRI_PLACES=229, PETRI_TRANSITIONS=302} [2024-06-04 15:34:56,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 15:34:56,438 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 302 transitions, 4381 flow [2024-06-04 15:34:56,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:56,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:56,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:56,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:34:56,439 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:56,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1970356474, now seen corresponding path program 1 times [2024-06-04 15:34:56,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:56,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780312557] [2024-06-04 15:34:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:56,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:57,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:57,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780312557] [2024-06-04 15:34:57,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780312557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:57,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:57,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158701136] [2024-06-04 15:34:57,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:57,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:57,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:57,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:57,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 302 transitions, 4381 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:57,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:57,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:57,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:58,166 INFO L124 PetriNetUnfolderBase]: 2748/4429 cut-off events. [2024-06-04 15:34:58,167 INFO L125 PetriNetUnfolderBase]: For 254599/254599 co-relation queries the response was YES. [2024-06-04 15:34:58,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35646 conditions, 4429 events. 2748/4429 cut-off events. For 254599/254599 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26312 event pairs, 613 based on Foata normal form. 2/4428 useless extension candidates. Maximal degree in co-relation 35536. Up to 3983 conditions per place. [2024-06-04 15:34:58,215 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 77 changer transitions 0/359 dead transitions. [2024-06-04 15:34:58,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 359 transitions, 5902 flow [2024-06-04 15:34:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 15:34:58,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-04 15:34:58,217 INFO L175 Difference]: Start difference. First operand has 229 places, 302 transitions, 4381 flow. Second operand 8 states and 156 transitions. [2024-06-04 15:34:58,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 359 transitions, 5902 flow [2024-06-04 15:34:58,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 359 transitions, 5711 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:58,753 INFO L231 Difference]: Finished difference. Result has 233 places, 337 transitions, 4929 flow [2024-06-04 15:34:58,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4196, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4929, PETRI_PLACES=233, PETRI_TRANSITIONS=337} [2024-06-04 15:34:58,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-04 15:34:58,754 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 337 transitions, 4929 flow [2024-06-04 15:34:58,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:58,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:58,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:58,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:34:58,754 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:58,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:58,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2064394693, now seen corresponding path program 1 times [2024-06-04 15:34:58,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:58,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650650803] [2024-06-04 15:34:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:58,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:59,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:59,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650650803] [2024-06-04 15:34:59,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650650803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:59,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:59,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:59,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681305815] [2024-06-04 15:34:59,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:59,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:59,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:59,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:59,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:34:59,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 337 transitions, 4929 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:59,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:59,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:34:59,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:00,555 INFO L124 PetriNetUnfolderBase]: 2866/4586 cut-off events. [2024-06-04 15:35:00,555 INFO L125 PetriNetUnfolderBase]: For 278733/278733 co-relation queries the response was YES. [2024-06-04 15:35:00,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38222 conditions, 4586 events. 2866/4586 cut-off events. For 278733/278733 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27209 event pairs, 600 based on Foata normal form. 6/4589 useless extension candidates. Maximal degree in co-relation 38110. Up to 3696 conditions per place. [2024-06-04 15:35:00,613 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 247 selfloop transitions, 128 changer transitions 0/380 dead transitions. [2024-06-04 15:35:00,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 380 transitions, 6351 flow [2024-06-04 15:35:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-04 15:35:00,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-04 15:35:00,616 INFO L175 Difference]: Start difference. First operand has 233 places, 337 transitions, 4929 flow. Second operand 8 states and 161 transitions. [2024-06-04 15:35:00,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 380 transitions, 6351 flow [2024-06-04 15:35:01,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 380 transitions, 6183 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:01,151 INFO L231 Difference]: Finished difference. Result has 240 places, 355 transitions, 5481 flow [2024-06-04 15:35:01,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5481, PETRI_PLACES=240, PETRI_TRANSITIONS=355} [2024-06-04 15:35:01,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-04 15:35:01,152 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 355 transitions, 5481 flow [2024-06-04 15:35:01,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:01,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:01,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:01,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:35:01,153 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:01,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1970352754, now seen corresponding path program 2 times [2024-06-04 15:35:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:01,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762542795] [2024-06-04 15:35:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:01,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762542795] [2024-06-04 15:35:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762542795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:02,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867883591] [2024-06-04 15:35:02,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:02,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:02,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 355 transitions, 5481 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:02,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:02,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:02,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:03,048 INFO L124 PetriNetUnfolderBase]: 2886/4607 cut-off events. [2024-06-04 15:35:03,048 INFO L125 PetriNetUnfolderBase]: For 291211/291211 co-relation queries the response was YES. [2024-06-04 15:35:03,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40118 conditions, 4607 events. 2886/4607 cut-off events. For 291211/291211 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27254 event pairs, 602 based on Foata normal form. 4/4605 useless extension candidates. Maximal degree in co-relation 40002. Up to 3954 conditions per place. [2024-06-04 15:35:03,106 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 148 changer transitions 0/390 dead transitions. [2024-06-04 15:35:03,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 390 transitions, 6838 flow [2024-06-04 15:35:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 15:35:03,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-04 15:35:03,107 INFO L175 Difference]: Start difference. First operand has 240 places, 355 transitions, 5481 flow. Second operand 8 states and 157 transitions. [2024-06-04 15:35:03,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 390 transitions, 6838 flow [2024-06-04 15:35:03,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 390 transitions, 6680 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:03,835 INFO L231 Difference]: Finished difference. Result has 248 places, 371 transitions, 6060 flow [2024-06-04 15:35:03,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5353, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=248, PETRI_TRANSITIONS=371} [2024-06-04 15:35:03,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-04 15:35:03,835 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 371 transitions, 6060 flow [2024-06-04 15:35:03,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:03,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:03,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:35:03,836 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:03,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2068113763, now seen corresponding path program 2 times [2024-06-04 15:35:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:03,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67301869] [2024-06-04 15:35:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:04,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:04,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67301869] [2024-06-04 15:35:04,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67301869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:04,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:04,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:04,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579773549] [2024-06-04 15:35:04,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:04,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:04,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:04,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:04,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 371 transitions, 6060 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:04,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:04,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:04,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:05,626 INFO L124 PetriNetUnfolderBase]: 3012/4796 cut-off events. [2024-06-04 15:35:05,626 INFO L125 PetriNetUnfolderBase]: For 330499/330499 co-relation queries the response was YES. [2024-06-04 15:35:05,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42801 conditions, 4796 events. 3012/4796 cut-off events. For 330499/330499 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28584 event pairs, 764 based on Foata normal form. 6/4801 useless extension candidates. Maximal degree in co-relation 42680. Up to 4347 conditions per place. [2024-06-04 15:35:05,685 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 347 selfloop transitions, 56 changer transitions 0/408 dead transitions. [2024-06-04 15:35:05,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 408 transitions, 7513 flow [2024-06-04 15:35:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:35:05,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:35:05,687 INFO L175 Difference]: Start difference. First operand has 248 places, 371 transitions, 6060 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:35:05,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 408 transitions, 7513 flow [2024-06-04 15:35:06,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 408 transitions, 7325 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:06,473 INFO L231 Difference]: Finished difference. Result has 255 places, 382 transitions, 6279 flow [2024-06-04 15:35:06,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6279, PETRI_PLACES=255, PETRI_TRANSITIONS=382} [2024-06-04 15:35:06,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-04 15:35:06,474 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 382 transitions, 6279 flow [2024-06-04 15:35:06,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:06,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:06,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:06,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:35:06,475 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:06,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2068113608, now seen corresponding path program 3 times [2024-06-04 15:35:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:06,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041512724] [2024-06-04 15:35:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:06,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041512724] [2024-06-04 15:35:07,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041512724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:07,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:07,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:07,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221678918] [2024-06-04 15:35:07,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:07,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:07,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:07,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:07,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:07,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 382 transitions, 6279 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:07,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:07,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:07,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:08,521 INFO L124 PetriNetUnfolderBase]: 3057/4857 cut-off events. [2024-06-04 15:35:08,521 INFO L125 PetriNetUnfolderBase]: For 336555/336555 co-relation queries the response was YES. [2024-06-04 15:35:08,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43651 conditions, 4857 events. 3057/4857 cut-off events. For 336555/336555 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 28887 event pairs, 785 based on Foata normal form. 9/4865 useless extension candidates. Maximal degree in co-relation 43528. Up to 4483 conditions per place. [2024-06-04 15:35:08,579 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 353 selfloop transitions, 57 changer transitions 0/415 dead transitions. [2024-06-04 15:35:08,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 415 transitions, 7439 flow [2024-06-04 15:35:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:35:08,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-04 15:35:08,580 INFO L175 Difference]: Start difference. First operand has 255 places, 382 transitions, 6279 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:35:08,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 415 transitions, 7439 flow [2024-06-04 15:35:09,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 415 transitions, 7312 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:09,326 INFO L231 Difference]: Finished difference. Result has 260 places, 392 transitions, 6485 flow [2024-06-04 15:35:09,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6485, PETRI_PLACES=260, PETRI_TRANSITIONS=392} [2024-06-04 15:35:09,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-04 15:35:09,327 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 392 transitions, 6485 flow [2024-06-04 15:35:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:09,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:09,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:35:09,328 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:09,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1641241814, now seen corresponding path program 1 times [2024-06-04 15:35:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:09,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893521990] [2024-06-04 15:35:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893521990] [2024-06-04 15:35:10,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893521990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:10,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:10,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:10,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684093854] [2024-06-04 15:35:10,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:10,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:10,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:10,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:10,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 392 transitions, 6485 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:10,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:10,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:10,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:11,071 INFO L124 PetriNetUnfolderBase]: 3054/4849 cut-off events. [2024-06-04 15:35:11,071 INFO L125 PetriNetUnfolderBase]: For 334987/334987 co-relation queries the response was YES. [2024-06-04 15:35:11,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44331 conditions, 4849 events. 3054/4849 cut-off events. For 334987/334987 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28814 event pairs, 774 based on Foata normal form. 1/4849 useless extension candidates. Maximal degree in co-relation 44206. Up to 4589 conditions per place. [2024-06-04 15:35:11,133 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 371 selfloop transitions, 30 changer transitions 0/406 dead transitions. [2024-06-04 15:35:11,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 406 transitions, 7383 flow [2024-06-04 15:35:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:35:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:35:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-04 15:35:11,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-04 15:35:11,135 INFO L175 Difference]: Start difference. First operand has 260 places, 392 transitions, 6485 flow. Second operand 5 states and 101 transitions. [2024-06-04 15:35:11,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 406 transitions, 7383 flow [2024-06-04 15:35:12,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 406 transitions, 7153 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:12,116 INFO L231 Difference]: Finished difference. Result has 259 places, 395 transitions, 6403 flow [2024-06-04 15:35:12,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6403, PETRI_PLACES=259, PETRI_TRANSITIONS=395} [2024-06-04 15:35:12,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-04 15:35:12,117 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 395 transitions, 6403 flow [2024-06-04 15:35:12,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:12,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:12,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:12,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:35:12,117 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:12,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1641451281, now seen corresponding path program 3 times [2024-06-04 15:35:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:12,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798671117] [2024-06-04 15:35:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:12,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798671117] [2024-06-04 15:35:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798671117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:12,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569643918] [2024-06-04 15:35:12,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:12,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:12,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:12,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 395 transitions, 6403 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:12,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:12,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:12,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:13,858 INFO L124 PetriNetUnfolderBase]: 3156/5005 cut-off events. [2024-06-04 15:35:13,858 INFO L125 PetriNetUnfolderBase]: For 364404/364404 co-relation queries the response was YES. [2024-06-04 15:35:13,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46231 conditions, 5005 events. 3156/5005 cut-off events. For 364404/364404 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29906 event pairs, 774 based on Foata normal form. 6/5010 useless extension candidates. Maximal degree in co-relation 46105. Up to 4593 conditions per place. [2024-06-04 15:35:13,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 43 changer transitions 0/423 dead transitions. [2024-06-04 15:35:13,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 423 transitions, 7668 flow [2024-06-04 15:35:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:35:13,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-04 15:35:13,925 INFO L175 Difference]: Start difference. First operand has 259 places, 395 transitions, 6403 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:35:13,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 423 transitions, 7668 flow [2024-06-04 15:35:14,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 423 transitions, 7596 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:14,798 INFO L231 Difference]: Finished difference. Result has 265 places, 403 transitions, 6658 flow [2024-06-04 15:35:14,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6658, PETRI_PLACES=265, PETRI_TRANSITIONS=403} [2024-06-04 15:35:14,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-04 15:35:14,799 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 403 transitions, 6658 flow [2024-06-04 15:35:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:14,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:14,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:14,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:35:14,799 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:14,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash 31264809, now seen corresponding path program 4 times [2024-06-04 15:35:14,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:14,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045102102] [2024-06-04 15:35:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:15,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045102102] [2024-06-04 15:35:15,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045102102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:15,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:15,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:15,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122524883] [2024-06-04 15:35:15,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:15,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:15,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:15,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 403 transitions, 6658 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:15,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:15,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:15,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:16,629 INFO L124 PetriNetUnfolderBase]: 3266/5181 cut-off events. [2024-06-04 15:35:16,630 INFO L125 PetriNetUnfolderBase]: For 396843/396843 co-relation queries the response was YES. [2024-06-04 15:35:16,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49001 conditions, 5181 events. 3266/5181 cut-off events. For 396843/396843 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31188 event pairs, 651 based on Foata normal form. 6/5186 useless extension candidates. Maximal degree in co-relation 48873. Up to 4429 conditions per place. [2024-06-04 15:35:16,697 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 340 selfloop transitions, 101 changer transitions 0/446 dead transitions. [2024-06-04 15:35:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 446 transitions, 8250 flow [2024-06-04 15:35:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-04 15:35:16,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-04 15:35:16,704 INFO L175 Difference]: Start difference. First operand has 265 places, 403 transitions, 6658 flow. Second operand 8 states and 166 transitions. [2024-06-04 15:35:16,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 446 transitions, 8250 flow [2024-06-04 15:35:17,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 446 transitions, 7991 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:17,659 INFO L231 Difference]: Finished difference. Result has 269 places, 415 transitions, 6995 flow [2024-06-04 15:35:17,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6995, PETRI_PLACES=269, PETRI_TRANSITIONS=415} [2024-06-04 15:35:17,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-04 15:35:17,660 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 415 transitions, 6995 flow [2024-06-04 15:35:17,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:17,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:17,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:17,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:35:17,660 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:17,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash 31264654, now seen corresponding path program 4 times [2024-06-04 15:35:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990203024] [2024-06-04 15:35:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:18,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990203024] [2024-06-04 15:35:18,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990203024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:18,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:18,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670909219] [2024-06-04 15:35:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:18,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:18,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 415 transitions, 6995 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:18,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:18,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:18,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:19,672 INFO L124 PetriNetUnfolderBase]: 3316/5250 cut-off events. [2024-06-04 15:35:19,672 INFO L125 PetriNetUnfolderBase]: For 411733/411733 co-relation queries the response was YES. [2024-06-04 15:35:19,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50000 conditions, 5250 events. 3316/5250 cut-off events. For 411733/411733 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31615 event pairs, 678 based on Foata normal form. 6/5255 useless extension candidates. Maximal degree in co-relation 49872. Up to 4743 conditions per place. [2024-06-04 15:35:19,743 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 378 selfloop transitions, 88 changer transitions 0/471 dead transitions. [2024-06-04 15:35:19,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 471 transitions, 8750 flow [2024-06-04 15:35:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-04 15:35:19,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-04 15:35:19,745 INFO L175 Difference]: Start difference. First operand has 269 places, 415 transitions, 6995 flow. Second operand 8 states and 170 transitions. [2024-06-04 15:35:19,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 471 transitions, 8750 flow [2024-06-04 15:35:20,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 471 transitions, 8611 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:20,971 INFO L231 Difference]: Finished difference. Result has 278 places, 442 transitions, 7676 flow [2024-06-04 15:35:20,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7676, PETRI_PLACES=278, PETRI_TRANSITIONS=442} [2024-06-04 15:35:20,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-04 15:35:20,973 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 442 transitions, 7676 flow [2024-06-04 15:35:20,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:20,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:20,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:20,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:35:20,974 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:20,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash 541470674, now seen corresponding path program 1 times [2024-06-04 15:35:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:20,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485626239] [2024-06-04 15:35:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:20,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:22,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485626239] [2024-06-04 15:35:22,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485626239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:22,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:22,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:22,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704860212] [2024-06-04 15:35:22,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:22,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:22,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:22,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 442 transitions, 7676 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:22,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:22,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:22,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:23,432 INFO L124 PetriNetUnfolderBase]: 3296/5235 cut-off events. [2024-06-04 15:35:23,432 INFO L125 PetriNetUnfolderBase]: For 418583/418583 co-relation queries the response was YES. [2024-06-04 15:35:23,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50295 conditions, 5235 events. 3296/5235 cut-off events. For 418583/418583 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31646 event pairs, 650 based on Foata normal form. 12/5245 useless extension candidates. Maximal degree in co-relation 50162. Up to 4629 conditions per place. [2024-06-04 15:35:23,507 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 43 changer transitions 0/473 dead transitions. [2024-06-04 15:35:23,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 473 transitions, 8722 flow [2024-06-04 15:35:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:35:23,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-04 15:35:23,509 INFO L175 Difference]: Start difference. First operand has 278 places, 442 transitions, 7676 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:35:23,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 473 transitions, 8722 flow [2024-06-04 15:35:24,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 473 transitions, 8571 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:24,856 INFO L231 Difference]: Finished difference. Result has 285 places, 442 transitions, 7617 flow [2024-06-04 15:35:24,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7525, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7617, PETRI_PLACES=285, PETRI_TRANSITIONS=442} [2024-06-04 15:35:24,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-04 15:35:24,857 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 442 transitions, 7617 flow [2024-06-04 15:35:24,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:24,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:24,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:24,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:35:24,858 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:24,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:24,858 INFO L85 PathProgramCache]: Analyzing trace with hash -92605780, now seen corresponding path program 2 times [2024-06-04 15:35:24,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:24,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422327617] [2024-06-04 15:35:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:24,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422327617] [2024-06-04 15:35:25,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422327617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:25,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:25,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:25,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755666585] [2024-06-04 15:35:25,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:25,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:25,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:26,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:26,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 442 transitions, 7617 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:26,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:26,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:26,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:27,389 INFO L124 PetriNetUnfolderBase]: 3337/5296 cut-off events. [2024-06-04 15:35:27,389 INFO L125 PetriNetUnfolderBase]: For 431803/431803 co-relation queries the response was YES. [2024-06-04 15:35:27,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50888 conditions, 5296 events. 3337/5296 cut-off events. For 431803/431803 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32075 event pairs, 658 based on Foata normal form. 12/5303 useless extension candidates. Maximal degree in co-relation 50753. Up to 4744 conditions per place. [2024-06-04 15:35:27,459 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 54 changer transitions 0/469 dead transitions. [2024-06-04 15:35:27,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 469 transitions, 8683 flow [2024-06-04 15:35:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 15:35:27,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-04 15:35:27,461 INFO L175 Difference]: Start difference. First operand has 285 places, 442 transitions, 7617 flow. Second operand 8 states and 155 transitions. [2024-06-04 15:35:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 469 transitions, 8683 flow [2024-06-04 15:35:28,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 469 transitions, 8534 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:28,478 INFO L231 Difference]: Finished difference. Result has 285 places, 443 transitions, 7627 flow [2024-06-04 15:35:28,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7468, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7627, PETRI_PLACES=285, PETRI_TRANSITIONS=443} [2024-06-04 15:35:28,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-04 15:35:28,478 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 443 transitions, 7627 flow [2024-06-04 15:35:28,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:28,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:28,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:28,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:35:28,479 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:28,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1636741732, now seen corresponding path program 3 times [2024-06-04 15:35:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:28,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174678932] [2024-06-04 15:35:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:29,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:29,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174678932] [2024-06-04 15:35:29,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174678932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:29,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:29,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:29,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439276296] [2024-06-04 15:35:29,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:29,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:29,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:29,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:29,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:29,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:29,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 443 transitions, 7627 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:29,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:29,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:29,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:30,901 INFO L124 PetriNetUnfolderBase]: 3378/5357 cut-off events. [2024-06-04 15:35:30,902 INFO L125 PetriNetUnfolderBase]: For 444221/444221 co-relation queries the response was YES. [2024-06-04 15:35:30,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51350 conditions, 5357 events. 3378/5357 cut-off events. For 444221/444221 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 32500 event pairs, 656 based on Foata normal form. 12/5364 useless extension candidates. Maximal degree in co-relation 51215. Up to 4733 conditions per place. [2024-06-04 15:35:30,980 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 56 changer transitions 0/471 dead transitions. [2024-06-04 15:35:30,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 471 transitions, 8701 flow [2024-06-04 15:35:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:35:30,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:35:30,981 INFO L175 Difference]: Start difference. First operand has 285 places, 443 transitions, 7627 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:35:30,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 471 transitions, 8701 flow [2024-06-04 15:35:32,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 471 transitions, 8585 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:32,301 INFO L231 Difference]: Finished difference. Result has 288 places, 444 transitions, 7676 flow [2024-06-04 15:35:32,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7676, PETRI_PLACES=288, PETRI_TRANSITIONS=444} [2024-06-04 15:35:32,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-04 15:35:32,302 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 444 transitions, 7676 flow [2024-06-04 15:35:32,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:32,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:32,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:32,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:35:32,303 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:32,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1821676184, now seen corresponding path program 4 times [2024-06-04 15:35:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:32,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540641426] [2024-06-04 15:35:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:33,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540641426] [2024-06-04 15:35:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540641426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:33,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:33,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:33,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563678421] [2024-06-04 15:35:33,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:33,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:33,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:33,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:33,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 444 transitions, 7676 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:33,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:33,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:33,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:34,821 INFO L124 PetriNetUnfolderBase]: 3358/5325 cut-off events. [2024-06-04 15:35:34,821 INFO L125 PetriNetUnfolderBase]: For 429695/429695 co-relation queries the response was YES. [2024-06-04 15:35:34,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50450 conditions, 5325 events. 3358/5325 cut-off events. For 429695/429695 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32282 event pairs, 557 based on Foata normal form. 12/5332 useless extension candidates. Maximal degree in co-relation 50315. Up to 4858 conditions per place. [2024-06-04 15:35:34,887 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 30 changer transitions 0/471 dead transitions. [2024-06-04 15:35:34,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 471 transitions, 8634 flow [2024-06-04 15:35:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:35:34,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-04 15:35:34,889 INFO L175 Difference]: Start difference. First operand has 288 places, 444 transitions, 7676 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:35:34,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 471 transitions, 8634 flow [2024-06-04 15:35:35,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 471 transitions, 8453 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:35,998 INFO L231 Difference]: Finished difference. Result has 287 places, 443 transitions, 7485 flow [2024-06-04 15:35:35,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7485, PETRI_PLACES=287, PETRI_TRANSITIONS=443} [2024-06-04 15:35:35,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-04 15:35:35,999 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 443 transitions, 7485 flow [2024-06-04 15:35:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-04 15:35:36,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:36,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:36,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:35:36,000 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:36,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1853536859, now seen corresponding path program 1 times [2024-06-04 15:35:36,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:36,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318270027] [2024-06-04 15:35:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:36,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:36,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318270027] [2024-06-04 15:35:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318270027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:36,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:36,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:36,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039479417] [2024-06-04 15:35:36,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:36,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:36,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:36,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:36,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:36,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 443 transitions, 7485 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:36,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:36,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:36,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:38,074 INFO L124 PetriNetUnfolderBase]: 3442/5467 cut-off events. [2024-06-04 15:35:38,075 INFO L125 PetriNetUnfolderBase]: For 417456/417456 co-relation queries the response was YES. [2024-06-04 15:35:38,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51488 conditions, 5467 events. 3442/5467 cut-off events. For 417456/417456 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 33388 event pairs, 712 based on Foata normal form. 4/5470 useless extension candidates. Maximal degree in co-relation 51354. Up to 4984 conditions per place. [2024-06-04 15:35:38,146 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 68 changer transitions 0/479 dead transitions. [2024-06-04 15:35:38,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 479 transitions, 9012 flow [2024-06-04 15:35:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:35:38,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:35:38,148 INFO L175 Difference]: Start difference. First operand has 287 places, 443 transitions, 7485 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:35:38,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 479 transitions, 9012 flow [2024-06-04 15:35:39,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 479 transitions, 8829 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:39,182 INFO L231 Difference]: Finished difference. Result has 288 places, 452 transitions, 7752 flow [2024-06-04 15:35:39,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7302, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7752, PETRI_PLACES=288, PETRI_TRANSITIONS=452} [2024-06-04 15:35:39,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-04 15:35:39,183 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 452 transitions, 7752 flow [2024-06-04 15:35:39,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:39,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:39,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:39,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:35:39,183 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:39,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2049344609, now seen corresponding path program 1 times [2024-06-04 15:35:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:39,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730007241] [2024-06-04 15:35:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:39,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:39,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730007241] [2024-06-04 15:35:39,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730007241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:39,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:39,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:39,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306828049] [2024-06-04 15:35:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:39,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:39,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:39,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 452 transitions, 7752 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:39,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:39,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:39,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:41,385 INFO L124 PetriNetUnfolderBase]: 3452/5476 cut-off events. [2024-06-04 15:35:41,385 INFO L125 PetriNetUnfolderBase]: For 423286/423286 co-relation queries the response was YES. [2024-06-04 15:35:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51462 conditions, 5476 events. 3452/5476 cut-off events. For 423286/423286 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 33409 event pairs, 714 based on Foata normal form. 2/5477 useless extension candidates. Maximal degree in co-relation 51328. Up to 5094 conditions per place. [2024-06-04 15:35:41,461 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 54 changer transitions 0/479 dead transitions. [2024-06-04 15:35:41,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 479 transitions, 8933 flow [2024-06-04 15:35:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:35:41,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:35:41,462 INFO L175 Difference]: Start difference. First operand has 288 places, 452 transitions, 7752 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:35:41,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 479 transitions, 8933 flow [2024-06-04 15:35:42,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 479 transitions, 8787 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:42,668 INFO L231 Difference]: Finished difference. Result has 292 places, 457 transitions, 7837 flow [2024-06-04 15:35:42,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7606, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7837, PETRI_PLACES=292, PETRI_TRANSITIONS=457} [2024-06-04 15:35:42,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-04 15:35:42,669 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 457 transitions, 7837 flow [2024-06-04 15:35:42,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:42,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:42,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:42,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:35:42,669 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:42,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash 747316983, now seen corresponding path program 2 times [2024-06-04 15:35:42,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:42,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181637513] [2024-06-04 15:35:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:43,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:43,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181637513] [2024-06-04 15:35:43,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181637513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:43,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:43,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483191441] [2024-06-04 15:35:43,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:43,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:43,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:43,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:43,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 457 transitions, 7837 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:43,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:43,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:43,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:44,648 INFO L124 PetriNetUnfolderBase]: 3472/5492 cut-off events. [2024-06-04 15:35:44,648 INFO L125 PetriNetUnfolderBase]: For 439653/439653 co-relation queries the response was YES. [2024-06-04 15:35:44,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51838 conditions, 5492 events. 3472/5492 cut-off events. For 439653/439653 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 33448 event pairs, 695 based on Foata normal form. 4/5495 useless extension candidates. Maximal degree in co-relation 51703. Up to 5161 conditions per place. [2024-06-04 15:35:44,722 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 42 changer transitions 0/477 dead transitions. [2024-06-04 15:35:44,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 477 transitions, 8935 flow [2024-06-04 15:35:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 15:35:44,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-04 15:35:44,723 INFO L175 Difference]: Start difference. First operand has 292 places, 457 transitions, 7837 flow. Second operand 8 states and 145 transitions. [2024-06-04 15:35:44,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 477 transitions, 8935 flow [2024-06-04 15:35:46,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 477 transitions, 8822 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:46,048 INFO L231 Difference]: Finished difference. Result has 296 places, 460 transitions, 7900 flow [2024-06-04 15:35:46,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7900, PETRI_PLACES=296, PETRI_TRANSITIONS=460} [2024-06-04 15:35:46,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-04 15:35:46,049 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 460 transitions, 7900 flow [2024-06-04 15:35:46,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:46,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:46,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:46,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:35:46,051 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:46,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash 747079647, now seen corresponding path program 2 times [2024-06-04 15:35:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:46,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127740609] [2024-06-04 15:35:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:46,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:46,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127740609] [2024-06-04 15:35:46,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127740609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:46,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:46,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:46,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856266434] [2024-06-04 15:35:46,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:46,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:46,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:46,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 460 transitions, 7900 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:46,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:46,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:46,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:48,027 INFO L124 PetriNetUnfolderBase]: 3482/5508 cut-off events. [2024-06-04 15:35:48,027 INFO L125 PetriNetUnfolderBase]: For 448828/448828 co-relation queries the response was YES. [2024-06-04 15:35:48,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52178 conditions, 5508 events. 3482/5508 cut-off events. For 448828/448828 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33572 event pairs, 696 based on Foata normal form. 2/5509 useless extension candidates. Maximal degree in co-relation 52041. Up to 5193 conditions per place. [2024-06-04 15:35:48,101 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 37 changer transitions 0/482 dead transitions. [2024-06-04 15:35:48,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 482 transitions, 9048 flow [2024-06-04 15:35:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:35:48,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 15:35:48,102 INFO L175 Difference]: Start difference. First operand has 296 places, 460 transitions, 7900 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:35:48,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 482 transitions, 9048 flow [2024-06-04 15:35:49,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 482 transitions, 8866 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 15:35:49,477 INFO L231 Difference]: Finished difference. Result has 297 places, 465 transitions, 7925 flow [2024-06-04 15:35:49,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7718, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7925, PETRI_PLACES=297, PETRI_TRANSITIONS=465} [2024-06-04 15:35:49,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-04 15:35:49,478 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 465 transitions, 7925 flow [2024-06-04 15:35:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:49,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:49,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:35:49,478 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 462756279, now seen corresponding path program 3 times [2024-06-04 15:35:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744507719] [2024-06-04 15:35:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:49,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:50,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:50,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744507719] [2024-06-04 15:35:50,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744507719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:50,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:50,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:50,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986279514] [2024-06-04 15:35:50,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:50,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:50,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:50,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:50,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 465 transitions, 7925 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:50,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:50,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:50,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:51,490 INFO L124 PetriNetUnfolderBase]: 3470/5500 cut-off events. [2024-06-04 15:35:51,490 INFO L125 PetriNetUnfolderBase]: For 452001/452001 co-relation queries the response was YES. [2024-06-04 15:35:51,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51720 conditions, 5500 events. 3470/5500 cut-off events. For 452001/452001 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33525 event pairs, 695 based on Foata normal form. 4/5503 useless extension candidates. Maximal degree in co-relation 51583. Up to 5133 conditions per place. [2024-06-04 15:35:51,560 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 47 changer transitions 0/485 dead transitions. [2024-06-04 15:35:51,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 485 transitions, 9014 flow [2024-06-04 15:35:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:35:51,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-04 15:35:51,563 INFO L175 Difference]: Start difference. First operand has 297 places, 465 transitions, 7925 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:35:51,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 485 transitions, 9014 flow [2024-06-04 15:35:53,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 485 transitions, 8906 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:53,067 INFO L231 Difference]: Finished difference. Result has 300 places, 465 transitions, 7918 flow [2024-06-04 15:35:53,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7817, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7918, PETRI_PLACES=300, PETRI_TRANSITIONS=465} [2024-06-04 15:35:53,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-04 15:35:53,068 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 465 transitions, 7918 flow [2024-06-04 15:35:53,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:53,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:53,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:53,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:35:53,068 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:53,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 463002357, now seen corresponding path program 1 times [2024-06-04 15:35:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:53,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247515932] [2024-06-04 15:35:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247515932] [2024-06-04 15:35:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247515932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:54,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:54,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252911376] [2024-06-04 15:35:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:54,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:54,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 465 transitions, 7918 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:35:54,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:54,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:54,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:55,612 INFO L124 PetriNetUnfolderBase]: 3514/5559 cut-off events. [2024-06-04 15:35:55,613 INFO L125 PetriNetUnfolderBase]: For 480504/480504 co-relation queries the response was YES. [2024-06-04 15:35:55,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52379 conditions, 5559 events. 3514/5559 cut-off events. For 480504/480504 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33821 event pairs, 679 based on Foata normal form. 12/5570 useless extension candidates. Maximal degree in co-relation 52241. Up to 5053 conditions per place. [2024-06-04 15:35:55,690 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 414 selfloop transitions, 72 changer transitions 0/491 dead transitions. [2024-06-04 15:35:55,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 491 transitions, 9106 flow [2024-06-04 15:35:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:35:55,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:35:55,691 INFO L175 Difference]: Start difference. First operand has 300 places, 465 transitions, 7918 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:35:55,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 491 transitions, 9106 flow [2024-06-04 15:35:57,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 491 transitions, 8961 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:57,126 INFO L231 Difference]: Finished difference. Result has 302 places, 466 transitions, 7944 flow [2024-06-04 15:35:57,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7773, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7944, PETRI_PLACES=302, PETRI_TRANSITIONS=466} [2024-06-04 15:35:57,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-04 15:35:57,127 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 466 transitions, 7944 flow [2024-06-04 15:35:57,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:35:57,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:57,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:57,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:35:57,128 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:57,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash -428287295, now seen corresponding path program 3 times [2024-06-04 15:35:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:57,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095216963] [2024-06-04 15:35:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:57,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:57,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:57,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095216963] [2024-06-04 15:35:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095216963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:57,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972696534] [2024-06-04 15:35:57,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:57,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:57,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:35:57,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 466 transitions, 7944 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:57,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:57,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:35:57,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:59,191 INFO L124 PetriNetUnfolderBase]: 3508/5548 cut-off events. [2024-06-04 15:35:59,191 INFO L125 PetriNetUnfolderBase]: For 469762/469762 co-relation queries the response was YES. [2024-06-04 15:35:59,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52361 conditions, 5548 events. 3508/5548 cut-off events. For 469762/469762 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 33749 event pairs, 712 based on Foata normal form. 2/5548 useless extension candidates. Maximal degree in co-relation 52222. Up to 4975 conditions per place. [2024-06-04 15:35:59,267 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 117 changer transitions 0/485 dead transitions. [2024-06-04 15:35:59,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 485 transitions, 9120 flow [2024-06-04 15:35:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:35:59,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:35:59,269 INFO L175 Difference]: Start difference. First operand has 302 places, 466 transitions, 7944 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:35:59,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 485 transitions, 9120 flow [2024-06-04 15:36:00,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 485 transitions, 8919 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:00,777 INFO L231 Difference]: Finished difference. Result has 304 places, 466 transitions, 7995 flow [2024-06-04 15:36:00,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7753, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7995, PETRI_PLACES=304, PETRI_TRANSITIONS=466} [2024-06-04 15:36:00,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-04 15:36:00,779 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 466 transitions, 7995 flow [2024-06-04 15:36:00,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:00,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:00,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:00,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:36:00,780 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:00,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1727350763, now seen corresponding path program 4 times [2024-06-04 15:36:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:00,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413011598] [2024-06-04 15:36:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:00,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:01,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:01,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413011598] [2024-06-04 15:36:01,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413011598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:01,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:01,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:01,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715699134] [2024-06-04 15:36:01,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:01,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:01,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:01,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:01,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 466 transitions, 7995 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:01,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:01,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:01,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:02,724 INFO L124 PetriNetUnfolderBase]: 3516/5604 cut-off events. [2024-06-04 15:36:02,724 INFO L125 PetriNetUnfolderBase]: For 485135/485135 co-relation queries the response was YES. [2024-06-04 15:36:02,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52462 conditions, 5604 events. 3516/5604 cut-off events. For 485135/485135 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34489 event pairs, 670 based on Foata normal form. 8/5610 useless extension candidates. Maximal degree in co-relation 52322. Up to 4277 conditions per place. [2024-06-04 15:36:02,804 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 323 selfloop transitions, 171 changer transitions 0/499 dead transitions. [2024-06-04 15:36:02,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 499 transitions, 9593 flow [2024-06-04 15:36:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 15:36:02,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:36:02,806 INFO L175 Difference]: Start difference. First operand has 304 places, 466 transitions, 7995 flow. Second operand 8 states and 160 transitions. [2024-06-04 15:36:02,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 499 transitions, 9593 flow [2024-06-04 15:36:04,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 499 transitions, 9375 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:04,310 INFO L231 Difference]: Finished difference. Result has 307 places, 469 transitions, 8218 flow [2024-06-04 15:36:04,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7777, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8218, PETRI_PLACES=307, PETRI_TRANSITIONS=469} [2024-06-04 15:36:04,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 15:36:04,311 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 469 transitions, 8218 flow [2024-06-04 15:36:04,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:04,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:04,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:04,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:36:04,311 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:04,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash -697047995, now seen corresponding path program 4 times [2024-06-04 15:36:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:04,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109287990] [2024-06-04 15:36:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:04,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109287990] [2024-06-04 15:36:04,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109287990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:04,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:04,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:04,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004349351] [2024-06-04 15:36:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:04,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:05,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:05,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 469 transitions, 8218 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:05,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:05,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:05,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:06,344 INFO L124 PetriNetUnfolderBase]: 3510/5572 cut-off events. [2024-06-04 15:36:06,345 INFO L125 PetriNetUnfolderBase]: For 483327/483327 co-relation queries the response was YES. [2024-06-04 15:36:06,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52897 conditions, 5572 events. 3510/5572 cut-off events. For 483327/483327 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34100 event pairs, 734 based on Foata normal form. 2/5572 useless extension candidates. Maximal degree in co-relation 52756. Up to 4982 conditions per place. [2024-06-04 15:36:06,422 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 377 selfloop transitions, 107 changer transitions 0/489 dead transitions. [2024-06-04 15:36:06,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 489 transitions, 9279 flow [2024-06-04 15:36:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:36:06,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-04 15:36:06,424 INFO L175 Difference]: Start difference. First operand has 307 places, 469 transitions, 8218 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:36:06,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 489 transitions, 9279 flow [2024-06-04 15:36:08,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 489 transitions, 8634 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-04 15:36:08,020 INFO L231 Difference]: Finished difference. Result has 307 places, 469 transitions, 7806 flow [2024-06-04 15:36:08,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7583, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7806, PETRI_PLACES=307, PETRI_TRANSITIONS=469} [2024-06-04 15:36:08,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 15:36:08,021 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 469 transitions, 7806 flow [2024-06-04 15:36:08,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:08,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:08,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:36:08,022 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:08,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash -836377317, now seen corresponding path program 5 times [2024-06-04 15:36:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:08,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583014770] [2024-06-04 15:36:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:08,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:08,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583014770] [2024-06-04 15:36:08,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583014770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:08,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:08,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549929818] [2024-06-04 15:36:08,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:08,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:08,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:08,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 469 transitions, 7806 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:08,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:08,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:08,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:10,218 INFO L124 PetriNetUnfolderBase]: 3518/5577 cut-off events. [2024-06-04 15:36:10,218 INFO L125 PetriNetUnfolderBase]: For 493588/493588 co-relation queries the response was YES. [2024-06-04 15:36:10,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51565 conditions, 5577 events. 3518/5577 cut-off events. For 493588/493588 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34175 event pairs, 842 based on Foata normal form. 8/5584 useless extension candidates. Maximal degree in co-relation 51425. Up to 5080 conditions per place. [2024-06-04 15:36:10,297 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 59 changer transitions 0/498 dead transitions. [2024-06-04 15:36:10,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 498 transitions, 9306 flow [2024-06-04 15:36:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:36:10,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-04 15:36:10,299 INFO L175 Difference]: Start difference. First operand has 307 places, 469 transitions, 7806 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:36:10,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 498 transitions, 9306 flow [2024-06-04 15:36:11,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 498 transitions, 9024 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:11,953 INFO L231 Difference]: Finished difference. Result has 310 places, 472 transitions, 7714 flow [2024-06-04 15:36:11,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7524, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7714, PETRI_PLACES=310, PETRI_TRANSITIONS=472} [2024-06-04 15:36:11,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-04 15:36:11,954 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 472 transitions, 7714 flow [2024-06-04 15:36:11,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:11,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:11,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:11,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:36:11,954 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:11,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:11,955 INFO L85 PathProgramCache]: Analyzing trace with hash 762512727, now seen corresponding path program 6 times [2024-06-04 15:36:11,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:11,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044399674] [2024-06-04 15:36:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:11,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:12,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:12,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044399674] [2024-06-04 15:36:12,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044399674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:12,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:12,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:12,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509477282] [2024-06-04 15:36:12,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:12,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:12,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:12,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:12,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:12,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 472 transitions, 7714 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:12,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:12,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:12,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:13,996 INFO L124 PetriNetUnfolderBase]: 3538/5608 cut-off events. [2024-06-04 15:36:13,996 INFO L125 PetriNetUnfolderBase]: For 493260/493260 co-relation queries the response was YES. [2024-06-04 15:36:14,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51966 conditions, 5608 events. 3538/5608 cut-off events. For 493260/493260 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34341 event pairs, 704 based on Foata normal form. 4/5611 useless extension candidates. Maximal degree in co-relation 51825. Up to 5285 conditions per place. [2024-06-04 15:36:14,074 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 31 changer transitions 0/491 dead transitions. [2024-06-04 15:36:14,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 491 transitions, 8832 flow [2024-06-04 15:36:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 15:36:14,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-04 15:36:14,075 INFO L175 Difference]: Start difference. First operand has 310 places, 472 transitions, 7714 flow. Second operand 7 states and 131 transitions. [2024-06-04 15:36:14,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 491 transitions, 8832 flow [2024-06-04 15:36:15,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 491 transitions, 8651 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 15:36:15,780 INFO L231 Difference]: Finished difference. Result has 309 places, 475 transitions, 7679 flow [2024-06-04 15:36:15,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7533, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7679, PETRI_PLACES=309, PETRI_TRANSITIONS=475} [2024-06-04 15:36:15,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-04 15:36:15,781 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 475 transitions, 7679 flow [2024-06-04 15:36:15,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:15,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:15,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:15,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:36:15,781 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:15,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash 969374487, now seen corresponding path program 7 times [2024-06-04 15:36:15,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:15,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050703401] [2024-06-04 15:36:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:15,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:16,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:16,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050703401] [2024-06-04 15:36:16,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050703401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:16,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:16,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:16,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927953138] [2024-06-04 15:36:16,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:16,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:16,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:16,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:16,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:16,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:16,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 475 transitions, 7679 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:16,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:16,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:16,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:17,825 INFO L124 PetriNetUnfolderBase]: 3506/5553 cut-off events. [2024-06-04 15:36:17,826 INFO L125 PetriNetUnfolderBase]: For 497727/497727 co-relation queries the response was YES. [2024-06-04 15:36:17,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50798 conditions, 5553 events. 3506/5553 cut-off events. For 497727/497727 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33973 event pairs, 850 based on Foata normal form. 8/5560 useless extension candidates. Maximal degree in co-relation 50657. Up to 5133 conditions per place. [2024-06-04 15:36:17,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 43 changer transitions 0/494 dead transitions. [2024-06-04 15:36:17,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 494 transitions, 8777 flow [2024-06-04 15:36:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:36:17,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:36:17,907 INFO L175 Difference]: Start difference. First operand has 309 places, 475 transitions, 7679 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:36:17,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 494 transitions, 8777 flow [2024-06-04 15:36:19,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 494 transitions, 8610 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:19,316 INFO L231 Difference]: Finished difference. Result has 312 places, 475 transitions, 7612 flow [2024-06-04 15:36:19,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7612, PETRI_PLACES=312, PETRI_TRANSITIONS=475} [2024-06-04 15:36:19,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 15:36:19,317 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 475 transitions, 7612 flow [2024-06-04 15:36:19,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:19,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:19,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:19,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:36:19,317 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:19,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash 762275577, now seen corresponding path program 8 times [2024-06-04 15:36:19,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:19,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969856960] [2024-06-04 15:36:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:19,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969856960] [2024-06-04 15:36:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969856960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:19,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:19,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:19,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290740795] [2024-06-04 15:36:19,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:19,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:19,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:19,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:20,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:20,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 475 transitions, 7612 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:20,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:20,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:20,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:21,359 INFO L124 PetriNetUnfolderBase]: 3494/5552 cut-off events. [2024-06-04 15:36:21,359 INFO L125 PetriNetUnfolderBase]: For 487410/487410 co-relation queries the response was YES. [2024-06-04 15:36:21,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50405 conditions, 5552 events. 3494/5552 cut-off events. For 487410/487410 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34014 event pairs, 690 based on Foata normal form. 4/5555 useless extension candidates. Maximal degree in co-relation 50263. Up to 5150 conditions per place. [2024-06-04 15:36:21,432 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 440 selfloop transitions, 53 changer transitions 0/498 dead transitions. [2024-06-04 15:36:21,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 498 transitions, 8751 flow [2024-06-04 15:36:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:36:21,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-04 15:36:21,433 INFO L175 Difference]: Start difference. First operand has 312 places, 475 transitions, 7612 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:36:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 498 transitions, 8751 flow [2024-06-04 15:36:22,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 498 transitions, 8635 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:22,760 INFO L231 Difference]: Finished difference. Result has 312 places, 475 transitions, 7609 flow [2024-06-04 15:36:22,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7496, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7609, PETRI_PLACES=312, PETRI_TRANSITIONS=475} [2024-06-04 15:36:22,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 15:36:22,761 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 475 transitions, 7609 flow [2024-06-04 15:36:22,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:22,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:22,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:22,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:36:22,761 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:22,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 968929017, now seen corresponding path program 9 times [2024-06-04 15:36:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730841140] [2024-06-04 15:36:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:22,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:23,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:23,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730841140] [2024-06-04 15:36:23,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730841140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:23,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:23,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:23,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207629826] [2024-06-04 15:36:23,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:23,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:23,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:23,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:23,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:23,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 475 transitions, 7609 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:23,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:23,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:23,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:24,779 INFO L124 PetriNetUnfolderBase]: 3502/5571 cut-off events. [2024-06-04 15:36:24,779 INFO L125 PetriNetUnfolderBase]: For 500985/500985 co-relation queries the response was YES. [2024-06-04 15:36:24,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50372 conditions, 5571 events. 3502/5571 cut-off events. For 500985/500985 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34233 event pairs, 658 based on Foata normal form. 8/5578 useless extension candidates. Maximal degree in co-relation 50229. Up to 4773 conditions per place. [2024-06-04 15:36:24,855 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 399 selfloop transitions, 107 changer transitions 0/511 dead transitions. [2024-06-04 15:36:24,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 511 transitions, 9246 flow [2024-06-04 15:36:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-04 15:36:24,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-04 15:36:24,857 INFO L175 Difference]: Start difference. First operand has 312 places, 475 transitions, 7609 flow. Second operand 8 states and 165 transitions. [2024-06-04 15:36:24,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 511 transitions, 9246 flow [2024-06-04 15:36:26,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 511 transitions, 9080 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:26,227 INFO L231 Difference]: Finished difference. Result has 314 places, 478 transitions, 7749 flow [2024-06-04 15:36:26,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7443, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7749, PETRI_PLACES=314, PETRI_TRANSITIONS=478} [2024-06-04 15:36:26,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 15:36:26,230 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 478 transitions, 7749 flow [2024-06-04 15:36:26,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:26,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:26,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:36:26,231 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:26,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash 762521655, now seen corresponding path program 2 times [2024-06-04 15:36:26,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:26,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393043240] [2024-06-04 15:36:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:27,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:27,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393043240] [2024-06-04 15:36:27,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393043240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:27,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:27,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:27,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902318740] [2024-06-04 15:36:27,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:27,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:27,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:27,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 478 transitions, 7749 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:27,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:27,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:27,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:28,532 INFO L124 PetriNetUnfolderBase]: 3546/5642 cut-off events. [2024-06-04 15:36:28,532 INFO L125 PetriNetUnfolderBase]: For 525979/525979 co-relation queries the response was YES. [2024-06-04 15:36:28,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51260 conditions, 5642 events. 3546/5642 cut-off events. For 525979/525979 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34716 event pairs, 672 based on Foata normal form. 12/5653 useless extension candidates. Maximal degree in co-relation 51116. Up to 5199 conditions per place. [2024-06-04 15:36:28,615 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 450 selfloop transitions, 47 changer transitions 0/502 dead transitions. [2024-06-04 15:36:28,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 502 transitions, 8933 flow [2024-06-04 15:36:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:36:28,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-04 15:36:28,616 INFO L175 Difference]: Start difference. First operand has 314 places, 478 transitions, 7749 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:36:28,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 502 transitions, 8933 flow [2024-06-04 15:36:30,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 502 transitions, 8601 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:30,345 INFO L231 Difference]: Finished difference. Result has 315 places, 479 transitions, 7536 flow [2024-06-04 15:36:30,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7536, PETRI_PLACES=315, PETRI_TRANSITIONS=479} [2024-06-04 15:36:30,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-04 15:36:30,346 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 479 transitions, 7536 flow [2024-06-04 15:36:30,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:30,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:30,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:30,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:36:30,347 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:30,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash -656607693, now seen corresponding path program 3 times [2024-06-04 15:36:30,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:30,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222715539] [2024-06-04 15:36:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:30,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:31,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222715539] [2024-06-04 15:36:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222715539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:31,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:31,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:31,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827901919] [2024-06-04 15:36:31,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:31,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:31,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 479 transitions, 7536 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:31,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:31,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:31,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:32,563 INFO L124 PetriNetUnfolderBase]: 3598/5721 cut-off events. [2024-06-04 15:36:32,563 INFO L125 PetriNetUnfolderBase]: For 540671/540671 co-relation queries the response was YES. [2024-06-04 15:36:32,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51422 conditions, 5721 events. 3598/5721 cut-off events. For 540671/540671 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35280 event pairs, 563 based on Foata normal form. 14/5734 useless extension candidates. Maximal degree in co-relation 51277. Up to 5244 conditions per place. [2024-06-04 15:36:32,644 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 46 changer transitions 0/504 dead transitions. [2024-06-04 15:36:32,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 504 transitions, 8712 flow [2024-06-04 15:36:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-04 15:36:32,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-04 15:36:32,646 INFO L175 Difference]: Start difference. First operand has 315 places, 479 transitions, 7536 flow. Second operand 6 states and 127 transitions. [2024-06-04 15:36:32,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 504 transitions, 8712 flow [2024-06-04 15:36:34,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 504 transitions, 8615 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:34,516 INFO L231 Difference]: Finished difference. Result has 316 places, 481 transitions, 7582 flow [2024-06-04 15:36:34,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7439, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7582, PETRI_PLACES=316, PETRI_TRANSITIONS=481} [2024-06-04 15:36:34,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-04 15:36:34,517 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 481 transitions, 7582 flow [2024-06-04 15:36:34,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:34,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:34,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:34,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:36:34,518 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:34,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1205855445, now seen corresponding path program 4 times [2024-06-04 15:36:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:34,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935519218] [2024-06-04 15:36:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:34,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:35,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:35,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935519218] [2024-06-04 15:36:35,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935519218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:35,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:35,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:35,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422246533] [2024-06-04 15:36:35,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:35,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:35,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:35,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:35,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:35,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:35,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 481 transitions, 7582 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:35,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:35,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:36,636 INFO L124 PetriNetUnfolderBase]: 3600/5731 cut-off events. [2024-06-04 15:36:36,636 INFO L125 PetriNetUnfolderBase]: For 523486/523486 co-relation queries the response was YES. [2024-06-04 15:36:36,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51370 conditions, 5731 events. 3600/5731 cut-off events. For 523486/523486 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35375 event pairs, 559 based on Foata normal form. 8/5738 useless extension candidates. Maximal degree in co-relation 51224. Up to 5212 conditions per place. [2024-06-04 15:36:36,718 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 456 selfloop transitions, 49 changer transitions 0/510 dead transitions. [2024-06-04 15:36:36,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 510 transitions, 8826 flow [2024-06-04 15:36:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-04 15:36:36,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-04 15:36:36,720 INFO L175 Difference]: Start difference. First operand has 316 places, 481 transitions, 7582 flow. Second operand 7 states and 144 transitions. [2024-06-04 15:36:36,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 510 transitions, 8826 flow [2024-06-04 15:36:38,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 510 transitions, 8735 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:38,089 INFO L231 Difference]: Finished difference. Result has 319 places, 482 transitions, 7617 flow [2024-06-04 15:36:38,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7493, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7617, PETRI_PLACES=319, PETRI_TRANSITIONS=482} [2024-06-04 15:36:38,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-04 15:36:38,090 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 482 transitions, 7617 flow [2024-06-04 15:36:38,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:38,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:38,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:38,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:36:38,091 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:38,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:38,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1718773869, now seen corresponding path program 1 times [2024-06-04 15:36:38,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:38,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694195558] [2024-06-04 15:36:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:38,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:38,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694195558] [2024-06-04 15:36:38,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694195558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:38,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:38,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:38,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467522313] [2024-06-04 15:36:38,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:38,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:38,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:39,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:39,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 482 transitions, 7617 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:39,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:39,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:39,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:40,272 INFO L124 PetriNetUnfolderBase]: 3737/5952 cut-off events. [2024-06-04 15:36:40,272 INFO L125 PetriNetUnfolderBase]: For 579000/579000 co-relation queries the response was YES. [2024-06-04 15:36:40,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53797 conditions, 5952 events. 3737/5952 cut-off events. For 579000/579000 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 36943 event pairs, 658 based on Foata normal form. 14/5964 useless extension candidates. Maximal degree in co-relation 53650. Up to 4840 conditions per place. [2024-06-04 15:36:40,355 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 160 changer transitions 0/531 dead transitions. [2024-06-04 15:36:40,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 531 transitions, 9450 flow [2024-06-04 15:36:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 15:36:40,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-04 15:36:40,356 INFO L175 Difference]: Start difference. First operand has 319 places, 482 transitions, 7617 flow. Second operand 9 states and 184 transitions. [2024-06-04 15:36:40,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 531 transitions, 9450 flow [2024-06-04 15:36:42,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 531 transitions, 9344 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:42,365 INFO L231 Difference]: Finished difference. Result has 324 places, 496 transitions, 8144 flow [2024-06-04 15:36:42,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8144, PETRI_PLACES=324, PETRI_TRANSITIONS=496} [2024-06-04 15:36:42,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 15:36:42,366 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 496 transitions, 8144 flow [2024-06-04 15:36:42,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:42,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:42,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:42,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:36:42,367 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:42,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash -954188229, now seen corresponding path program 1 times [2024-06-04 15:36:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:42,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744200264] [2024-06-04 15:36:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:42,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:43,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:43,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744200264] [2024-06-04 15:36:43,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744200264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:43,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:43,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:43,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487154424] [2024-06-04 15:36:43,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:43,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:43,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:43,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:43,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:43,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 496 transitions, 8144 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:43,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:43,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:43,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:44,979 INFO L124 PetriNetUnfolderBase]: 3863/6093 cut-off events. [2024-06-04 15:36:44,979 INFO L125 PetriNetUnfolderBase]: For 618985/618985 co-relation queries the response was YES. [2024-06-04 15:36:45,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57726 conditions, 6093 events. 3863/6093 cut-off events. For 618985/618985 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37582 event pairs, 664 based on Foata normal form. 8/6096 useless extension candidates. Maximal degree in co-relation 57577. Up to 4314 conditions per place. [2024-06-04 15:36:45,068 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 267 selfloop transitions, 302 changer transitions 0/574 dead transitions. [2024-06-04 15:36:45,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 574 transitions, 10968 flow [2024-06-04 15:36:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:36:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:36:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-04 15:36:45,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-04 15:36:45,070 INFO L175 Difference]: Start difference. First operand has 324 places, 496 transitions, 8144 flow. Second operand 11 states and 219 transitions. [2024-06-04 15:36:45,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 574 transitions, 10968 flow [2024-06-04 15:36:46,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 574 transitions, 10752 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:46,971 INFO L231 Difference]: Finished difference. Result has 336 places, 536 transitions, 9702 flow [2024-06-04 15:36:46,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7942, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9702, PETRI_PLACES=336, PETRI_TRANSITIONS=536} [2024-06-04 15:36:46,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-04 15:36:46,972 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 536 transitions, 9702 flow [2024-06-04 15:36:46,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:46,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:46,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:46,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:36:46,972 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:46,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash -431073885, now seen corresponding path program 2 times [2024-06-04 15:36:46,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:46,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099384291] [2024-06-04 15:36:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:46,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:47,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099384291] [2024-06-04 15:36:47,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099384291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:47,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:47,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059750374] [2024-06-04 15:36:47,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:47,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:47,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:47,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 536 transitions, 9702 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:47,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:47,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:47,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:49,553 INFO L124 PetriNetUnfolderBase]: 3879/6137 cut-off events. [2024-06-04 15:36:49,553 INFO L125 PetriNetUnfolderBase]: For 646243/646243 co-relation queries the response was YES. [2024-06-04 15:36:49,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61758 conditions, 6137 events. 3879/6137 cut-off events. For 646243/646243 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 37952 event pairs, 764 based on Foata normal form. 4/6139 useless extension candidates. Maximal degree in co-relation 61602. Up to 5601 conditions per place. [2024-06-04 15:36:49,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 459 selfloop transitions, 97 changer transitions 0/561 dead transitions. [2024-06-04 15:36:49,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 561 transitions, 11098 flow [2024-06-04 15:36:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:36:49,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:36:49,636 INFO L175 Difference]: Start difference. First operand has 336 places, 536 transitions, 9702 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:36:49,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 561 transitions, 11098 flow [2024-06-04 15:36:51,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 561 transitions, 10827 flow, removed 125 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:51,680 INFO L231 Difference]: Finished difference. Result has 342 places, 539 transitions, 9705 flow [2024-06-04 15:36:51,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9433, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9705, PETRI_PLACES=342, PETRI_TRANSITIONS=539} [2024-06-04 15:36:51,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-04 15:36:51,681 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 539 transitions, 9705 flow [2024-06-04 15:36:51,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:51,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:51,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:51,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:36:51,682 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:51,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash -951391843, now seen corresponding path program 3 times [2024-06-04 15:36:51,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:51,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107423621] [2024-06-04 15:36:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:51,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:52,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:52,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107423621] [2024-06-04 15:36:52,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107423621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:52,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:52,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:52,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215795045] [2024-06-04 15:36:52,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:52,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:52,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:52,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:52,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 539 transitions, 9705 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:52,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:52,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:52,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:54,241 INFO L124 PetriNetUnfolderBase]: 3895/6158 cut-off events. [2024-06-04 15:36:54,241 INFO L125 PetriNetUnfolderBase]: For 642492/642492 co-relation queries the response was YES. [2024-06-04 15:36:54,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61301 conditions, 6158 events. 3895/6158 cut-off events. For 642492/642492 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38132 event pairs, 759 based on Foata normal form. 4/6160 useless extension candidates. Maximal degree in co-relation 61143. Up to 5669 conditions per place. [2024-06-04 15:36:54,335 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 476 selfloop transitions, 80 changer transitions 0/561 dead transitions. [2024-06-04 15:36:54,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 561 transitions, 10950 flow [2024-06-04 15:36:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:36:54,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 15:36:54,336 INFO L175 Difference]: Start difference. First operand has 342 places, 539 transitions, 9705 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:36:54,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 561 transitions, 10950 flow [2024-06-04 15:36:56,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 561 transitions, 10750 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:56,306 INFO L231 Difference]: Finished difference. Result has 345 places, 543 transitions, 9760 flow [2024-06-04 15:36:56,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9506, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9760, PETRI_PLACES=345, PETRI_TRANSITIONS=543} [2024-06-04 15:36:56,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-04 15:36:56,307 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 543 transitions, 9760 flow [2024-06-04 15:36:56,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:56,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:56,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:56,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:36:56,307 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:56,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:56,308 INFO L85 PathProgramCache]: Analyzing trace with hash -836095899, now seen corresponding path program 2 times [2024-06-04 15:36:56,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:56,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32816129] [2024-06-04 15:36:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:57,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:57,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32816129] [2024-06-04 15:36:57,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32816129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:57,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:57,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:57,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926239273] [2024-06-04 15:36:57,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:57,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:57,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:57,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:57,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:57,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:36:57,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 543 transitions, 9760 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:36:57,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:57,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:36:57,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:58,804 INFO L124 PetriNetUnfolderBase]: 3915/6172 cut-off events. [2024-06-04 15:36:58,805 INFO L125 PetriNetUnfolderBase]: For 657382/657382 co-relation queries the response was YES. [2024-06-04 15:36:58,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61707 conditions, 6172 events. 3915/6172 cut-off events. For 657382/657382 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38109 event pairs, 891 based on Foata normal form. 4/6175 useless extension candidates. Maximal degree in co-relation 61548. Up to 5748 conditions per place. [2024-06-04 15:36:58,901 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 523 selfloop transitions, 61 changer transitions 0/589 dead transitions. [2024-06-04 15:36:58,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 589 transitions, 11795 flow [2024-06-04 15:36:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 15:36:58,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-04 15:36:58,903 INFO L175 Difference]: Start difference. First operand has 345 places, 543 transitions, 9760 flow. Second operand 10 states and 184 transitions. [2024-06-04 15:36:58,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 589 transitions, 11795 flow [2024-06-04 15:37:00,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 589 transitions, 11588 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:00,805 INFO L231 Difference]: Finished difference. Result has 353 places, 566 transitions, 10208 flow [2024-06-04 15:37:00,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9557, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10208, PETRI_PLACES=353, PETRI_TRANSITIONS=566} [2024-06-04 15:37:00,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-04 15:37:00,806 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 566 transitions, 10208 flow [2024-06-04 15:37:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:00,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:00,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:37:00,807 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:00,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash -836100549, now seen corresponding path program 3 times [2024-06-04 15:37:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059130235] [2024-06-04 15:37:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:01,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:01,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059130235] [2024-06-04 15:37:01,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059130235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:01,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:01,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:01,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363042489] [2024-06-04 15:37:01,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:01,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:01,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:01,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:01,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 566 transitions, 10208 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:01,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:01,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:01,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:03,638 INFO L124 PetriNetUnfolderBase]: 3977/6276 cut-off events. [2024-06-04 15:37:03,638 INFO L125 PetriNetUnfolderBase]: For 695627/695627 co-relation queries the response was YES. [2024-06-04 15:37:03,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63519 conditions, 6276 events. 3977/6276 cut-off events. For 695627/695627 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 38835 event pairs, 906 based on Foata normal form. 6/6281 useless extension candidates. Maximal degree in co-relation 63356. Up to 5660 conditions per place. [2024-06-04 15:37:03,742 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 498 selfloop transitions, 98 changer transitions 0/601 dead transitions. [2024-06-04 15:37:03,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 601 transitions, 12255 flow [2024-06-04 15:37:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:37:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:37:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-04 15:37:03,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-04 15:37:03,744 INFO L175 Difference]: Start difference. First operand has 353 places, 566 transitions, 10208 flow. Second operand 11 states and 206 transitions. [2024-06-04 15:37:03,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 601 transitions, 12255 flow [2024-06-04 15:37:06,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 601 transitions, 12078 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:06,062 INFO L231 Difference]: Finished difference. Result has 360 places, 575 transitions, 10509 flow [2024-06-04 15:37:06,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10031, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10509, PETRI_PLACES=360, PETRI_TRANSITIONS=575} [2024-06-04 15:37:06,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-04 15:37:06,063 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 575 transitions, 10509 flow [2024-06-04 15:37:06,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:06,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:06,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:06,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:37:06,064 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:06,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash -312986205, now seen corresponding path program 4 times [2024-06-04 15:37:06,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:06,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383024084] [2024-06-04 15:37:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:06,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:07,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:07,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383024084] [2024-06-04 15:37:07,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383024084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:07,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:07,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200988996] [2024-06-04 15:37:07,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:07,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:07,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:07,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 575 transitions, 10509 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:07,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:07,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:07,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:09,009 INFO L124 PetriNetUnfolderBase]: 4257/6726 cut-off events. [2024-06-04 15:37:09,009 INFO L125 PetriNetUnfolderBase]: For 962307/962307 co-relation queries the response was YES. [2024-06-04 15:37:09,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67375 conditions, 6726 events. 4257/6726 cut-off events. For 962307/962307 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 41707 event pairs, 990 based on Foata normal form. 82/6807 useless extension candidates. Maximal degree in co-relation 67210. Up to 5872 conditions per place. [2024-06-04 15:37:09,117 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 535 selfloop transitions, 64 changer transitions 6/610 dead transitions. [2024-06-04 15:37:09,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 610 transitions, 12131 flow [2024-06-04 15:37:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 15:37:09,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-04 15:37:09,119 INFO L175 Difference]: Start difference. First operand has 360 places, 575 transitions, 10509 flow. Second operand 10 states and 191 transitions. [2024-06-04 15:37:09,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 610 transitions, 12131 flow [2024-06-04 15:37:11,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 610 transitions, 11939 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:11,341 INFO L231 Difference]: Finished difference. Result has 364 places, 575 transitions, 10519 flow [2024-06-04 15:37:11,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10317, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10519, PETRI_PLACES=364, PETRI_TRANSITIONS=575} [2024-06-04 15:37:11,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-04 15:37:11,342 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 575 transitions, 10519 flow [2024-06-04 15:37:11,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:11,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:11,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:11,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:37:11,343 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:11,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:11,343 INFO L85 PathProgramCache]: Analyzing trace with hash -835915975, now seen corresponding path program 1 times [2024-06-04 15:37:11,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923231024] [2024-06-04 15:37:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:12,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:12,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923231024] [2024-06-04 15:37:12,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923231024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:12,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:12,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:12,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492172252] [2024-06-04 15:37:12,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:12,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:12,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:12,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:12,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 575 transitions, 10519 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:12,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:12,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:12,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:13,914 INFO L124 PetriNetUnfolderBase]: 4101/6480 cut-off events. [2024-06-04 15:37:13,914 INFO L125 PetriNetUnfolderBase]: For 717844/717844 co-relation queries the response was YES. [2024-06-04 15:37:13,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66035 conditions, 6480 events. 4101/6480 cut-off events. For 717844/717844 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40408 event pairs, 942 based on Foata normal form. 2/6481 useless extension candidates. Maximal degree in co-relation 65868. Up to 6140 conditions per place. [2024-06-04 15:37:14,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 559 selfloop transitions, 29 changer transitions 0/593 dead transitions. [2024-06-04 15:37:14,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 593 transitions, 11811 flow [2024-06-04 15:37:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:37:14,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 15:37:14,020 INFO L175 Difference]: Start difference. First operand has 364 places, 575 transitions, 10519 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:37:14,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 593 transitions, 11811 flow [2024-06-04 15:37:16,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 593 transitions, 11643 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 15:37:16,509 INFO L231 Difference]: Finished difference. Result has 364 places, 577 transitions, 10476 flow [2024-06-04 15:37:16,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10351, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10476, PETRI_PLACES=364, PETRI_TRANSITIONS=577} [2024-06-04 15:37:16,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-04 15:37:16,510 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 577 transitions, 10476 flow [2024-06-04 15:37:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:16,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:16,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:16,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:37:16,510 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:16,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash 969205785, now seen corresponding path program 4 times [2024-06-04 15:37:16,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:16,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83859368] [2024-06-04 15:37:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:16,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:17,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:17,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83859368] [2024-06-04 15:37:17,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83859368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:17,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:17,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:17,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782861860] [2024-06-04 15:37:17,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:17,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:17,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:17,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:17,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 577 transitions, 10476 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:17,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:17,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:17,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:19,435 INFO L124 PetriNetUnfolderBase]: 4175/6583 cut-off events. [2024-06-04 15:37:19,435 INFO L125 PetriNetUnfolderBase]: For 763029/763029 co-relation queries the response was YES. [2024-06-04 15:37:19,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67489 conditions, 6583 events. 4175/6583 cut-off events. For 763029/763029 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40981 event pairs, 747 based on Foata normal form. 6/6588 useless extension candidates. Maximal degree in co-relation 67321. Up to 5639 conditions per place. [2024-06-04 15:37:19,541 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 478 selfloop transitions, 145 changer transitions 0/628 dead transitions. [2024-06-04 15:37:19,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 628 transitions, 12860 flow [2024-06-04 15:37:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-04 15:37:19,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-04 15:37:19,543 INFO L175 Difference]: Start difference. First operand has 364 places, 577 transitions, 10476 flow. Second operand 10 states and 205 transitions. [2024-06-04 15:37:19,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 628 transitions, 12860 flow [2024-06-04 15:37:22,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 628 transitions, 12693 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:22,393 INFO L231 Difference]: Finished difference. Result has 369 places, 589 transitions, 11004 flow [2024-06-04 15:37:22,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10309, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11004, PETRI_PLACES=369, PETRI_TRANSITIONS=589} [2024-06-04 15:37:22,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-04 15:37:22,394 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 589 transitions, 11004 flow [2024-06-04 15:37:22,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:22,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:22,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:22,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:37:22,394 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:22,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash 109326537, now seen corresponding path program 2 times [2024-06-04 15:37:22,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:22,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858306571] [2024-06-04 15:37:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858306571] [2024-06-04 15:37:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858306571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:23,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:23,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949751517] [2024-06-04 15:37:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:23,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:23,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:23,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:23,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:23,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:23,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 589 transitions, 11004 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:23,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:23,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:23,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:25,076 INFO L124 PetriNetUnfolderBase]: 4183/6587 cut-off events. [2024-06-04 15:37:25,076 INFO L125 PetriNetUnfolderBase]: For 767122/767122 co-relation queries the response was YES. [2024-06-04 15:37:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68312 conditions, 6587 events. 4183/6587 cut-off events. For 767122/767122 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40913 event pairs, 957 based on Foata normal form. 2/6588 useless extension candidates. Maximal degree in co-relation 68143. Up to 6249 conditions per place. [2024-06-04 15:37:25,177 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 570 selfloop transitions, 31 changer transitions 0/606 dead transitions. [2024-06-04 15:37:25,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 606 transitions, 12324 flow [2024-06-04 15:37:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 15:37:25,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-04 15:37:25,179 INFO L175 Difference]: Start difference. First operand has 369 places, 589 transitions, 11004 flow. Second operand 7 states and 128 transitions. [2024-06-04 15:37:25,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 606 transitions, 12324 flow [2024-06-04 15:37:27,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 606 transitions, 12016 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:27,826 INFO L231 Difference]: Finished difference. Result has 370 places, 591 transitions, 10832 flow [2024-06-04 15:37:27,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10696, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10832, PETRI_PLACES=370, PETRI_TRANSITIONS=591} [2024-06-04 15:37:27,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-04 15:37:27,827 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 591 transitions, 10832 flow [2024-06-04 15:37:27,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:27,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:27,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:27,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:37:27,828 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:27,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 969383415, now seen corresponding path program 5 times [2024-06-04 15:37:27,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:27,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738948465] [2024-06-04 15:37:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:27,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:28,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738948465] [2024-06-04 15:37:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738948465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:28,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:28,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:28,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967159540] [2024-06-04 15:37:28,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:28,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:28,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:28,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:28,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 591 transitions, 10832 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:28,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:28,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:28,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:30,525 INFO L124 PetriNetUnfolderBase]: 4197/6613 cut-off events. [2024-06-04 15:37:30,525 INFO L125 PetriNetUnfolderBase]: For 786807/786807 co-relation queries the response was YES. [2024-06-04 15:37:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68128 conditions, 6613 events. 4197/6613 cut-off events. For 786807/786807 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 41150 event pairs, 955 based on Foata normal form. 6/6618 useless extension candidates. Maximal degree in co-relation 67957. Up to 6125 conditions per place. [2024-06-04 15:37:30,639 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 559 selfloop transitions, 53 changer transitions 1/618 dead transitions. [2024-06-04 15:37:30,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 618 transitions, 12390 flow [2024-06-04 15:37:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:37:30,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 15:37:30,641 INFO L175 Difference]: Start difference. First operand has 370 places, 591 transitions, 10832 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:37:30,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 618 transitions, 12390 flow [2024-06-04 15:37:33,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 618 transitions, 12274 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:33,164 INFO L231 Difference]: Finished difference. Result has 374 places, 595 transitions, 10961 flow [2024-06-04 15:37:33,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10716, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10961, PETRI_PLACES=374, PETRI_TRANSITIONS=595} [2024-06-04 15:37:33,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-04 15:37:33,165 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 595 transitions, 10961 flow [2024-06-04 15:37:33,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:33,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:33,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:37:33,166 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:33,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash 969205661, now seen corresponding path program 5 times [2024-06-04 15:37:33,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:33,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964472174] [2024-06-04 15:37:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:33,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:34,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:34,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964472174] [2024-06-04 15:37:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964472174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:34,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955341364] [2024-06-04 15:37:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:34,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:34,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:34,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 595 transitions, 10961 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:34,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:34,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:34,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:36,029 INFO L124 PetriNetUnfolderBase]: 4467/7070 cut-off events. [2024-06-04 15:37:36,029 INFO L125 PetriNetUnfolderBase]: For 1059480/1059480 co-relation queries the response was YES. [2024-06-04 15:37:36,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71538 conditions, 7070 events. 4467/7070 cut-off events. For 1059480/1059480 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 44364 event pairs, 784 based on Foata normal form. 85/7154 useless extension candidates. Maximal degree in co-relation 71366. Up to 5778 conditions per place. [2024-06-04 15:37:36,144 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 515 selfloop transitions, 114 changer transitions 9/643 dead transitions. [2024-06-04 15:37:36,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 643 transitions, 12737 flow [2024-06-04 15:37:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-04 15:37:36,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 15:37:36,146 INFO L175 Difference]: Start difference. First operand has 374 places, 595 transitions, 10961 flow. Second operand 9 states and 195 transitions. [2024-06-04 15:37:36,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 643 transitions, 12737 flow [2024-06-04 15:37:39,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 643 transitions, 12545 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:39,493 INFO L231 Difference]: Finished difference. Result has 378 places, 594 transitions, 11076 flow [2024-06-04 15:37:39,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10769, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11076, PETRI_PLACES=378, PETRI_TRANSITIONS=594} [2024-06-04 15:37:39,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 15:37:39,505 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 594 transitions, 11076 flow [2024-06-04 15:37:39,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:39,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:39,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:39,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:37:39,506 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:39,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash 975646469, now seen corresponding path program 3 times [2024-06-04 15:37:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:39,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465376424] [2024-06-04 15:37:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:40,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465376424] [2024-06-04 15:37:40,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465376424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:40,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:40,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938930483] [2024-06-04 15:37:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:40,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:40,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:40,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:40,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 594 transitions, 11076 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:40,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:40,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:40,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:42,123 INFO L124 PetriNetUnfolderBase]: 4307/6809 cut-off events. [2024-06-04 15:37:42,123 INFO L125 PetriNetUnfolderBase]: For 805538/805538 co-relation queries the response was YES. [2024-06-04 15:37:42,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70492 conditions, 6809 events. 4307/6809 cut-off events. For 805538/805538 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42741 event pairs, 968 based on Foata normal form. 2/6810 useless extension candidates. Maximal degree in co-relation 70318. Up to 6444 conditions per place. [2024-06-04 15:37:42,244 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 573 selfloop transitions, 31 changer transitions 0/609 dead transitions. [2024-06-04 15:37:42,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 609 transitions, 12392 flow [2024-06-04 15:37:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-04 15:37:42,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-04 15:37:42,246 INFO L175 Difference]: Start difference. First operand has 378 places, 594 transitions, 11076 flow. Second operand 6 states and 113 transitions. [2024-06-04 15:37:42,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 609 transitions, 12392 flow [2024-06-04 15:37:46,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 609 transitions, 12119 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:46,078 INFO L231 Difference]: Finished difference. Result has 378 places, 596 transitions, 10944 flow [2024-06-04 15:37:46,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10803, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10944, PETRI_PLACES=378, PETRI_TRANSITIONS=596} [2024-06-04 15:37:46,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 15:37:46,079 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 596 transitions, 10944 flow [2024-06-04 15:37:46,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:46,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:46,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:46,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:37:46,079 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:46,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:46,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1205862389, now seen corresponding path program 4 times [2024-06-04 15:37:46,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:46,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874907405] [2024-06-04 15:37:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:46,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:46,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:46,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874907405] [2024-06-04 15:37:46,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874907405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:46,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:46,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:46,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965116709] [2024-06-04 15:37:46,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:46,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:46,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:46,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 596 transitions, 10944 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:46,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:46,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:46,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:48,565 INFO L124 PetriNetUnfolderBase]: 4315/6837 cut-off events. [2024-06-04 15:37:48,565 INFO L125 PetriNetUnfolderBase]: For 814994/814994 co-relation queries the response was YES. [2024-06-04 15:37:48,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70118 conditions, 6837 events. 4315/6837 cut-off events. For 814994/814994 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43004 event pairs, 1035 based on Foata normal form. 2/6838 useless extension candidates. Maximal degree in co-relation 69943. Up to 6490 conditions per place. [2024-06-04 15:37:48,676 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 587 selfloop transitions, 16 changer transitions 0/608 dead transitions. [2024-06-04 15:37:48,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 608 transitions, 12244 flow [2024-06-04 15:37:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 15:37:48,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:37:48,678 INFO L175 Difference]: Start difference. First operand has 378 places, 596 transitions, 10944 flow. Second operand 6 states and 108 transitions. [2024-06-04 15:37:48,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 608 transitions, 12244 flow [2024-06-04 15:37:51,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 608 transitions, 12125 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:51,495 INFO L231 Difference]: Finished difference. Result has 380 places, 598 transitions, 10934 flow [2024-06-04 15:37:51,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10829, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10934, PETRI_PLACES=380, PETRI_TRANSITIONS=598} [2024-06-04 15:37:51,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-04 15:37:51,496 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 598 transitions, 10934 flow [2024-06-04 15:37:51,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:51,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:51,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:51,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:37:51,496 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:51,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1205565471, now seen corresponding path program 1 times [2024-06-04 15:37:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:51,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892231452] [2024-06-04 15:37:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:52,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:52,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892231452] [2024-06-04 15:37:52,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892231452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:52,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:52,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:52,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995389077] [2024-06-04 15:37:52,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:52,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:52,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:52,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:52,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 598 transitions, 10934 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:52,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:52,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:54,224 INFO L124 PetriNetUnfolderBase]: 4332/6871 cut-off events. [2024-06-04 15:37:54,225 INFO L125 PetriNetUnfolderBase]: For 817072/817072 co-relation queries the response was YES. [2024-06-04 15:37:54,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70317 conditions, 6871 events. 4332/6871 cut-off events. For 817072/817072 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 43367 event pairs, 823 based on Foata normal form. 3/6873 useless extension candidates. Maximal degree in co-relation 70141. Up to 6206 conditions per place. [2024-06-04 15:37:54,345 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 104 changer transitions 0/628 dead transitions. [2024-06-04 15:37:54,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 628 transitions, 12630 flow [2024-06-04 15:37:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-04 15:37:54,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-04 15:37:54,347 INFO L175 Difference]: Start difference. First operand has 380 places, 598 transitions, 10934 flow. Second operand 7 states and 149 transitions. [2024-06-04 15:37:54,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 628 transitions, 12630 flow [2024-06-04 15:37:57,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 628 transitions, 12493 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:57,710 INFO L231 Difference]: Finished difference. Result has 384 places, 605 transitions, 11314 flow [2024-06-04 15:37:57,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10797, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11314, PETRI_PLACES=384, PETRI_TRANSITIONS=605} [2024-06-04 15:37:57,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-04 15:37:57,711 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 605 transitions, 11314 flow [2024-06-04 15:37:57,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:57,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:57,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:57,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:37:57,711 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:57,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1205565719, now seen corresponding path program 5 times [2024-06-04 15:37:57,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:57,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773974636] [2024-06-04 15:37:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:57,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:58,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:58,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773974636] [2024-06-04 15:37:58,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773974636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:58,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:58,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:58,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896028503] [2024-06-04 15:37:58,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:58,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:58,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:37:58,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 605 transitions, 11314 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:37:58,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:58,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:37:58,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:00,334 INFO L124 PetriNetUnfolderBase]: 4327/6842 cut-off events. [2024-06-04 15:38:00,334 INFO L125 PetriNetUnfolderBase]: For 831703/831703 co-relation queries the response was YES. [2024-06-04 15:38:00,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71033 conditions, 6842 events. 4327/6842 cut-off events. For 831703/831703 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43012 event pairs, 982 based on Foata normal form. 2/6843 useless extension candidates. Maximal degree in co-relation 70855. Up to 6461 conditions per place. [2024-06-04 15:38:00,460 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 577 selfloop transitions, 38 changer transitions 0/620 dead transitions. [2024-06-04 15:38:00,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 620 transitions, 12658 flow [2024-06-04 15:38:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 15:38:00,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:38:00,461 INFO L175 Difference]: Start difference. First operand has 384 places, 605 transitions, 11314 flow. Second operand 6 states and 114 transitions. [2024-06-04 15:38:00,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 620 transitions, 12658 flow [2024-06-04 15:38:03,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 620 transitions, 12575 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 15:38:03,064 INFO L231 Difference]: Finished difference. Result has 387 places, 607 transitions, 11395 flow [2024-06-04 15:38:03,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11231, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11395, PETRI_PLACES=387, PETRI_TRANSITIONS=607} [2024-06-04 15:38:03,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-04 15:38:03,065 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 607 transitions, 11395 flow [2024-06-04 15:38:03,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:03,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:03,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:03,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:38:03,065 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:03,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1818550131, now seen corresponding path program 1 times [2024-06-04 15:38:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:03,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777573808] [2024-06-04 15:38:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:03,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:03,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777573808] [2024-06-04 15:38:03,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777573808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:03,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:03,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:03,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152557591] [2024-06-04 15:38:03,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:03,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:03,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:04,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:04,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 607 transitions, 11395 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:04,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:04,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:04,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:06,005 INFO L124 PetriNetUnfolderBase]: 4332/6866 cut-off events. [2024-06-04 15:38:06,005 INFO L125 PetriNetUnfolderBase]: For 842106/842106 co-relation queries the response was YES. [2024-06-04 15:38:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71439 conditions, 6866 events. 4332/6866 cut-off events. For 842106/842106 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43247 event pairs, 818 based on Foata normal form. 1/6866 useless extension candidates. Maximal degree in co-relation 71259. Up to 6403 conditions per place. [2024-06-04 15:38:06,109 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 573 selfloop transitions, 56 changer transitions 0/634 dead transitions. [2024-06-04 15:38:06,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 634 transitions, 12966 flow [2024-06-04 15:38:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:38:06,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:38:06,111 INFO L175 Difference]: Start difference. First operand has 387 places, 607 transitions, 11395 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:38:06,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 634 transitions, 12966 flow [2024-06-04 15:38:08,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 634 transitions, 12813 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:08,344 INFO L231 Difference]: Finished difference. Result has 390 places, 610 transitions, 11424 flow [2024-06-04 15:38:08,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11242, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11424, PETRI_PLACES=390, PETRI_TRANSITIONS=610} [2024-06-04 15:38:08,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-04 15:38:08,345 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 610 transitions, 11424 flow [2024-06-04 15:38:08,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:08,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:08,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:08,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:38:08,346 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:08,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash 520766245, now seen corresponding path program 2 times [2024-06-04 15:38:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:08,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117785003] [2024-06-04 15:38:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:08,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:09,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117785003] [2024-06-04 15:38:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117785003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:09,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:09,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316789591] [2024-06-04 15:38:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:09,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:09,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:09,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 610 transitions, 11424 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:09,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:09,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:09,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:11,235 INFO L124 PetriNetUnfolderBase]: 4352/6902 cut-off events. [2024-06-04 15:38:11,235 INFO L125 PetriNetUnfolderBase]: For 859021/859021 co-relation queries the response was YES. [2024-06-04 15:38:11,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71828 conditions, 6902 events. 4352/6902 cut-off events. For 859021/859021 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43545 event pairs, 820 based on Foata normal form. 1/6902 useless extension candidates. Maximal degree in co-relation 71647. Up to 6462 conditions per place. [2024-06-04 15:38:11,358 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 576 selfloop transitions, 61 changer transitions 0/642 dead transitions. [2024-06-04 15:38:11,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 642 transitions, 12969 flow [2024-06-04 15:38:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:38:11,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:38:11,360 INFO L175 Difference]: Start difference. First operand has 390 places, 610 transitions, 11424 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:38:11,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 642 transitions, 12969 flow [2024-06-04 15:38:14,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 642 transitions, 12708 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:14,077 INFO L231 Difference]: Finished difference. Result has 393 places, 622 transitions, 11512 flow [2024-06-04 15:38:14,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11202, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11512, PETRI_PLACES=393, PETRI_TRANSITIONS=622} [2024-06-04 15:38:14,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 15:38:14,078 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 622 transitions, 11512 flow [2024-06-04 15:38:14,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:14,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:14,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:14,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:38:14,078 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:14,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash 296516075, now seen corresponding path program 3 times [2024-06-04 15:38:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056944922] [2024-06-04 15:38:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056944922] [2024-06-04 15:38:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056944922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:14,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:14,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:14,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868629351] [2024-06-04 15:38:14,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:14,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:14,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 622 transitions, 11512 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:14,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:14,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:14,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:16,908 INFO L124 PetriNetUnfolderBase]: 4357/6904 cut-off events. [2024-06-04 15:38:16,909 INFO L125 PetriNetUnfolderBase]: For 872573/872573 co-relation queries the response was YES. [2024-06-04 15:38:16,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71945 conditions, 6904 events. 4357/6904 cut-off events. For 872573/872573 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43480 event pairs, 803 based on Foata normal form. 1/6904 useless extension candidates. Maximal degree in co-relation 71763. Up to 6469 conditions per place. [2024-06-04 15:38:17,022 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 575 selfloop transitions, 60 changer transitions 0/640 dead transitions. [2024-06-04 15:38:17,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 640 transitions, 12881 flow [2024-06-04 15:38:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:38:17,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 15:38:17,023 INFO L175 Difference]: Start difference. First operand has 393 places, 622 transitions, 11512 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:38:17,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 640 transitions, 12881 flow [2024-06-04 15:38:19,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 640 transitions, 12739 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:19,901 INFO L231 Difference]: Finished difference. Result has 396 places, 625 transitions, 11561 flow [2024-06-04 15:38:19,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11370, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11561, PETRI_PLACES=396, PETRI_TRANSITIONS=625} [2024-06-04 15:38:19,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-04 15:38:19,902 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 625 transitions, 11561 flow [2024-06-04 15:38:19,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:19,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:19,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:19,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:38:19,903 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:19,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1703706965, now seen corresponding path program 1 times [2024-06-04 15:38:19,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:19,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130642740] [2024-06-04 15:38:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:19,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:20,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130642740] [2024-06-04 15:38:20,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130642740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:20,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:20,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:20,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629265103] [2024-06-04 15:38:20,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:20,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:20,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:20,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 625 transitions, 11561 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:20,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:20,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:20,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:22,827 INFO L124 PetriNetUnfolderBase]: 4365/6921 cut-off events. [2024-06-04 15:38:22,828 INFO L125 PetriNetUnfolderBase]: For 890569/890569 co-relation queries the response was YES. [2024-06-04 15:38:22,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72041 conditions, 6921 events. 4365/6921 cut-off events. For 890569/890569 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43638 event pairs, 710 based on Foata normal form. 2/6922 useless extension candidates. Maximal degree in co-relation 71858. Up to 6410 conditions per place. [2024-06-04 15:38:22,936 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 589 selfloop transitions, 62 changer transitions 0/656 dead transitions. [2024-06-04 15:38:22,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 656 transitions, 13219 flow [2024-06-04 15:38:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:38:22,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:38:22,938 INFO L175 Difference]: Start difference. First operand has 396 places, 625 transitions, 11561 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:38:22,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 656 transitions, 13219 flow [2024-06-04 15:38:25,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 656 transitions, 13079 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:25,839 INFO L231 Difference]: Finished difference. Result has 400 places, 630 transitions, 11670 flow [2024-06-04 15:38:25,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11421, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11670, PETRI_PLACES=400, PETRI_TRANSITIONS=630} [2024-06-04 15:38:25,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 15:38:25,840 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 630 transitions, 11670 flow [2024-06-04 15:38:25,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:25,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:25,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:25,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:38:25,841 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:25,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1723197803, now seen corresponding path program 2 times [2024-06-04 15:38:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:25,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818416957] [2024-06-04 15:38:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:26,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:26,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818416957] [2024-06-04 15:38:26,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818416957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:26,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:26,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453500919] [2024-06-04 15:38:26,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:26,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:26,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:26,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:26,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:26,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 630 transitions, 11670 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:26,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:26,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:26,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:28,757 INFO L124 PetriNetUnfolderBase]: 4373/6933 cut-off events. [2024-06-04 15:38:28,757 INFO L125 PetriNetUnfolderBase]: For 908245/908245 co-relation queries the response was YES. [2024-06-04 15:38:28,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72490 conditions, 6933 events. 4373/6933 cut-off events. For 908245/908245 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 43805 event pairs, 824 based on Foata normal form. 2/6934 useless extension candidates. Maximal degree in co-relation 72305. Up to 6490 conditions per place. [2024-06-04 15:38:28,881 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 588 selfloop transitions, 60 changer transitions 0/653 dead transitions. [2024-06-04 15:38:28,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 653 transitions, 13072 flow [2024-06-04 15:38:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:38:28,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:38:28,883 INFO L175 Difference]: Start difference. First operand has 400 places, 630 transitions, 11670 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:38:28,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 653 transitions, 13072 flow [2024-06-04 15:38:31,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 653 transitions, 12927 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:31,873 INFO L231 Difference]: Finished difference. Result has 404 places, 632 transitions, 11702 flow [2024-06-04 15:38:31,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11541, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11702, PETRI_PLACES=404, PETRI_TRANSITIONS=632} [2024-06-04 15:38:31,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-04 15:38:31,874 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 632 transitions, 11702 flow [2024-06-04 15:38:31,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:31,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:31,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:31,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:38:31,874 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:31,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1455766831, now seen corresponding path program 3 times [2024-06-04 15:38:31,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:31,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938245176] [2024-06-04 15:38:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:32,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:32,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938245176] [2024-06-04 15:38:32,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938245176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:32,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:32,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:32,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335096030] [2024-06-04 15:38:32,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:32,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:32,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:32,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 632 transitions, 11702 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:32,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:32,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:32,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:34,733 INFO L124 PetriNetUnfolderBase]: 4381/6940 cut-off events. [2024-06-04 15:38:34,734 INFO L125 PetriNetUnfolderBase]: For 925021/925021 co-relation queries the response was YES. [2024-06-04 15:38:34,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72709 conditions, 6940 events. 4381/6940 cut-off events. For 925021/925021 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 43687 event pairs, 801 based on Foata normal form. 2/6938 useless extension candidates. Maximal degree in co-relation 72522. Up to 6504 conditions per place. [2024-06-04 15:38:34,853 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 587 selfloop transitions, 58 changer transitions 0/650 dead transitions. [2024-06-04 15:38:34,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 650 transitions, 13109 flow [2024-06-04 15:38:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:38:34,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 15:38:34,855 INFO L175 Difference]: Start difference. First operand has 404 places, 632 transitions, 11702 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:38:34,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 650 transitions, 13109 flow [2024-06-04 15:38:38,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 650 transitions, 12970 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:38,676 INFO L231 Difference]: Finished difference. Result has 408 places, 635 transitions, 11756 flow [2024-06-04 15:38:38,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11567, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11756, PETRI_PLACES=408, PETRI_TRANSITIONS=635} [2024-06-04 15:38:38,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-04 15:38:38,677 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 635 transitions, 11756 flow [2024-06-04 15:38:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:38,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:38:38,677 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:38,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash -894825205, now seen corresponding path program 1 times [2024-06-04 15:38:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236914214] [2024-06-04 15:38:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:39,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:39,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236914214] [2024-06-04 15:38:39,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236914214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:39,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:39,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114561283] [2024-06-04 15:38:39,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:39,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:39,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:39,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:39,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 635 transitions, 11756 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:39,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:39,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:39,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:41,628 INFO L124 PetriNetUnfolderBase]: 4401/6974 cut-off events. [2024-06-04 15:38:41,629 INFO L125 PetriNetUnfolderBase]: For 951596/951596 co-relation queries the response was YES. [2024-06-04 15:38:41,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73234 conditions, 6974 events. 4401/6974 cut-off events. For 951596/951596 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 44054 event pairs, 807 based on Foata normal form. 4/6977 useless extension candidates. Maximal degree in co-relation 73045. Up to 6404 conditions per place. [2024-06-04 15:38:41,750 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 558 selfloop transitions, 108 changer transitions 0/671 dead transitions. [2024-06-04 15:38:41,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 671 transitions, 13690 flow [2024-06-04 15:38:41,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:38:41,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 15:38:41,751 INFO L175 Difference]: Start difference. First operand has 408 places, 635 transitions, 11756 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:38:41,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 671 transitions, 13690 flow [2024-06-04 15:38:44,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 671 transitions, 13573 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:44,998 INFO L231 Difference]: Finished difference. Result has 413 places, 647 transitions, 12214 flow [2024-06-04 15:38:44,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12214, PETRI_PLACES=413, PETRI_TRANSITIONS=647} [2024-06-04 15:38:44,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-04 15:38:44,999 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 647 transitions, 12214 flow [2024-06-04 15:38:44,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:44,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:44,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:44,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:38:45,000 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:45,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash -894825050, now seen corresponding path program 1 times [2024-06-04 15:38:45,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:45,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763417272] [2024-06-04 15:38:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:45,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:45,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:45,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763417272] [2024-06-04 15:38:45,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763417272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:45,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:45,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:45,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19768123] [2024-06-04 15:38:45,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:45,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:45,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:45,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 647 transitions, 12214 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:45,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:45,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:45,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:47,887 INFO L124 PetriNetUnfolderBase]: 4453/7049 cut-off events. [2024-06-04 15:38:47,887 INFO L125 PetriNetUnfolderBase]: For 1008364/1008364 co-relation queries the response was YES. [2024-06-04 15:38:47,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75135 conditions, 7049 events. 4453/7049 cut-off events. For 1008364/1008364 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 44540 event pairs, 833 based on Foata normal form. 4/7052 useless extension candidates. Maximal degree in co-relation 74944. Up to 6440 conditions per place. [2024-06-04 15:38:48,003 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 598 selfloop transitions, 83 changer transitions 0/686 dead transitions. [2024-06-04 15:38:48,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 686 transitions, 14265 flow [2024-06-04 15:38:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 15:38:48,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-04 15:38:48,006 INFO L175 Difference]: Start difference. First operand has 413 places, 647 transitions, 12214 flow. Second operand 9 states and 173 transitions. [2024-06-04 15:38:48,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 686 transitions, 14265 flow [2024-06-04 15:38:51,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 686 transitions, 13859 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-04 15:38:51,268 INFO L231 Difference]: Finished difference. Result has 415 places, 653 transitions, 12171 flow [2024-06-04 15:38:51,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11810, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12171, PETRI_PLACES=415, PETRI_TRANSITIONS=653} [2024-06-04 15:38:51,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-04 15:38:51,268 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 653 transitions, 12171 flow [2024-06-04 15:38:51,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:51,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:51,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:51,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:38:51,269 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:51,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash 488529844, now seen corresponding path program 2 times [2024-06-04 15:38:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088755834] [2024-06-04 15:38:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088755834] [2024-06-04 15:38:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088755834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:51,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928355800] [2024-06-04 15:38:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:52,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:52,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 653 transitions, 12171 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:52,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:52,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:52,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:54,066 INFO L124 PetriNetUnfolderBase]: 4441/7033 cut-off events. [2024-06-04 15:38:54,066 INFO L125 PetriNetUnfolderBase]: For 988885/988885 co-relation queries the response was YES. [2024-06-04 15:38:54,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74402 conditions, 7033 events. 4441/7033 cut-off events. For 988885/988885 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 44436 event pairs, 833 based on Foata normal form. 4/7036 useless extension candidates. Maximal degree in co-relation 74211. Up to 6456 conditions per place. [2024-06-04 15:38:54,189 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 600 selfloop transitions, 77 changer transitions 0/682 dead transitions. [2024-06-04 15:38:54,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 682 transitions, 13777 flow [2024-06-04 15:38:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:38:54,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-04 15:38:54,191 INFO L175 Difference]: Start difference. First operand has 415 places, 653 transitions, 12171 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:38:54,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 682 transitions, 13777 flow [2024-06-04 15:38:58,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 682 transitions, 13548 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:58,033 INFO L231 Difference]: Finished difference. Result has 419 places, 653 transitions, 12102 flow [2024-06-04 15:38:58,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11942, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12102, PETRI_PLACES=419, PETRI_TRANSITIONS=653} [2024-06-04 15:38:58,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-04 15:38:58,034 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 653 transitions, 12102 flow [2024-06-04 15:38:58,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:58,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:58,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:38:58,035 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:58,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1684639668, now seen corresponding path program 3 times [2024-06-04 15:38:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139851063] [2024-06-04 15:38:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:58,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139851063] [2024-06-04 15:38:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139851063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:58,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:58,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:58,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457120448] [2024-06-04 15:38:58,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:58,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:58,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:58,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:58,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:38:58,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 653 transitions, 12102 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:38:58,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:38:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:00,984 INFO L124 PetriNetUnfolderBase]: 4461/7063 cut-off events. [2024-06-04 15:39:00,985 INFO L125 PetriNetUnfolderBase]: For 1005396/1005396 co-relation queries the response was YES. [2024-06-04 15:39:01,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74831 conditions, 7063 events. 4461/7063 cut-off events. For 1005396/1005396 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 44656 event pairs, 831 based on Foata normal form. 4/7066 useless extension candidates. Maximal degree in co-relation 74638. Up to 6601 conditions per place. [2024-06-04 15:39:01,105 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 623 selfloop transitions, 51 changer transitions 0/679 dead transitions. [2024-06-04 15:39:01,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 679 transitions, 13741 flow [2024-06-04 15:39:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:39:01,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 15:39:01,106 INFO L175 Difference]: Start difference. First operand has 419 places, 653 transitions, 12102 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:39:01,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 679 transitions, 13741 flow [2024-06-04 15:39:05,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 679 transitions, 13576 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 15:39:05,405 INFO L231 Difference]: Finished difference. Result has 420 places, 656 transitions, 12148 flow [2024-06-04 15:39:05,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11937, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12148, PETRI_PLACES=420, PETRI_TRANSITIONS=656} [2024-06-04 15:39:05,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-04 15:39:05,406 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 656 transitions, 12148 flow [2024-06-04 15:39:05,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:05,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:05,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:05,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:39:05,406 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:05,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:05,407 INFO L85 PathProgramCache]: Analyzing trace with hash 308909131, now seen corresponding path program 1 times [2024-06-04 15:39:05,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:05,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499094834] [2024-06-04 15:39:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:05,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:06,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:06,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499094834] [2024-06-04 15:39:06,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499094834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:06,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:06,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:06,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299922279] [2024-06-04 15:39:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:06,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:06,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:06,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:06,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:06,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:39:06,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 656 transitions, 12148 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:06,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:06,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:39:06,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:08,358 INFO L124 PetriNetUnfolderBase]: 4471/7075 cut-off events. [2024-06-04 15:39:08,359 INFO L125 PetriNetUnfolderBase]: For 1013390/1013390 co-relation queries the response was YES. [2024-06-04 15:39:08,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75125 conditions, 7075 events. 4471/7075 cut-off events. For 1013390/1013390 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 44699 event pairs, 835 based on Foata normal form. 2/7076 useless extension candidates. Maximal degree in co-relation 74931. Up to 6631 conditions per place. [2024-06-04 15:39:08,481 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 623 selfloop transitions, 58 changer transitions 0/686 dead transitions. [2024-06-04 15:39:08,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 686 transitions, 13836 flow [2024-06-04 15:39:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:39:08,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:39:08,482 INFO L175 Difference]: Start difference. First operand has 420 places, 656 transitions, 12148 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:39:08,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 686 transitions, 13836 flow [2024-06-04 15:39:12,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 686 transitions, 13662 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:12,982 INFO L231 Difference]: Finished difference. Result has 423 places, 669 transitions, 12408 flow [2024-06-04 15:39:12,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11974, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12408, PETRI_PLACES=423, PETRI_TRANSITIONS=669} [2024-06-04 15:39:12,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 15:39:12,983 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 669 transitions, 12408 flow [2024-06-04 15:39:12,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:12,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:12,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:12,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:39:12,984 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:12,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1691991318, now seen corresponding path program 4 times [2024-06-04 15:39:12,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:12,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935772405] [2024-06-04 15:39:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:12,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:13,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:13,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935772405] [2024-06-04 15:39:13,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935772405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:13,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:13,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:13,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5673461] [2024-06-04 15:39:13,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:13,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:13,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:13,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:13,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:39:13,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 669 transitions, 12408 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:13,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:13,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:39:13,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:15,896 INFO L124 PetriNetUnfolderBase]: 4491/7093 cut-off events. [2024-06-04 15:39:15,896 INFO L125 PetriNetUnfolderBase]: For 1051643/1051643 co-relation queries the response was YES. [2024-06-04 15:39:15,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76324 conditions, 7093 events. 4491/7093 cut-off events. For 1051643/1051643 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 44763 event pairs, 828 based on Foata normal form. 4/7096 useless extension candidates. Maximal degree in co-relation 76127. Up to 6669 conditions per place. [2024-06-04 15:39:16,024 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 641 selfloop transitions, 46 changer transitions 0/692 dead transitions. [2024-06-04 15:39:16,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 692 transitions, 14029 flow [2024-06-04 15:39:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:39:16,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-04 15:39:16,026 INFO L175 Difference]: Start difference. First operand has 423 places, 669 transitions, 12408 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:39:16,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 692 transitions, 14029 flow [2024-06-04 15:39:20,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 692 transitions, 13839 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:20,486 INFO L231 Difference]: Finished difference. Result has 427 places, 672 transitions, 12425 flow [2024-06-04 15:39:20,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12218, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12425, PETRI_PLACES=427, PETRI_TRANSITIONS=672} [2024-06-04 15:39:20,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-04 15:39:20,487 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 672 transitions, 12425 flow [2024-06-04 15:39:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:20,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:20,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:20,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:39:20,487 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:20,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash 301284619, now seen corresponding path program 2 times [2024-06-04 15:39:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:20,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907128015] [2024-06-04 15:39:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:21,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:21,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907128015] [2024-06-04 15:39:21,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907128015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:21,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:21,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:21,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035138346] [2024-06-04 15:39:21,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:21,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:21,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:21,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:21,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:21,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:39:21,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 672 transitions, 12425 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:21,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:21,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:39:21,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:23,518 INFO L124 PetriNetUnfolderBase]: 4501/7113 cut-off events. [2024-06-04 15:39:23,518 INFO L125 PetriNetUnfolderBase]: For 1040666/1040666 co-relation queries the response was YES. [2024-06-04 15:39:23,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76338 conditions, 7113 events. 4501/7113 cut-off events. For 1040666/1040666 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 44933 event pairs, 841 based on Foata normal form. 2/7114 useless extension candidates. Maximal degree in co-relation 76141. Up to 6715 conditions per place. [2024-06-04 15:39:23,649 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 647 selfloop transitions, 44 changer transitions 0/696 dead transitions. [2024-06-04 15:39:23,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 696 transitions, 14039 flow [2024-06-04 15:39:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:39:23,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-04 15:39:23,651 INFO L175 Difference]: Start difference. First operand has 427 places, 672 transitions, 12425 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:39:23,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 696 transitions, 14039 flow [2024-06-04 15:39:28,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 696 transitions, 13861 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:28,368 INFO L231 Difference]: Finished difference. Result has 429 places, 678 transitions, 12522 flow [2024-06-04 15:39:28,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12247, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12522, PETRI_PLACES=429, PETRI_TRANSITIONS=678} [2024-06-04 15:39:28,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-04 15:39:28,368 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 678 transitions, 12522 flow [2024-06-04 15:39:28,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:28,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:28,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:28,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:39:28,369 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:28,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1228739384, now seen corresponding path program 5 times [2024-06-04 15:39:28,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:28,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351199132] [2024-06-04 15:39:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:29,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:29,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351199132] [2024-06-04 15:39:29,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351199132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:29,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:29,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:29,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195722302] [2024-06-04 15:39:29,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:29,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:29,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:29,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:29,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:29,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:39:29,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 678 transitions, 12522 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:29,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:29,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:39:29,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:31,311 INFO L124 PetriNetUnfolderBase]: 4521/7141 cut-off events. [2024-06-04 15:39:31,311 INFO L125 PetriNetUnfolderBase]: For 1071511/1071511 co-relation queries the response was YES. [2024-06-04 15:39:31,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76714 conditions, 7141 events. 4521/7141 cut-off events. For 1071511/1071511 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 45095 event pairs, 830 based on Foata normal form. 4/7144 useless extension candidates. Maximal degree in co-relation 76516. Up to 6641 conditions per place. [2024-06-04 15:39:31,446 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 640 selfloop transitions, 60 changer transitions 0/705 dead transitions. [2024-06-04 15:39:31,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 705 transitions, 14248 flow [2024-06-04 15:39:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:39:31,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 15:39:31,447 INFO L175 Difference]: Start difference. First operand has 429 places, 678 transitions, 12522 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:39:31,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 705 transitions, 14248 flow [2024-06-04 15:39:36,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 705 transitions, 14058 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:36,834 INFO L231 Difference]: Finished difference. Result has 431 places, 681 transitions, 12574 flow [2024-06-04 15:39:36,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12332, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12574, PETRI_PLACES=431, PETRI_TRANSITIONS=681} [2024-06-04 15:39:36,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-04 15:39:36,835 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 681 transitions, 12574 flow [2024-06-04 15:39:36,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:36,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:36,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:36,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:39:36,835 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:36,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash 724301775, now seen corresponding path program 4 times [2024-06-04 15:39:36,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:36,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509656348] [2024-06-04 15:39:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:36,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:37,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:37,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509656348] [2024-06-04 15:39:37,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509656348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:37,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:37,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:37,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746461304] [2024-06-04 15:39:37,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:37,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:37,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:37,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:37,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:39:37,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 681 transitions, 12574 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:37,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:37,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:39:37,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:39,762 INFO L124 PetriNetUnfolderBase]: 4528/7143 cut-off events. [2024-06-04 15:39:39,762 INFO L125 PetriNetUnfolderBase]: For 1079374/1079374 co-relation queries the response was YES. [2024-06-04 15:39:39,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76932 conditions, 7143 events. 4528/7143 cut-off events. For 1079374/1079374 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 45087 event pairs, 824 based on Foata normal form. 3/7145 useless extension candidates. Maximal degree in co-relation 76733. Up to 6703 conditions per place. [2024-06-04 15:39:39,899 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 648 selfloop transitions, 55 changer transitions 0/708 dead transitions. [2024-06-04 15:39:39,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 708 transitions, 14144 flow [2024-06-04 15:39:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:39:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:39:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-04 15:39:39,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-04 15:39:39,900 INFO L175 Difference]: Start difference. First operand has 431 places, 681 transitions, 12574 flow. Second operand 7 states and 143 transitions. [2024-06-04 15:39:39,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 708 transitions, 14144 flow [2024-06-04 15:39:44,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 708 transitions, 13917 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:44,870 INFO L231 Difference]: Finished difference. Result has 432 places, 685 transitions, 12596 flow [2024-06-04 15:39:44,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12347, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12596, PETRI_PLACES=432, PETRI_TRANSITIONS=685} [2024-06-04 15:39:44,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-04 15:39:44,871 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 685 transitions, 12596 flow [2024-06-04 15:39:44,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:44,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:44,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:44,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:39:44,871 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:44,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash 829676402, now seen corresponding path program 6 times [2024-06-04 15:39:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734410632] [2024-06-04 15:39:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:44,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:45,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:45,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734410632] [2024-06-04 15:39:45,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734410632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:45,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:45,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:45,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053862350] [2024-06-04 15:39:45,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:45,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:45,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:45,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:45,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:39:45,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 685 transitions, 12596 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:45,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:45,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:39:45,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:47,789 INFO L124 PetriNetUnfolderBase]: 4548/7184 cut-off events. [2024-06-04 15:39:47,790 INFO L125 PetriNetUnfolderBase]: For 1106027/1106027 co-relation queries the response was YES. [2024-06-04 15:39:47,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77398 conditions, 7184 events. 4548/7184 cut-off events. For 1106027/1106027 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 45489 event pairs, 735 based on Foata normal form. 4/7185 useless extension candidates. Maximal degree in co-relation 77197. Up to 5776 conditions per place. [2024-06-04 15:39:47,928 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 511 selfloop transitions, 204 changer transitions 1/721 dead transitions. [2024-06-04 15:39:47,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 721 transitions, 14909 flow [2024-06-04 15:39:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 15:39:47,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-04 15:39:47,930 INFO L175 Difference]: Start difference. First operand has 432 places, 685 transitions, 12596 flow. Second operand 9 states and 176 transitions. [2024-06-04 15:39:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 721 transitions, 14909 flow [2024-06-04 15:39:52,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 721 transitions, 14766 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 15:39:52,429 INFO L231 Difference]: Finished difference. Result has 437 places, 688 transitions, 12982 flow [2024-06-04 15:39:52,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12453, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12982, PETRI_PLACES=437, PETRI_TRANSITIONS=688} [2024-06-04 15:39:52,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 15:39:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 688 transitions, 12982 flow [2024-06-04 15:39:52,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:52,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:52,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:52,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:39:52,430 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:52,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash -133650009, now seen corresponding path program 3 times [2024-06-04 15:39:52,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:52,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322320314] [2024-06-04 15:39:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:52,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:53,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:53,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322320314] [2024-06-04 15:39:53,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322320314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:53,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:53,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:53,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10208109] [2024-06-04 15:39:53,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:53,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:53,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:53,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:39:53,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 688 transitions, 12982 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:39:53,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:53,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:39:53,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:55,473 INFO L124 PetriNetUnfolderBase]: 4545/7163 cut-off events. [2024-06-04 15:39:55,473 INFO L125 PetriNetUnfolderBase]: For 1105976/1105976 co-relation queries the response was YES. [2024-06-04 15:39:55,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78079 conditions, 7163 events. 4545/7163 cut-off events. For 1105976/1105976 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45239 event pairs, 840 based on Foata normal form. 1/7162 useless extension candidates. Maximal degree in co-relation 77877. Up to 6651 conditions per place. [2024-06-04 15:39:55,609 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 78 changer transitions 0/709 dead transitions. [2024-06-04 15:39:55,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 709 transitions, 14484 flow [2024-06-04 15:39:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:39:55,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-04 15:39:55,611 INFO L175 Difference]: Start difference. First operand has 437 places, 688 transitions, 12982 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:39:55,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 709 transitions, 14484 flow [2024-06-04 15:40:01,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 709 transitions, 14099 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:01,278 INFO L231 Difference]: Finished difference. Result has 440 places, 692 transitions, 12805 flow [2024-06-04 15:40:01,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12597, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12805, PETRI_PLACES=440, PETRI_TRANSITIONS=692} [2024-06-04 15:40:01,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 15:40:01,279 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 692 transitions, 12805 flow [2024-06-04 15:40:01,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:01,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:01,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 15:40:01,280 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:01,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 829670822, now seen corresponding path program 7 times [2024-06-04 15:40:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224559766] [2024-06-04 15:40:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:02,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:02,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224559766] [2024-06-04 15:40:02,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224559766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:02,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:02,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:02,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453490349] [2024-06-04 15:40:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:02,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:02,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:40:02,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 692 transitions, 12805 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:02,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:02,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:40:02,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:04,177 INFO L124 PetriNetUnfolderBase]: 4533/7140 cut-off events. [2024-06-04 15:40:04,177 INFO L125 PetriNetUnfolderBase]: For 1113877/1113877 co-relation queries the response was YES. [2024-06-04 15:40:04,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76785 conditions, 7140 events. 4533/7140 cut-off events. For 1113877/1113877 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 44981 event pairs, 731 based on Foata normal form. 4/7142 useless extension candidates. Maximal degree in co-relation 76582. Up to 5764 conditions per place. [2024-06-04 15:40:04,328 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 204 changer transitions 1/724 dead transitions. [2024-06-04 15:40:04,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 724 transitions, 15032 flow [2024-06-04 15:40:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-04 15:40:04,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-04 15:40:04,329 INFO L175 Difference]: Start difference. First operand has 440 places, 692 transitions, 12805 flow. Second operand 9 states and 178 transitions. [2024-06-04 15:40:04,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 724 transitions, 15032 flow [2024-06-04 15:40:10,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 724 transitions, 14904 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 15:40:10,776 INFO L231 Difference]: Finished difference. Result has 446 places, 692 transitions, 13092 flow [2024-06-04 15:40:10,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12677, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13092, PETRI_PLACES=446, PETRI_TRANSITIONS=692} [2024-06-04 15:40:10,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-04 15:40:10,777 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 692 transitions, 13092 flow [2024-06-04 15:40:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:10,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:10,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 15:40:10,779 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:10,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash 187442605, now seen corresponding path program 4 times [2024-06-04 15:40:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:10,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507909317] [2024-06-04 15:40:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507909317] [2024-06-04 15:40:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507909317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:11,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:11,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:11,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973090470] [2024-06-04 15:40:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:11,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:11,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:40:11,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 692 transitions, 13092 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:11,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:11,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:40:11,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:13,565 INFO L124 PetriNetUnfolderBase]: 4546/7172 cut-off events. [2024-06-04 15:40:13,565 INFO L125 PetriNetUnfolderBase]: For 1124879/1124879 co-relation queries the response was YES. [2024-06-04 15:40:13,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77985 conditions, 7172 events. 4546/7172 cut-off events. For 1124879/1124879 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45329 event pairs, 843 based on Foata normal form. 1/7171 useless extension candidates. Maximal degree in co-relation 77781. Up to 6634 conditions per place. [2024-06-04 15:40:13,706 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 630 selfloop transitions, 83 changer transitions 0/718 dead transitions. [2024-06-04 15:40:13,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 718 transitions, 14966 flow [2024-06-04 15:40:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:40:13,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-04 15:40:13,732 INFO L175 Difference]: Start difference. First operand has 446 places, 692 transitions, 13092 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:40:13,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 718 transitions, 14966 flow [2024-06-04 15:40:18,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 718 transitions, 14125 flow, removed 47 selfloop flow, removed 11 redundant places. [2024-06-04 15:40:18,852 INFO L231 Difference]: Finished difference. Result has 443 places, 698 transitions, 12605 flow [2024-06-04 15:40:18,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12251, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12605, PETRI_PLACES=443, PETRI_TRANSITIONS=698} [2024-06-04 15:40:18,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-04 15:40:18,853 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 698 transitions, 12605 flow [2024-06-04 15:40:18,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:18,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:18,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:18,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 15:40:18,854 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:18,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:18,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1047596637, now seen corresponding path program 5 times [2024-06-04 15:40:18,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:18,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157373934] [2024-06-04 15:40:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:18,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:19,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:19,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157373934] [2024-06-04 15:40:19,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157373934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:19,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:19,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:19,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792031526] [2024-06-04 15:40:19,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:19,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:40:19,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 698 transitions, 12605 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:19,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:19,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:40:19,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:21,646 INFO L124 PetriNetUnfolderBase]: 4551/7165 cut-off events. [2024-06-04 15:40:21,646 INFO L125 PetriNetUnfolderBase]: For 1141440/1141440 co-relation queries the response was YES. [2024-06-04 15:40:21,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76873 conditions, 7165 events. 4551/7165 cut-off events. For 1141440/1141440 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 45152 event pairs, 838 based on Foata normal form. 1/7164 useless extension candidates. Maximal degree in co-relation 76671. Up to 6660 conditions per place. [2024-06-04 15:40:21,796 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 634 selfloop transitions, 78 changer transitions 0/717 dead transitions. [2024-06-04 15:40:21,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 717 transitions, 14169 flow [2024-06-04 15:40:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:40:21,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 15:40:21,797 INFO L175 Difference]: Start difference. First operand has 443 places, 698 transitions, 12605 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:40:21,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 717 transitions, 14169 flow [2024-06-04 15:40:27,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 717 transitions, 13842 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:27,119 INFO L231 Difference]: Finished difference. Result has 446 places, 701 transitions, 12540 flow [2024-06-04 15:40:27,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12316, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12540, PETRI_PLACES=446, PETRI_TRANSITIONS=701} [2024-06-04 15:40:27,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-04 15:40:27,120 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 701 transitions, 12540 flow [2024-06-04 15:40:27,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:27,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:27,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:27,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 15:40:27,121 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:27,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 472542475, now seen corresponding path program 6 times [2024-06-04 15:40:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:27,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124535571] [2024-06-04 15:40:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:27,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:28,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:28,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124535571] [2024-06-04 15:40:28,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124535571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:28,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:28,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921981347] [2024-06-04 15:40:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:28,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:28,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:28,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:40:28,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 701 transitions, 12540 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:28,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:28,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:40:28,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:30,207 INFO L124 PetriNetUnfolderBase]: 4556/7168 cut-off events. [2024-06-04 15:40:30,207 INFO L125 PetriNetUnfolderBase]: For 1157712/1157712 co-relation queries the response was YES. [2024-06-04 15:40:30,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77112 conditions, 7168 events. 4556/7168 cut-off events. For 1157712/1157712 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45098 event pairs, 823 based on Foata normal form. 1/7164 useless extension candidates. Maximal degree in co-relation 76908. Up to 6404 conditions per place. [2024-06-04 15:40:30,354 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 168 changer transitions 0/727 dead transitions. [2024-06-04 15:40:30,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 727 transitions, 14756 flow [2024-06-04 15:40:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:40:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:40:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-04 15:40:30,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:40:30,355 INFO L175 Difference]: Start difference. First operand has 446 places, 701 transitions, 12540 flow. Second operand 7 states and 140 transitions. [2024-06-04 15:40:30,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 727 transitions, 14756 flow [2024-06-04 15:40:36,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 727 transitions, 14560 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:36,044 INFO L231 Difference]: Finished difference. Result has 448 places, 710 transitions, 13106 flow [2024-06-04 15:40:36,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12344, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13106, PETRI_PLACES=448, PETRI_TRANSITIONS=710} [2024-06-04 15:40:36,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-04 15:40:36,045 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 710 transitions, 13106 flow [2024-06-04 15:40:36,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:36,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:36,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:36,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 15:40:36,046 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:36,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:36,047 INFO L85 PathProgramCache]: Analyzing trace with hash 484922635, now seen corresponding path program 7 times [2024-06-04 15:40:36,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:36,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774279716] [2024-06-04 15:40:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:37,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:37,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774279716] [2024-06-04 15:40:37,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774279716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:37,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:37,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:37,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681098217] [2024-06-04 15:40:37,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:37,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:37,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:37,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:37,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:37,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:40:37,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 710 transitions, 13106 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:37,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:37,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:40:37,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:39,611 INFO L124 PetriNetUnfolderBase]: 4563/7180 cut-off events. [2024-06-04 15:40:39,611 INFO L125 PetriNetUnfolderBase]: For 1193301/1193301 co-relation queries the response was YES. [2024-06-04 15:40:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78255 conditions, 7180 events. 4563/7180 cut-off events. For 1193301/1193301 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 45255 event pairs, 821 based on Foata normal form. 3/7178 useless extension candidates. Maximal degree in co-relation 78049. Up to 6413 conditions per place. [2024-06-04 15:40:39,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 543 selfloop transitions, 186 changer transitions 0/734 dead transitions. [2024-06-04 15:40:39,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 734 transitions, 15222 flow [2024-06-04 15:40:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:40:39,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-04 15:40:39,729 INFO L175 Difference]: Start difference. First operand has 448 places, 710 transitions, 13106 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:40:39,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 734 transitions, 15222 flow [2024-06-04 15:40:44,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 734 transitions, 15055 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-04 15:40:44,667 INFO L231 Difference]: Finished difference. Result has 454 places, 716 transitions, 13522 flow [2024-06-04 15:40:44,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12959, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13522, PETRI_PLACES=454, PETRI_TRANSITIONS=716} [2024-06-04 15:40:44,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-04 15:40:44,667 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 716 transitions, 13522 flow [2024-06-04 15:40:44,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:44,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:44,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:44,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 15:40:44,668 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:44,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash -764675136, now seen corresponding path program 8 times [2024-06-04 15:40:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:44,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653800450] [2024-06-04 15:40:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:44,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653800450] [2024-06-04 15:40:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653800450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:45,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:45,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402724212] [2024-06-04 15:40:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:45,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:45,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:45,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:40:45,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 716 transitions, 13522 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:45,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:45,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:40:45,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:47,793 INFO L124 PetriNetUnfolderBase]: 4583/7210 cut-off events. [2024-06-04 15:40:47,793 INFO L125 PetriNetUnfolderBase]: For 1215272/1215272 co-relation queries the response was YES. [2024-06-04 15:40:47,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78889 conditions, 7210 events. 4583/7210 cut-off events. For 1215272/1215272 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 45493 event pairs, 705 based on Foata normal form. 4/7212 useless extension candidates. Maximal degree in co-relation 78681. Up to 5822 conditions per place. [2024-06-04 15:40:47,918 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 519 selfloop transitions, 223 changer transitions 1/748 dead transitions. [2024-06-04 15:40:47,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 748 transitions, 15846 flow [2024-06-04 15:40:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 15:40:47,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-04 15:40:47,919 INFO L175 Difference]: Start difference. First operand has 454 places, 716 transitions, 13522 flow. Second operand 9 states and 176 transitions. [2024-06-04 15:40:47,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 748 transitions, 15846 flow [2024-06-04 15:40:54,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 748 transitions, 15395 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:54,485 INFO L231 Difference]: Finished difference. Result has 458 places, 719 transitions, 13623 flow [2024-06-04 15:40:54,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13075, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13623, PETRI_PLACES=458, PETRI_TRANSITIONS=719} [2024-06-04 15:40:54,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-04 15:40:54,485 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 719 transitions, 13623 flow [2024-06-04 15:40:54,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:54,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:54,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:54,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 15:40:54,486 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:54,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:54,486 INFO L85 PathProgramCache]: Analyzing trace with hash 571317930, now seen corresponding path program 9 times [2024-06-04 15:40:54,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:54,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866512425] [2024-06-04 15:40:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:54,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:55,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866512425] [2024-06-04 15:40:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866512425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:55,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:55,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:55,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862766271] [2024-06-04 15:40:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:55,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:40:55,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 719 transitions, 13623 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:40:55,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:55,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:40:55,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:57,518 INFO L124 PetriNetUnfolderBase]: 4571/7190 cut-off events. [2024-06-04 15:40:57,518 INFO L125 PetriNetUnfolderBase]: For 1192195/1192195 co-relation queries the response was YES. [2024-06-04 15:40:57,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78596 conditions, 7190 events. 4571/7190 cut-off events. For 1192195/1192195 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 45328 event pairs, 707 based on Foata normal form. 4/7192 useless extension candidates. Maximal degree in co-relation 78388. Up to 5814 conditions per place. [2024-06-04 15:40:57,645 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 521 selfloop transitions, 223 changer transitions 1/750 dead transitions. [2024-06-04 15:40:57,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 750 transitions, 15907 flow [2024-06-04 15:40:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-04 15:40:57,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-04 15:40:57,646 INFO L175 Difference]: Start difference. First operand has 458 places, 719 transitions, 13623 flow. Second operand 9 states and 178 transitions. [2024-06-04 15:40:57,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 750 transitions, 15907 flow [2024-06-04 15:41:04,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 750 transitions, 15527 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:04,371 INFO L231 Difference]: Finished difference. Result has 461 places, 719 transitions, 13696 flow [2024-06-04 15:41:04,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13243, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13696, PETRI_PLACES=461, PETRI_TRANSITIONS=719} [2024-06-04 15:41:04,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-04 15:41:04,372 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 719 transitions, 13696 flow [2024-06-04 15:41:04,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:41:04,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:04,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:04,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 15:41:04,373 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:04,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1112647257, now seen corresponding path program 8 times [2024-06-04 15:41:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:04,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386014961] [2024-06-04 15:41:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:05,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386014961] [2024-06-04 15:41:05,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386014961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:05,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:05,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:05,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889446770] [2024-06-04 15:41:05,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:05,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:05,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:05,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:41:05,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 719 transitions, 13696 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:05,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:05,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:41:05,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:07,545 INFO L124 PetriNetUnfolderBase]: 4610/7257 cut-off events. [2024-06-04 15:41:07,545 INFO L125 PetriNetUnfolderBase]: For 1226484/1226484 co-relation queries the response was YES. [2024-06-04 15:41:07,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79698 conditions, 7257 events. 4610/7257 cut-off events. For 1226484/1226484 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 45906 event pairs, 986 based on Foata normal form. 3/7259 useless extension candidates. Maximal degree in co-relation 79489. Up to 6793 conditions per place. [2024-06-04 15:41:07,697 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 685 selfloop transitions, 62 changer transitions 1/753 dead transitions. [2024-06-04 15:41:07,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 753 transitions, 15906 flow [2024-06-04 15:41:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:41:07,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:41:07,698 INFO L175 Difference]: Start difference. First operand has 461 places, 719 transitions, 13696 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:41:07,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 753 transitions, 15906 flow [2024-06-04 15:41:14,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 753 transitions, 15085 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-04 15:41:14,802 INFO L231 Difference]: Finished difference. Result has 461 places, 732 transitions, 13437 flow [2024-06-04 15:41:14,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12875, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13437, PETRI_PLACES=461, PETRI_TRANSITIONS=732} [2024-06-04 15:41:14,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-04 15:41:14,803 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 732 transitions, 13437 flow [2024-06-04 15:41:14,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:14,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:14,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 15:41:14,804 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:14,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1112943927, now seen corresponding path program 9 times [2024-06-04 15:41:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:14,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548299258] [2024-06-04 15:41:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548299258] [2024-06-04 15:41:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548299258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:15,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:15,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:15,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423822871] [2024-06-04 15:41:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:15,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:15,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:15,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:41:15,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 732 transitions, 13437 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:15,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:15,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:41:15,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:18,034 INFO L124 PetriNetUnfolderBase]: 4612/7260 cut-off events. [2024-06-04 15:41:18,034 INFO L125 PetriNetUnfolderBase]: For 1243386/1243386 co-relation queries the response was YES. [2024-06-04 15:41:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78797 conditions, 7260 events. 4612/7260 cut-off events. For 1243386/1243386 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 45850 event pairs, 987 based on Foata normal form. 6/7265 useless extension candidates. Maximal degree in co-relation 78587. Up to 6799 conditions per place. [2024-06-04 15:41:18,180 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 692 selfloop transitions, 58 changer transitions 0/755 dead transitions. [2024-06-04 15:41:18,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 755 transitions, 15145 flow [2024-06-04 15:41:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:41:18,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:41:18,182 INFO L175 Difference]: Start difference. First operand has 461 places, 732 transitions, 13437 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:41:18,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 755 transitions, 15145 flow [2024-06-04 15:41:23,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 755 transitions, 14838 flow, removed 135 selfloop flow, removed 4 redundant places. [2024-06-04 15:41:23,924 INFO L231 Difference]: Finished difference. Result has 466 places, 736 transitions, 13390 flow [2024-06-04 15:41:23,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13130, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13390, PETRI_PLACES=466, PETRI_TRANSITIONS=736} [2024-06-04 15:41:23,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-04 15:41:23,925 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 736 transitions, 13390 flow [2024-06-04 15:41:23,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:23,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:23,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 15:41:23,926 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:23,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash -149177626, now seen corresponding path program 10 times [2024-06-04 15:41:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:23,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437580336] [2024-06-04 15:41:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:23,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:24,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:24,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437580336] [2024-06-04 15:41:24,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437580336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:24,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:24,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:24,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991256124] [2024-06-04 15:41:24,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:24,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:24,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:24,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:24,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:41:24,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 736 transitions, 13390 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:41:24,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:24,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:41:24,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:27,014 INFO L124 PetriNetUnfolderBase]: 4600/7244 cut-off events. [2024-06-04 15:41:27,014 INFO L125 PetriNetUnfolderBase]: For 1226287/1226287 co-relation queries the response was YES. [2024-06-04 15:41:27,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78694 conditions, 7244 events. 4600/7244 cut-off events. For 1226287/1226287 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 45812 event pairs, 961 based on Foata normal form. 4/7247 useless extension candidates. Maximal degree in co-relation 78482. Up to 6707 conditions per place. [2024-06-04 15:41:27,150 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 685 selfloop transitions, 69 changer transitions 0/759 dead transitions. [2024-06-04 15:41:27,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 759 transitions, 15257 flow [2024-06-04 15:41:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:41:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:41:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-04 15:41:27,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:41:27,152 INFO L175 Difference]: Start difference. First operand has 466 places, 736 transitions, 13390 flow. Second operand 10 states and 185 transitions. [2024-06-04 15:41:27,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 759 transitions, 15257 flow [2024-06-04 15:41:33,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 759 transitions, 14947 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:33,234 INFO L231 Difference]: Finished difference. Result has 469 places, 736 transitions, 13240 flow [2024-06-04 15:41:33,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13094, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13240, PETRI_PLACES=469, PETRI_TRANSITIONS=736} [2024-06-04 15:41:33,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-04 15:41:33,235 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 736 transitions, 13240 flow [2024-06-04 15:41:33,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:41:33,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:33,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:33,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 15:41:33,236 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:33,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash -157891726, now seen corresponding path program 11 times [2024-06-04 15:41:33,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143510734] [2024-06-04 15:41:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:33,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:34,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:34,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143510734] [2024-06-04 15:41:34,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143510734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:34,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:34,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497137848] [2024-06-04 15:41:34,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:34,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:34,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:34,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:34,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:41:34,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 736 transitions, 13240 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:41:34,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:34,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:41:34,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:36,448 INFO L124 PetriNetUnfolderBase]: 4588/7232 cut-off events. [2024-06-04 15:41:36,448 INFO L125 PetriNetUnfolderBase]: For 1217369/1217369 co-relation queries the response was YES. [2024-06-04 15:41:36,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77873 conditions, 7232 events. 4588/7232 cut-off events. For 1217369/1217369 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 45730 event pairs, 949 based on Foata normal form. 4/7235 useless extension candidates. Maximal degree in co-relation 77660. Up to 6699 conditions per place. [2024-06-04 15:41:36,588 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 684 selfloop transitions, 69 changer transitions 0/758 dead transitions. [2024-06-04 15:41:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 758 transitions, 14861 flow [2024-06-04 15:41:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:41:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:41:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 15:41:36,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-04 15:41:36,604 INFO L175 Difference]: Start difference. First operand has 469 places, 736 transitions, 13240 flow. Second operand 10 states and 184 transitions. [2024-06-04 15:41:36,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 758 transitions, 14861 flow [2024-06-04 15:41:42,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 758 transitions, 14605 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-04 15:41:42,298 INFO L231 Difference]: Finished difference. Result has 469 places, 736 transitions, 13131 flow [2024-06-04 15:41:42,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12984, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13131, PETRI_PLACES=469, PETRI_TRANSITIONS=736} [2024-06-04 15:41:42,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-04 15:41:42,299 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 736 transitions, 13131 flow [2024-06-04 15:41:42,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:41:42,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:42,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 15:41:42,300 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:42,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1187161241, now seen corresponding path program 10 times [2024-06-04 15:41:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:42,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766358220] [2024-06-04 15:41:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:43,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766358220] [2024-06-04 15:41:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766358220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:43,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:43,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437455634] [2024-06-04 15:41:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:43,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:41:43,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 736 transitions, 13131 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:43,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:43,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:41:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:45,373 INFO L124 PetriNetUnfolderBase]: 4607/7251 cut-off events. [2024-06-04 15:41:45,373 INFO L125 PetriNetUnfolderBase]: For 1244563/1244563 co-relation queries the response was YES. [2024-06-04 15:41:45,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78049 conditions, 7251 events. 4607/7251 cut-off events. For 1244563/1244563 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 45743 event pairs, 1023 based on Foata normal form. 7/7257 useless extension candidates. Maximal degree in co-relation 77835. Up to 6744 conditions per place. [2024-06-04 15:41:45,513 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 682 selfloop transitions, 72 changer transitions 1/760 dead transitions. [2024-06-04 15:41:45,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 760 transitions, 14946 flow [2024-06-04 15:41:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:41:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:41:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-04 15:41:45,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-04 15:41:45,515 INFO L175 Difference]: Start difference. First operand has 469 places, 736 transitions, 13131 flow. Second operand 11 states and 190 transitions. [2024-06-04 15:41:45,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 760 transitions, 14946 flow [2024-06-04 15:41:51,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 760 transitions, 14664 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-04 15:41:51,269 INFO L231 Difference]: Finished difference. Result has 470 places, 741 transitions, 13194 flow [2024-06-04 15:41:51,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12849, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13194, PETRI_PLACES=470, PETRI_TRANSITIONS=741} [2024-06-04 15:41:51,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-04 15:41:51,270 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 741 transitions, 13194 flow [2024-06-04 15:41:51,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:51,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:51,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:51,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 15:41:51,271 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:51,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 829805421, now seen corresponding path program 2 times [2024-06-04 15:41:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:51,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88660589] [2024-06-04 15:41:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:52,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88660589] [2024-06-04 15:41:52,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88660589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:52,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:52,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:52,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460838533] [2024-06-04 15:41:52,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:52,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:41:52,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 741 transitions, 13194 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:41:52,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:52,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:41:52,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:54,271 INFO L124 PetriNetUnfolderBase]: 4622/7280 cut-off events. [2024-06-04 15:41:54,271 INFO L125 PetriNetUnfolderBase]: For 1241949/1241949 co-relation queries the response was YES. [2024-06-04 15:41:54,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79022 conditions, 7280 events. 4622/7280 cut-off events. For 1241949/1241949 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46040 event pairs, 796 based on Foata normal form. 3/7282 useless extension candidates. Maximal degree in co-relation 78808. Up to 6755 conditions per place. [2024-06-04 15:41:54,409 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 680 selfloop transitions, 82 changer transitions 0/767 dead transitions. [2024-06-04 15:41:54,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 767 transitions, 15045 flow [2024-06-04 15:41:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:41:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:41:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-04 15:41:54,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-06-04 15:41:54,410 INFO L175 Difference]: Start difference. First operand has 470 places, 741 transitions, 13194 flow. Second operand 6 states and 125 transitions. [2024-06-04 15:41:54,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 767 transitions, 15045 flow [2024-06-04 15:42:01,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 767 transitions, 14529 flow, removed 141 selfloop flow, removed 13 redundant places. [2024-06-04 15:42:01,674 INFO L231 Difference]: Finished difference. Result has 463 places, 749 transitions, 13155 flow [2024-06-04 15:42:01,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12678, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13155, PETRI_PLACES=463, PETRI_TRANSITIONS=749} [2024-06-04 15:42:01,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-04 15:42:01,675 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 749 transitions, 13155 flow [2024-06-04 15:42:01,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:01,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:01,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:01,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 15:42:01,676 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:01,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1282183635, now seen corresponding path program 3 times [2024-06-04 15:42:01,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:01,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387567337] [2024-06-04 15:42:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:01,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:02,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:02,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387567337] [2024-06-04 15:42:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387567337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086433894] [2024-06-04 15:42:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:02,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:42:02,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 749 transitions, 13155 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:02,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:02,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:42:02,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:04,650 INFO L124 PetriNetUnfolderBase]: 4636/7303 cut-off events. [2024-06-04 15:42:04,650 INFO L125 PetriNetUnfolderBase]: For 1246565/1246565 co-relation queries the response was YES. [2024-06-04 15:42:04,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79020 conditions, 7303 events. 4636/7303 cut-off events. For 1246565/1246565 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 46129 event pairs, 793 based on Foata normal form. 4/7306 useless extension candidates. Maximal degree in co-relation 78810. Up to 6514 conditions per place. [2024-06-04 15:42:04,791 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 637 selfloop transitions, 140 changer transitions 0/782 dead transitions. [2024-06-04 15:42:04,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 782 transitions, 15308 flow [2024-06-04 15:42:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-04 15:42:04,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-04 15:42:04,792 INFO L175 Difference]: Start difference. First operand has 463 places, 749 transitions, 13155 flow. Second operand 7 states and 150 transitions. [2024-06-04 15:42:04,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 782 transitions, 15308 flow [2024-06-04 15:42:09,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 782 transitions, 14957 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:09,997 INFO L231 Difference]: Finished difference. Result has 466 places, 758 transitions, 13504 flow [2024-06-04 15:42:09,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12818, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13504, PETRI_PLACES=466, PETRI_TRANSITIONS=758} [2024-06-04 15:42:09,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-04 15:42:09,998 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 758 transitions, 13504 flow [2024-06-04 15:42:09,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:09,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:09,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:09,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 15:42:09,999 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:09,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:09,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1187012286, now seen corresponding path program 12 times [2024-06-04 15:42:09,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:09,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421887248] [2024-06-04 15:42:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:10,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:10,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421887248] [2024-06-04 15:42:10,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421887248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:10,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:10,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401546005] [2024-06-04 15:42:10,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:10,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:10,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:10,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:42:10,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 758 transitions, 13504 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:10,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:10,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:42:10,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:13,181 INFO L124 PetriNetUnfolderBase]: 4624/7295 cut-off events. [2024-06-04 15:42:13,182 INFO L125 PetriNetUnfolderBase]: For 1230599/1230599 co-relation queries the response was YES. [2024-06-04 15:42:13,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78977 conditions, 7295 events. 4624/7295 cut-off events. For 1230599/1230599 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 46241 event pairs, 767 based on Foata normal form. 4/7298 useless extension candidates. Maximal degree in co-relation 78766. Up to 6451 conditions per place. [2024-06-04 15:42:13,311 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 673 selfloop transitions, 112 changer transitions 1/791 dead transitions. [2024-06-04 15:42:13,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 791 transitions, 15626 flow [2024-06-04 15:42:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:42:13,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:42:13,313 INFO L175 Difference]: Start difference. First operand has 466 places, 758 transitions, 13504 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:42:13,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 791 transitions, 15626 flow [2024-06-04 15:42:21,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 791 transitions, 15348 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:21,175 INFO L231 Difference]: Finished difference. Result has 470 places, 758 transitions, 13460 flow [2024-06-04 15:42:21,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13230, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13460, PETRI_PLACES=470, PETRI_TRANSITIONS=758} [2024-06-04 15:42:21,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-04 15:42:21,175 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 758 transitions, 13460 flow [2024-06-04 15:42:21,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:21,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:21,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 15:42:21,176 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:21,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1195726386, now seen corresponding path program 13 times [2024-06-04 15:42:21,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:21,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126702738] [2024-06-04 15:42:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:21,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:21,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:21,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126702738] [2024-06-04 15:42:21,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126702738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:21,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:21,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:21,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327449085] [2024-06-04 15:42:21,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:21,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:21,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:21,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:21,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:42:21,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 758 transitions, 13460 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:21,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:21,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:42:21,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:24,101 INFO L124 PetriNetUnfolderBase]: 4644/7335 cut-off events. [2024-06-04 15:42:24,102 INFO L125 PetriNetUnfolderBase]: For 1214608/1214608 co-relation queries the response was YES. [2024-06-04 15:42:24,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79020 conditions, 7335 events. 4644/7335 cut-off events. For 1214608/1214608 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 46593 event pairs, 777 based on Foata normal form. 4/7338 useless extension candidates. Maximal degree in co-relation 78809. Up to 6467 conditions per place. [2024-06-04 15:42:24,238 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 683 selfloop transitions, 106 changer transitions 1/795 dead transitions. [2024-06-04 15:42:24,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 795 transitions, 15684 flow [2024-06-04 15:42:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:42:24,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:42:24,240 INFO L175 Difference]: Start difference. First operand has 470 places, 758 transitions, 13460 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:42:24,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 795 transitions, 15684 flow [2024-06-04 15:42:31,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 795 transitions, 15489 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:31,999 INFO L231 Difference]: Finished difference. Result has 472 places, 761 transitions, 13566 flow [2024-06-04 15:42:32,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13271, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13566, PETRI_PLACES=472, PETRI_TRANSITIONS=761} [2024-06-04 15:42:32,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-04 15:42:32,000 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 761 transitions, 13566 flow [2024-06-04 15:42:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:32,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:32,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:32,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 15:42:32,001 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:32,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2131907914, now seen corresponding path program 14 times [2024-06-04 15:42:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:32,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782516566] [2024-06-04 15:42:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:32,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:32,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782516566] [2024-06-04 15:42:32,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782516566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:32,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:32,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:32,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361459106] [2024-06-04 15:42:32,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:32,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:32,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:32,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:32,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:32,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:42:32,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 761 transitions, 13566 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:32,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:32,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:42:32,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:34,988 INFO L124 PetriNetUnfolderBase]: 4664/7352 cut-off events. [2024-06-04 15:42:34,989 INFO L125 PetriNetUnfolderBase]: For 1233663/1233663 co-relation queries the response was YES. [2024-06-04 15:42:35,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79423 conditions, 7352 events. 4664/7352 cut-off events. For 1233663/1233663 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 46560 event pairs, 829 based on Foata normal form. 4/7355 useless extension candidates. Maximal degree in co-relation 79212. Up to 6935 conditions per place. [2024-06-04 15:42:35,344 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 744 selfloop transitions, 34 changer transitions 0/783 dead transitions. [2024-06-04 15:42:35,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 783 transitions, 15359 flow [2024-06-04 15:42:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:42:35,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 15:42:35,346 INFO L175 Difference]: Start difference. First operand has 472 places, 761 transitions, 13566 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:42:35,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 783 transitions, 15359 flow [2024-06-04 15:42:42,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 783 transitions, 15131 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:42,688 INFO L231 Difference]: Finished difference. Result has 473 places, 764 transitions, 13501 flow [2024-06-04 15:42:42,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13341, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13501, PETRI_PLACES=473, PETRI_TRANSITIONS=764} [2024-06-04 15:42:42,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-04 15:42:42,689 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 764 transitions, 13501 flow [2024-06-04 15:42:42,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:42,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:42,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:42,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 15:42:42,689 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:42,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:42,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2131640787, now seen corresponding path program 4 times [2024-06-04 15:42:42,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:42,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862070075] [2024-06-04 15:42:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:42,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:43,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862070075] [2024-06-04 15:42:43,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862070075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:43,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:43,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54019754] [2024-06-04 15:42:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:43,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:43,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:43,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:43,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:43,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:42:43,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 764 transitions, 13501 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:43,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:43,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:42:43,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:45,745 INFO L124 PetriNetUnfolderBase]: 4676/7370 cut-off events. [2024-06-04 15:42:45,745 INFO L125 PetriNetUnfolderBase]: For 1245013/1245013 co-relation queries the response was YES. [2024-06-04 15:42:45,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79257 conditions, 7370 events. 4676/7370 cut-off events. For 1245013/1245013 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 46688 event pairs, 805 based on Foata normal form. 4/7373 useless extension candidates. Maximal degree in co-relation 79045. Up to 6890 conditions per place. [2024-06-04 15:42:45,889 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 721 selfloop transitions, 61 changer transitions 0/787 dead transitions. [2024-06-04 15:42:45,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 787 transitions, 15373 flow [2024-06-04 15:42:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 15:42:45,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-04 15:42:45,891 INFO L175 Difference]: Start difference. First operand has 473 places, 764 transitions, 13501 flow. Second operand 7 states and 136 transitions. [2024-06-04 15:42:45,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 787 transitions, 15373 flow [2024-06-04 15:42:53,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 787 transitions, 15257 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:53,325 INFO L231 Difference]: Finished difference. Result has 474 places, 770 transitions, 13733 flow [2024-06-04 15:42:53,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13385, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13733, PETRI_PLACES=474, PETRI_TRANSITIONS=770} [2024-06-04 15:42:53,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-04 15:42:53,335 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 770 transitions, 13733 flow [2024-06-04 15:42:53,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:53,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:53,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:53,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 15:42:53,335 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:53,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2139259564, now seen corresponding path program 15 times [2024-06-04 15:42:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583155864] [2024-06-04 15:42:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:53,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:54,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:54,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583155864] [2024-06-04 15:42:54,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583155864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:54,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:54,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:54,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292177386] [2024-06-04 15:42:54,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:54,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:54,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:54,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:54,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:42:54,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 770 transitions, 13733 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:42:54,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:54,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:42:54,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:56,333 INFO L124 PetriNetUnfolderBase]: 4664/7351 cut-off events. [2024-06-04 15:42:56,334 INFO L125 PetriNetUnfolderBase]: For 1239598/1239598 co-relation queries the response was YES. [2024-06-04 15:42:56,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79065 conditions, 7351 events. 4664/7351 cut-off events. For 1239598/1239598 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46623 event pairs, 811 based on Foata normal form. 4/7354 useless extension candidates. Maximal degree in co-relation 78852. Up to 6861 conditions per place. [2024-06-04 15:42:56,480 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 735 selfloop transitions, 55 changer transitions 0/795 dead transitions. [2024-06-04 15:42:56,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 795 transitions, 15546 flow [2024-06-04 15:42:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:42:56,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:42:56,481 INFO L175 Difference]: Start difference. First operand has 474 places, 770 transitions, 13733 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:42:56,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 795 transitions, 15546 flow [2024-06-04 15:43:05,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 795 transitions, 15271 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:05,300 INFO L231 Difference]: Finished difference. Result has 476 places, 770 transitions, 13574 flow [2024-06-04 15:43:05,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13458, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13574, PETRI_PLACES=476, PETRI_TRANSITIONS=770} [2024-06-04 15:43:05,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-04 15:43:05,301 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 770 transitions, 13574 flow [2024-06-04 15:43:05,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 15:43:05,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:05,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:05,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 15:43:05,302 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:05,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2083302899, now seen corresponding path program 4 times [2024-06-04 15:43:05,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:05,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450348107] [2024-06-04 15:43:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:05,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450348107] [2024-06-04 15:43:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450348107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:06,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:06,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335879592] [2024-06-04 15:43:06,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:06,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:06,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:06,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:43:06,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 770 transitions, 13574 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:06,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:06,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:43:06,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:08,474 INFO L124 PetriNetUnfolderBase]: 4667/7347 cut-off events. [2024-06-04 15:43:08,474 INFO L125 PetriNetUnfolderBase]: For 1209743/1209743 co-relation queries the response was YES. [2024-06-04 15:43:08,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78548 conditions, 7347 events. 4667/7347 cut-off events. For 1209743/1209743 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46458 event pairs, 804 based on Foata normal form. 2/7347 useless extension candidates. Maximal degree in co-relation 78335. Up to 6904 conditions per place. [2024-06-04 15:43:08,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 724 selfloop transitions, 64 changer transitions 0/793 dead transitions. [2024-06-04 15:43:08,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 793 transitions, 15236 flow [2024-06-04 15:43:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:43:08,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:43:08,614 INFO L175 Difference]: Start difference. First operand has 476 places, 770 transitions, 13574 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:43:08,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 793 transitions, 15236 flow [2024-06-04 15:43:15,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 793 transitions, 14986 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:15,575 INFO L231 Difference]: Finished difference. Result has 479 places, 773 transitions, 13513 flow [2024-06-04 15:43:15,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13324, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13513, PETRI_PLACES=479, PETRI_TRANSITIONS=773} [2024-06-04 15:43:15,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-04 15:43:15,575 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 773 transitions, 13513 flow [2024-06-04 15:43:15,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:15,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:15,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:15,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 15:43:15,576 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:15,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:15,577 INFO L85 PathProgramCache]: Analyzing trace with hash 483059690, now seen corresponding path program 1 times [2024-06-04 15:43:15,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:15,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308868998] [2024-06-04 15:43:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:15,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:16,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308868998] [2024-06-04 15:43:16,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308868998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:16,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:16,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:16,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114123715] [2024-06-04 15:43:16,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:16,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:16,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:16,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:43:16,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 773 transitions, 13513 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:16,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:16,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:43:16,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:19,339 INFO L124 PetriNetUnfolderBase]: 5370/8445 cut-off events. [2024-06-04 15:43:19,339 INFO L125 PetriNetUnfolderBase]: For 2197950/2197950 co-relation queries the response was YES. [2024-06-04 15:43:19,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98825 conditions, 8445 events. 5370/8445 cut-off events. For 2197950/2197950 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 53586 event pairs, 773 based on Foata normal form. 56/8496 useless extension candidates. Maximal degree in co-relation 98611. Up to 3881 conditions per place. [2024-06-04 15:43:19,502 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 415 selfloop transitions, 408 changer transitions 8/836 dead transitions. [2024-06-04 15:43:19,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 836 transitions, 17263 flow [2024-06-04 15:43:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 15:43:19,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-04 15:43:19,504 INFO L175 Difference]: Start difference. First operand has 479 places, 773 transitions, 13513 flow. Second operand 10 states and 219 transitions. [2024-06-04 15:43:19,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 836 transitions, 17263 flow [2024-06-04 15:43:29,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 836 transitions, 17149 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:29,965 INFO L231 Difference]: Finished difference. Result has 485 places, 771 transitions, 14428 flow [2024-06-04 15:43:29,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13399, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14428, PETRI_PLACES=485, PETRI_TRANSITIONS=771} [2024-06-04 15:43:29,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-04 15:43:29,966 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 771 transitions, 14428 flow [2024-06-04 15:43:29,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:29,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:29,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:29,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 15:43:29,967 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:29,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash 484937360, now seen corresponding path program 2 times [2024-06-04 15:43:29,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:29,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620883971] [2024-06-04 15:43:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:29,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:31,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:31,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620883971] [2024-06-04 15:43:31,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620883971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:31,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:31,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244882935] [2024-06-04 15:43:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:31,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:31,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:31,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:43:31,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 771 transitions, 14428 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:31,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:31,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:43:31,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:34,743 INFO L124 PetriNetUnfolderBase]: 5465/8591 cut-off events. [2024-06-04 15:43:34,743 INFO L125 PetriNetUnfolderBase]: For 2368811/2368811 co-relation queries the response was YES. [2024-06-04 15:43:34,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104332 conditions, 8591 events. 5465/8591 cut-off events. For 2368811/2368811 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 54503 event pairs, 1035 based on Foata normal form. 68/8653 useless extension candidates. Maximal degree in co-relation 104115. Up to 6669 conditions per place. [2024-06-04 15:43:34,896 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 571 selfloop transitions, 293 changer transitions 10/879 dead transitions. [2024-06-04 15:43:34,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 879 transitions, 18207 flow [2024-06-04 15:43:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-04 15:43:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-04 15:43:34,897 INFO L175 Difference]: Start difference. First operand has 485 places, 771 transitions, 14428 flow. Second operand 9 states and 186 transitions. [2024-06-04 15:43:34,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 879 transitions, 18207 flow [2024-06-04 15:43:44,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 879 transitions, 17478 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:44,911 INFO L231 Difference]: Finished difference. Result has 489 places, 822 transitions, 15725 flow [2024-06-04 15:43:44,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13797, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15725, PETRI_PLACES=489, PETRI_TRANSITIONS=822} [2024-06-04 15:43:44,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-04 15:43:44,912 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 822 transitions, 15725 flow [2024-06-04 15:43:44,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:44,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:44,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:44,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 15:43:44,913 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:44,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:44,913 INFO L85 PathProgramCache]: Analyzing trace with hash 484933640, now seen corresponding path program 3 times [2024-06-04 15:43:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:44,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255619071] [2024-06-04 15:43:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:44,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:45,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:45,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255619071] [2024-06-04 15:43:45,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255619071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:45,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:45,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:45,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554955293] [2024-06-04 15:43:45,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:45,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:45,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:46,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:43:46,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 822 transitions, 15725 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:46,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:46,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:43:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:49,556 INFO L124 PetriNetUnfolderBase]: 5576/8799 cut-off events. [2024-06-04 15:43:49,556 INFO L125 PetriNetUnfolderBase]: For 2393494/2393494 co-relation queries the response was YES. [2024-06-04 15:43:49,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109383 conditions, 8799 events. 5576/8799 cut-off events. For 2393494/2393494 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 56354 event pairs, 988 based on Foata normal form. 56/8849 useless extension candidates. Maximal degree in co-relation 109162. Up to 6643 conditions per place. [2024-06-04 15:43:49,725 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 579 selfloop transitions, 299 changer transitions 0/883 dead transitions. [2024-06-04 15:43:49,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 883 transitions, 18933 flow [2024-06-04 15:43:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 15:43:49,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-04 15:43:49,727 INFO L175 Difference]: Start difference. First operand has 489 places, 822 transitions, 15725 flow. Second operand 9 states and 193 transitions. [2024-06-04 15:43:49,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 883 transitions, 18933 flow [2024-06-04 15:43:59,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 883 transitions, 18751 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-04 15:43:59,493 INFO L231 Difference]: Finished difference. Result has 495 places, 825 transitions, 16288 flow [2024-06-04 15:43:59,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15544, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16288, PETRI_PLACES=495, PETRI_TRANSITIONS=825} [2024-06-04 15:43:59,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-04 15:43:59,494 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 825 transitions, 16288 flow [2024-06-04 15:43:59,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:59,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:59,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:59,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 15:43:59,494 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:59,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash -149315576, now seen corresponding path program 4 times [2024-06-04 15:43:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:59,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656282305] [2024-06-04 15:43:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:59,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:00,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:00,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656282305] [2024-06-04 15:44:00,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656282305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:00,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:00,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801023672] [2024-06-04 15:44:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:00,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:00,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:44:00,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 825 transitions, 16288 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:00,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:00,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:44:00,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:04,529 INFO L124 PetriNetUnfolderBase]: 5790/9128 cut-off events. [2024-06-04 15:44:04,529 INFO L125 PetriNetUnfolderBase]: For 2307685/2307685 co-relation queries the response was YES. [2024-06-04 15:44:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116391 conditions, 9128 events. 5790/9128 cut-off events. For 2307685/2307685 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 58721 event pairs, 1620 based on Foata normal form. 16/9143 useless extension candidates. Maximal degree in co-relation 116167. Up to 8291 conditions per place. [2024-06-04 15:44:04,709 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 775 selfloop transitions, 84 changer transitions 0/864 dead transitions. [2024-06-04 15:44:04,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 864 transitions, 18968 flow [2024-06-04 15:44:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:44:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:44:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-04 15:44:04,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-04 15:44:04,711 INFO L175 Difference]: Start difference. First operand has 495 places, 825 transitions, 16288 flow. Second operand 11 states and 205 transitions. [2024-06-04 15:44:04,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 864 transitions, 18968 flow [2024-06-04 15:44:15,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 864 transitions, 18350 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:15,406 INFO L231 Difference]: Finished difference. Result has 501 places, 832 transitions, 16111 flow [2024-06-04 15:44:15,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15670, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16111, PETRI_PLACES=501, PETRI_TRANSITIONS=832} [2024-06-04 15:44:15,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-04 15:44:15,407 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 832 transitions, 16111 flow [2024-06-04 15:44:15,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:15,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:15,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:15,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 15:44:15,408 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:15,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash -149311856, now seen corresponding path program 5 times [2024-06-04 15:44:15,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:15,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361837799] [2024-06-04 15:44:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:15,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:16,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361837799] [2024-06-04 15:44:16,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361837799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:16,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:16,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:16,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698792828] [2024-06-04 15:44:16,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:16,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:16,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:16,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:16,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:44:16,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 832 transitions, 16111 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:16,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:16,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:44:16,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:20,418 INFO L124 PetriNetUnfolderBase]: 5999/9477 cut-off events. [2024-06-04 15:44:20,418 INFO L125 PetriNetUnfolderBase]: For 2755280/2755280 co-relation queries the response was YES. [2024-06-04 15:44:20,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118151 conditions, 9477 events. 5999/9477 cut-off events. For 2755280/2755280 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 61516 event pairs, 1699 based on Foata normal form. 80/9556 useless extension candidates. Maximal degree in co-relation 117925. Up to 8446 conditions per place. [2024-06-04 15:44:20,596 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 759 selfloop transitions, 93 changer transitions 11/868 dead transitions. [2024-06-04 15:44:20,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 868 transitions, 18505 flow [2024-06-04 15:44:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:44:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:44:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-04 15:44:20,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-04 15:44:20,598 INFO L175 Difference]: Start difference. First operand has 501 places, 832 transitions, 16111 flow. Second operand 12 states and 225 transitions. [2024-06-04 15:44:20,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 868 transitions, 18505 flow [2024-06-04 15:44:34,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 868 transitions, 18366 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:34,605 INFO L231 Difference]: Finished difference. Result has 507 places, 826 transitions, 16200 flow [2024-06-04 15:44:34,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15972, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16200, PETRI_PLACES=507, PETRI_TRANSITIONS=826} [2024-06-04 15:44:34,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-04 15:44:34,606 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 826 transitions, 16200 flow [2024-06-04 15:44:34,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:34,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:34,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:34,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 15:44:34,606 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:34,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:34,607 INFO L85 PathProgramCache]: Analyzing trace with hash -143590124, now seen corresponding path program 1 times [2024-06-04 15:44:34,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:34,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568911227] [2024-06-04 15:44:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:35,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:35,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568911227] [2024-06-04 15:44:35,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568911227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:35,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:35,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:35,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753435591] [2024-06-04 15:44:35,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:35,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:35,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:35,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:35,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:35,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:44:35,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 826 transitions, 16200 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:35,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:35,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:44:35,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:39,426 INFO L124 PetriNetUnfolderBase]: 6043/9531 cut-off events. [2024-06-04 15:44:39,426 INFO L125 PetriNetUnfolderBase]: For 2474625/2474625 co-relation queries the response was YES. [2024-06-04 15:44:39,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122706 conditions, 9531 events. 6043/9531 cut-off events. For 2474625/2474625 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61971 event pairs, 1692 based on Foata normal form. 14/9544 useless extension candidates. Maximal degree in co-relation 122478. Up to 8806 conditions per place. [2024-06-04 15:44:39,616 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 819 selfloop transitions, 39 changer transitions 0/863 dead transitions. [2024-06-04 15:44:39,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 863 transitions, 18728 flow [2024-06-04 15:44:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 15:44:39,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-04 15:44:39,617 INFO L175 Difference]: Start difference. First operand has 507 places, 826 transitions, 16200 flow. Second operand 10 states and 186 transitions. [2024-06-04 15:44:39,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 863 transitions, 18728 flow [2024-06-04 15:44:50,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 863 transitions, 18463 flow, removed 40 selfloop flow, removed 12 redundant places. [2024-06-04 15:44:50,389 INFO L231 Difference]: Finished difference. Result has 506 places, 830 transitions, 16168 flow [2024-06-04 15:44:50,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15935, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16168, PETRI_PLACES=506, PETRI_TRANSITIONS=830} [2024-06-04 15:44:50,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-04 15:44:50,390 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 830 transitions, 16168 flow [2024-06-04 15:44:50,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:50,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:50,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:50,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 15:44:50,390 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:50,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash -13676058, now seen corresponding path program 2 times [2024-06-04 15:44:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:50,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391292466] [2024-06-04 15:44:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:51,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:51,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391292466] [2024-06-04 15:44:51,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391292466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:51,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:51,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:51,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156500122] [2024-06-04 15:44:51,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:51,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:51,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:44:51,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 830 transitions, 16168 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:51,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:51,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:44:51,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:55,127 INFO L124 PetriNetUnfolderBase]: 6135/9697 cut-off events. [2024-06-04 15:44:55,127 INFO L125 PetriNetUnfolderBase]: For 2604064/2604064 co-relation queries the response was YES. [2024-06-04 15:44:55,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124177 conditions, 9697 events. 6135/9697 cut-off events. For 2604064/2604064 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 63322 event pairs, 1748 based on Foata normal form. 26/9722 useless extension candidates. Maximal degree in co-relation 123948. Up to 9074 conditions per place. [2024-06-04 15:44:55,450 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 805 selfloop transitions, 51 changer transitions 0/861 dead transitions. [2024-06-04 15:44:55,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 861 transitions, 18365 flow [2024-06-04 15:44:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:44:55,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-04 15:44:55,451 INFO L175 Difference]: Start difference. First operand has 506 places, 830 transitions, 16168 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:44:55,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 861 transitions, 18365 flow [2024-06-04 15:45:05,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 861 transitions, 18292 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 15:45:05,795 INFO L231 Difference]: Finished difference. Result has 510 places, 834 transitions, 16358 flow [2024-06-04 15:45:05,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16099, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16358, PETRI_PLACES=510, PETRI_TRANSITIONS=834} [2024-06-04 15:45:05,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-04 15:45:05,796 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 834 transitions, 16358 flow [2024-06-04 15:45:05,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:05,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:05,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:05,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 15:45:05,796 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:05,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1272970280, now seen corresponding path program 3 times [2024-06-04 15:45:05,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:05,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053417806] [2024-06-04 15:45:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:05,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:06,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:06,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053417806] [2024-06-04 15:45:06,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053417806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:06,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:06,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:45:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135279633] [2024-06-04 15:45:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:45:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:45:06,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:45:06,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:45:06,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 834 transitions, 16358 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:06,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:06,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:45:06,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:10,780 INFO L124 PetriNetUnfolderBase]: 6273/9920 cut-off events. [2024-06-04 15:45:10,781 INFO L125 PetriNetUnfolderBase]: For 2647235/2647235 co-relation queries the response was YES. [2024-06-04 15:45:10,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129181 conditions, 9920 events. 6273/9920 cut-off events. For 2647235/2647235 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 65054 event pairs, 1488 based on Foata normal form. 10/9929 useless extension candidates. Maximal degree in co-relation 128950. Up to 9301 conditions per place. [2024-06-04 15:45:11,143 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 823 selfloop transitions, 38 changer transitions 0/866 dead transitions. [2024-06-04 15:45:11,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 866 transitions, 18816 flow [2024-06-04 15:45:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:45:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:45:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:45:11,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:45:11,144 INFO L175 Difference]: Start difference. First operand has 510 places, 834 transitions, 16358 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:45:11,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 866 transitions, 18816 flow [2024-06-04 15:45:24,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 866 transitions, 18696 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 15:45:24,512 INFO L231 Difference]: Finished difference. Result has 513 places, 841 transitions, 16571 flow [2024-06-04 15:45:24,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16238, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16571, PETRI_PLACES=513, PETRI_TRANSITIONS=841} [2024-06-04 15:45:24,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-04 15:45:24,513 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 841 transitions, 16571 flow [2024-06-04 15:45:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:24,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:24,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:24,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 15:45:24,513 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:24,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:24,514 INFO L85 PathProgramCache]: Analyzing trace with hash -19240248, now seen corresponding path program 4 times [2024-06-04 15:45:24,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:24,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732549606] [2024-06-04 15:45:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:24,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732549606] [2024-06-04 15:45:25,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732549606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:25,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:25,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912210471] [2024-06-04 15:45:25,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:25,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:25,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:25,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:45:25,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 841 transitions, 16571 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:25,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:25,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:45:25,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:29,436 INFO L124 PetriNetUnfolderBase]: 6332/10010 cut-off events. [2024-06-04 15:45:29,436 INFO L125 PetriNetUnfolderBase]: For 2757639/2757639 co-relation queries the response was YES. [2024-06-04 15:45:29,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130489 conditions, 10010 events. 6332/10010 cut-off events. For 2757639/2757639 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 65728 event pairs, 1520 based on Foata normal form. 20/10029 useless extension candidates. Maximal degree in co-relation 130255. Up to 9057 conditions per place. [2024-06-04 15:45:29,664 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 739 selfloop transitions, 133 changer transitions 0/877 dead transitions. [2024-06-04 15:45:29,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 877 transitions, 18782 flow [2024-06-04 15:45:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:45:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:45:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-04 15:45:29,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-04 15:45:29,666 INFO L175 Difference]: Start difference. First operand has 513 places, 841 transitions, 16571 flow. Second operand 9 states and 182 transitions. [2024-06-04 15:45:29,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 877 transitions, 18782 flow [2024-06-04 15:45:43,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 877 transitions, 18627 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-04 15:45:43,485 INFO L231 Difference]: Finished difference. Result has 519 places, 843 transitions, 16780 flow [2024-06-04 15:45:43,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16416, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16780, PETRI_PLACES=519, PETRI_TRANSITIONS=843} [2024-06-04 15:45:43,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-04 15:45:43,486 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 843 transitions, 16780 flow [2024-06-04 15:45:43,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:43,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:43,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:43,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 15:45:43,487 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:43,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash -19394070, now seen corresponding path program 6 times [2024-06-04 15:45:43,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:43,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179916157] [2024-06-04 15:45:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:43,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:44,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:44,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179916157] [2024-06-04 15:45:44,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179916157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:44,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:44,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:45:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632653484] [2024-06-04 15:45:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:44,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:45:44,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:45:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:45:44,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:45:44,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 843 transitions, 16780 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:44,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:44,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:45:44,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:48,978 INFO L124 PetriNetUnfolderBase]: 6809/10773 cut-off events. [2024-06-04 15:45:48,978 INFO L125 PetriNetUnfolderBase]: For 3455876/3455876 co-relation queries the response was YES. [2024-06-04 15:45:49,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144582 conditions, 10773 events. 6809/10773 cut-off events. For 3455876/3455876 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 71314 event pairs, 1570 based on Foata normal form. 48/10820 useless extension candidates. Maximal degree in co-relation 144346. Up to 8885 conditions per place. [2024-06-04 15:45:49,345 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 717 selfloop transitions, 173 changer transitions 5/900 dead transitions. [2024-06-04 15:45:49,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 900 transitions, 19840 flow [2024-06-04 15:45:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:45:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:45:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-04 15:45:49,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-04 15:45:49,346 INFO L175 Difference]: Start difference. First operand has 519 places, 843 transitions, 16780 flow. Second operand 10 states and 215 transitions. [2024-06-04 15:45:49,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 900 transitions, 19840 flow [2024-06-04 15:46:03,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 900 transitions, 19558 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:03,763 INFO L231 Difference]: Finished difference. Result has 524 places, 848 transitions, 17120 flow [2024-06-04 15:46:03,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16498, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17120, PETRI_PLACES=524, PETRI_TRANSITIONS=848} [2024-06-04 15:46:03,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-04 15:46:03,764 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 848 transitions, 17120 flow [2024-06-04 15:46:03,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:03,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:03,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:03,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 15:46:03,764 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:03,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash -711903914, now seen corresponding path program 5 times [2024-06-04 15:46:03,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:03,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282221785] [2024-06-04 15:46:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:04,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282221785] [2024-06-04 15:46:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282221785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:04,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:04,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:04,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893334216] [2024-06-04 15:46:04,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:04,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:04,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:04,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:46:04,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 848 transitions, 17120 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:04,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:04,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:46:04,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:09,576 INFO L124 PetriNetUnfolderBase]: 6930/10942 cut-off events. [2024-06-04 15:46:09,577 INFO L125 PetriNetUnfolderBase]: For 3470005/3470005 co-relation queries the response was YES. [2024-06-04 15:46:09,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151771 conditions, 10942 events. 6930/10942 cut-off events. For 3470005/3470005 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 72703 event pairs, 1744 based on Foata normal form. 16/10957 useless extension candidates. Maximal degree in co-relation 151533. Up to 9859 conditions per place. [2024-06-04 15:46:09,792 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 809 selfloop transitions, 81 changer transitions 0/895 dead transitions. [2024-06-04 15:46:09,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 895 transitions, 19848 flow [2024-06-04 15:46:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 15:46:09,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-04 15:46:09,794 INFO L175 Difference]: Start difference. First operand has 524 places, 848 transitions, 17120 flow. Second operand 8 states and 174 transitions. [2024-06-04 15:46:09,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 895 transitions, 19848 flow [2024-06-04 15:46:26,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 895 transitions, 19558 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:26,589 INFO L231 Difference]: Finished difference. Result has 527 places, 855 transitions, 17278 flow [2024-06-04 15:46:26,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16832, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17278, PETRI_PLACES=527, PETRI_TRANSITIONS=855} [2024-06-04 15:46:26,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 484 predicate places. [2024-06-04 15:46:26,591 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 855 transitions, 17278 flow [2024-06-04 15:46:26,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:26,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:26,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 15:46:26,591 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:26,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1282167050, now seen corresponding path program 6 times [2024-06-04 15:46:26,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097577003] [2024-06-04 15:46:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:26,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:27,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097577003] [2024-06-04 15:46:27,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097577003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:27,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:27,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076320851] [2024-06-04 15:46:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:27,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:46:27,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 855 transitions, 17278 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:27,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:27,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:46:27,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:32,116 INFO L124 PetriNetUnfolderBase]: 7118/11246 cut-off events. [2024-06-04 15:46:32,116 INFO L125 PetriNetUnfolderBase]: For 3689879/3689879 co-relation queries the response was YES. [2024-06-04 15:46:32,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159106 conditions, 11246 events. 7118/11246 cut-off events. For 3689879/3689879 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 75130 event pairs, 1786 based on Foata normal form. 12/11257 useless extension candidates. Maximal degree in co-relation 158865. Up to 9845 conditions per place. [2024-06-04 15:46:32,369 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 791 selfloop transitions, 104 changer transitions 0/900 dead transitions. [2024-06-04 15:46:32,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 900 transitions, 19990 flow [2024-06-04 15:46:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-04 15:46:32,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 15:46:32,370 INFO L175 Difference]: Start difference. First operand has 527 places, 855 transitions, 17278 flow. Second operand 8 states and 176 transitions. [2024-06-04 15:46:32,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 900 transitions, 19990 flow [2024-06-04 15:46:49,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 900 transitions, 19841 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-04 15:46:49,361 INFO L231 Difference]: Finished difference. Result has 532 places, 859 transitions, 17563 flow [2024-06-04 15:46:49,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17129, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17563, PETRI_PLACES=532, PETRI_TRANSITIONS=859} [2024-06-04 15:46:49,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 489 predicate places. [2024-06-04 15:46:49,361 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 859 transitions, 17563 flow [2024-06-04 15:46:49,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:49,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:49,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 15:46:49,362 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:49,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1282174490, now seen corresponding path program 7 times [2024-06-04 15:46:49,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:49,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410648151] [2024-06-04 15:46:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:49,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:50,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:50,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410648151] [2024-06-04 15:46:50,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410648151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:50,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:50,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:50,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401048597] [2024-06-04 15:46:50,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:50,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:50,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:50,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:46:50,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 859 transitions, 17563 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:50,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:50,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:46:50,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:55,159 INFO L124 PetriNetUnfolderBase]: 7169/11343 cut-off events. [2024-06-04 15:46:55,160 INFO L125 PetriNetUnfolderBase]: For 3770809/3770809 co-relation queries the response was YES. [2024-06-04 15:46:55,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160615 conditions, 11343 events. 7169/11343 cut-off events. For 3770809/3770809 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 75952 event pairs, 1916 based on Foata normal form. 18/11360 useless extension candidates. Maximal degree in co-relation 160371. Up to 10529 conditions per place. [2024-06-04 15:46:55,391 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 774 selfloop transitions, 113 changer transitions 0/892 dead transitions. [2024-06-04 15:46:55,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 892 transitions, 19750 flow [2024-06-04 15:46:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 15:46:55,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-04 15:46:55,393 INFO L175 Difference]: Start difference. First operand has 532 places, 859 transitions, 17563 flow. Second operand 8 states and 167 transitions. [2024-06-04 15:46:55,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 892 transitions, 19750 flow [2024-06-04 15:47:11,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 892 transitions, 19588 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 15:47:11,703 INFO L231 Difference]: Finished difference. Result has 536 places, 863 transitions, 17807 flow [2024-06-04 15:47:11,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17409, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17807, PETRI_PLACES=536, PETRI_TRANSITIONS=863} [2024-06-04 15:47:11,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-04 15:47:11,704 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 863 transitions, 17807 flow [2024-06-04 15:47:11,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:11,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:11,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:11,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 15:47:11,704 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:11,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:11,705 INFO L85 PathProgramCache]: Analyzing trace with hash -911420906, now seen corresponding path program 7 times [2024-06-04 15:47:11,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:11,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752229381] [2024-06-04 15:47:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:11,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:12,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752229381] [2024-06-04 15:47:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752229381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:12,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473316634] [2024-06-04 15:47:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:12,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:12,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:47:12,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 863 transitions, 17807 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:12,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:12,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:47:12,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:17,900 INFO L124 PetriNetUnfolderBase]: 7503/11879 cut-off events. [2024-06-04 15:47:17,900 INFO L125 PetriNetUnfolderBase]: For 4456295/4456295 co-relation queries the response was YES. [2024-06-04 15:47:18,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165921 conditions, 11879 events. 7503/11879 cut-off events. For 4456295/4456295 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 80170 event pairs, 1993 based on Foata normal form. 96/11974 useless extension candidates. Maximal degree in co-relation 165675. Up to 10412 conditions per place. [2024-06-04 15:47:18,145 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 761 selfloop transitions, 137 changer transitions 9/912 dead transitions. [2024-06-04 15:47:18,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 912 transitions, 20333 flow [2024-06-04 15:47:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-04 15:47:18,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-04 15:47:18,146 INFO L175 Difference]: Start difference. First operand has 536 places, 863 transitions, 17807 flow. Second operand 10 states and 201 transitions. [2024-06-04 15:47:18,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 912 transitions, 20333 flow Killed by 15