./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_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.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_pso.oepc_pso.opt_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-eb4cb34-m [2024-06-21 21:42:00,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:42:00,852 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:42:00,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:42:00,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:42:00,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:42:00,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:42:00,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:42:00,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:42:00,899 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:42:00,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:42:00,899 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:42:00,901 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:42:00,902 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:42:00,902 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:42:00,902 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:42:00,903 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:42:00,903 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:42:00,903 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:42:00,904 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:42:00,904 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:42:00,904 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:42:00,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:42:00,905 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:42:00,905 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:42:00,906 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:42:00,906 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:42:00,906 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:42:00,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:42:00,907 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:42:00,908 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:42:00,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:42:00,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:42:00,909 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:42:00,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:42:00,910 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:42:00,910 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:42:00,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:42:00,910 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:42:00,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:42:00,911 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:42:00,911 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:42:00,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:42:00,912 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:42:01,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:42:01,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:42:01,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:42:01,201 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:42:01,202 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:42:01,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 21:42:02,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:42:02,627 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:42:02,628 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 21:42:02,645 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed4bb1a7/828a3b3d721b431b97422b499bafb3bb/FLAG72de7ab39 [2024-06-21 21:42:02,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ed4bb1a7/828a3b3d721b431b97422b499bafb3bb [2024-06-21 21:42:02,659 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:42:02,660 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:42:02,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 21:42:02,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:42:02,817 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:42:02,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:42:02,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:42:02,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:42:02,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:42:02" (1/2) ... [2024-06-21 21:42:02,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcfbca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:42:02, skipping insertion in model container [2024-06-21 21:42:02,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:42:02" (1/2) ... [2024-06-21 21:42:02,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d509a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:42:02, skipping insertion in model container [2024-06-21 21:42:02,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:42:02" (2/2) ... [2024-06-21 21:42:02,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcfbca1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:02, skipping insertion in model container [2024-06-21 21:42:02,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:42:02" (2/2) ... [2024-06-21 21:42:02,827 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:42:02,918 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:42:02,920 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:42:02,920 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:42:02,920 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:42:02,920 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:42:02,921 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-21 21:42:02,963 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:42:03,348 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:42:03,360 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:42:03,479 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:42:03,523 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:42:03,524 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03 WrapperNode [2024-06-21 21:42:03,524 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:42:03,525 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:42:03,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:42:03,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:42:03,532 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 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,564 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 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,604 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-21 21:42:03,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:42:03,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:42:03,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:42:03,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:42:03,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,643 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,673 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:42:03,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,702 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,704 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:42:03,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:42:03,712 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:42:03,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:42:03,713 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (1/1) ... [2024-06-21 21:42:03,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:42:03,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:42:03,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:42:03,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:42:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:42:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:42:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:42:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:42:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:42:03,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:42:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:42:03,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:42:03,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:42:03,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:42:03,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:42:03,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:42:03,782 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:42:03,892 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:42:03,894 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:42:04,233 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:42:04,234 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:42:04,393 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:42:04,394 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:42:04,395 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:42:04 BoogieIcfgContainer [2024-06-21 21:42:04,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:42:04,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:42:04,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:42:04,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:42:04,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:42:02" (1/4) ... [2024-06-21 21:42:04,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f654e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:42:04, skipping insertion in model container [2024-06-21 21:42:04,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:42:02" (2/4) ... [2024-06-21 21:42:04,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f654e39 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:42:04, skipping insertion in model container [2024-06-21 21:42:04,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:42:03" (3/4) ... [2024-06-21 21:42:04,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f654e39 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:42:04, skipping insertion in model container [2024-06-21 21:42:04,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:42:04" (4/4) ... [2024-06-21 21:42:04,406 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 21:42:04,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:42:04,423 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:42:04,423 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:42:04,474 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:42:04,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:42:04,579 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 21:42:04,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:42:04,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:42:04,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:42:04,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 21:42:04,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:42:04,607 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;@6fb4859b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:42:04,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:42:04,614 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:42:04,614 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:42:04,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:42:04,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:04,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:42:04,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:04,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 362810851, now seen corresponding path program 1 times [2024-06-21 21:42:04,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:04,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995456201] [2024-06-21 21:42:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:04,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:05,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:05,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995456201] [2024-06-21 21:42:05,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995456201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:05,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:05,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:42:05,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013370413] [2024-06-21 21:42:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:05,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:42:05,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:42:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:42:05,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 21:42:05,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:05,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:05,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 21:42:05,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:06,128 INFO L124 PetriNetUnfolderBase]: 891/1368 cut-off events. [2024-06-21 21:42:06,129 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-21 21:42:06,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 1368 events. 891/1368 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6471 event pairs, 520 based on Foata normal form. 2/1340 useless extension candidates. Maximal degree in co-relation 2777. Up to 1335 conditions per place. [2024-06-21 21:42:06,144 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 21:42:06,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 169 flow [2024-06-21 21:42:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:42:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:42:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-21 21:42:06,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 21:42:06,156 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 77 transitions. [2024-06-21 21:42:06,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 169 flow [2024-06-21 21:42:06,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:06,161 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 21:42:06,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 21:42:06,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 21:42:06,166 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 21:42:06,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:06,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:06,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:06,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:42:06,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:06,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 746924961, now seen corresponding path program 1 times [2024-06-21 21:42:06,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:06,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479818681] [2024-06-21 21:42:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:07,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:07,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479818681] [2024-06-21 21:42:07,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479818681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:07,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:07,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:42:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342654816] [2024-06-21 21:42:07,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:07,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:42:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:42:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:42:07,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 21:42:07,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:07,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:07,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 21:42:07,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:08,202 INFO L124 PetriNetUnfolderBase]: 1131/1721 cut-off events. [2024-06-21 21:42:08,202 INFO L125 PetriNetUnfolderBase]: For 341/355 co-relation queries the response was YES. [2024-06-21 21:42:08,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 1721 events. 1131/1721 cut-off events. For 341/355 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7893 event pairs, 589 based on Foata normal form. 13/1728 useless extension candidates. Maximal degree in co-relation 3977. Up to 1639 conditions per place. [2024-06-21 21:42:08,214 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 37 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-21 21:42:08,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 222 flow [2024-06-21 21:42:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:42:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:42:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 21:42:08,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 21:42:08,219 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 94 transitions. [2024-06-21 21:42:08,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 222 flow [2024-06-21 21:42:08,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:42:08,223 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-21 21:42:08,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-21 21:42:08,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-21 21:42:08,224 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-21 21:42:08,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:08,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:08,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:08,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:42:08,227 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)] === [2024-06-21 21:42:08,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash 934192984, now seen corresponding path program 1 times [2024-06-21 21:42:08,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:08,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581372193] [2024-06-21 21:42:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:08,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:09,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581372193] [2024-06-21 21:42:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581372193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:09,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:09,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:42:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516596107] [2024-06-21 21:42:09,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:42:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:42:09,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:42:09,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:42:09,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 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) [2024-06-21 21:42:09,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:09,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:42:09,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:09,470 INFO L124 PetriNetUnfolderBase]: 888/1371 cut-off events. [2024-06-21 21:42:09,470 INFO L125 PetriNetUnfolderBase]: For 720/723 co-relation queries the response was YES. [2024-06-21 21:42:09,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1371 events. 888/1371 cut-off events. For 720/723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6384 event pairs, 408 based on Foata normal form. 6/1374 useless extension candidates. Maximal degree in co-relation 3460. Up to 1326 conditions per place. [2024-06-21 21:42:09,478 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 39 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-21 21:42:09,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 271 flow [2024-06-21 21:42:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:42:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:42:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 21:42:09,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-21 21:42:09,480 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 5 states and 99 transitions. [2024-06-21 21:42:09,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 271 flow [2024-06-21 21:42:09,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 254 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:42:09,483 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 170 flow [2024-06-21 21:42:09,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-06-21 21:42:09,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-06-21 21:42:09,484 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 170 flow [2024-06-21 21:42:09,484 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) [2024-06-21 21:42:09,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:09,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:09,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:42:09,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:09,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1104787214, now seen corresponding path program 1 times [2024-06-21 21:42:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:09,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934667729] [2024-06-21 21:42:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:09,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:10,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:10,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934667729] [2024-06-21 21:42:10,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934667729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:10,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:10,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:42:10,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481240789] [2024-06-21 21:42:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:10,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:42:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:42:10,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:42:10,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:10,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:10,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:10,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:10,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:10,688 INFO L124 PetriNetUnfolderBase]: 1047/1601 cut-off events. [2024-06-21 21:42:10,689 INFO L125 PetriNetUnfolderBase]: For 1527/1527 co-relation queries the response was YES. [2024-06-21 21:42:10,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 1601 events. 1047/1601 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7559 event pairs, 479 based on Foata normal form. 4/1603 useless extension candidates. Maximal degree in co-relation 4576. Up to 1534 conditions per place. [2024-06-21 21:42:10,731 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-21 21:42:10,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 379 flow [2024-06-21 21:42:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:42:10,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-21 21:42:10,733 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 170 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:42:10,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 379 flow [2024-06-21 21:42:10,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:42:10,737 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 242 flow [2024-06-21 21:42:10,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-21 21:42:10,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-21 21:42:10,738 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 242 flow [2024-06-21 21:42:10,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:10,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:10,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:10,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:42:10,738 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)] === [2024-06-21 21:42:10,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1136444429, now seen corresponding path program 1 times [2024-06-21 21:42:10,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:10,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523430650] [2024-06-21 21:42:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:11,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:11,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523430650] [2024-06-21 21:42:11,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523430650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:11,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:11,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:11,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898694623] [2024-06-21 21:42:11,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:11,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:11,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:11,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:11,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 242 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:11,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:11,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:11,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:12,229 INFO L124 PetriNetUnfolderBase]: 1042/1599 cut-off events. [2024-06-21 21:42:12,229 INFO L125 PetriNetUnfolderBase]: For 2526/2526 co-relation queries the response was YES. [2024-06-21 21:42:12,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5056 conditions, 1599 events. 1042/1599 cut-off events. For 2526/2526 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7654 event pairs, 461 based on Foata normal form. 2/1599 useless extension candidates. Maximal degree in co-relation 5034. Up to 1541 conditions per place. [2024-06-21 21:42:12,240 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 59 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-21 21:42:12,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 477 flow [2024-06-21 21:42:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:42:12,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:42:12,244 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 242 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:42:12,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 477 flow [2024-06-21 21:42:12,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 471 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 21:42:12,254 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 335 flow [2024-06-21 21:42:12,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-21 21:42:12,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-21 21:42:12,255 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 335 flow [2024-06-21 21:42:12,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:12,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:12,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:12,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:42:12,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:12,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1021043945, now seen corresponding path program 1 times [2024-06-21 21:42:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356741288] [2024-06-21 21:42:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:12,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356741288] [2024-06-21 21:42:13,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356741288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:13,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323601380] [2024-06-21 21:42:13,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:13,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:13,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:13,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 335 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:13,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:13,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:13,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:13,912 INFO L124 PetriNetUnfolderBase]: 1242/1907 cut-off events. [2024-06-21 21:42:13,912 INFO L125 PetriNetUnfolderBase]: For 4429/4455 co-relation queries the response was YES. [2024-06-21 21:42:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6477 conditions, 1907 events. 1242/1907 cut-off events. For 4429/4455 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9139 event pairs, 448 based on Foata normal form. 13/1883 useless extension candidates. Maximal degree in co-relation 6450. Up to 1748 conditions per place. [2024-06-21 21:42:13,926 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 48 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-06-21 21:42:13,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 523 flow [2024-06-21 21:42:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:42:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:42:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-21 21:42:13,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-21 21:42:13,927 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 335 flow. Second operand 5 states and 98 transitions. [2024-06-21 21:42:13,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 523 flow [2024-06-21 21:42:13,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 509 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:42:13,934 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 397 flow [2024-06-21 21:42:13,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-21 21:42:13,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 21:42:13,935 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 397 flow [2024-06-21 21:42:13,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:13,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:13,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:13,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:42:13,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:13,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash 870040347, now seen corresponding path program 1 times [2024-06-21 21:42:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108165262] [2024-06-21 21:42:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:15,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108165262] [2024-06-21 21:42:15,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108165262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:15,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:15,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:15,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399080155] [2024-06-21 21:42:15,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:15,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:15,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:15,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:15,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:15,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 397 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:15,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:15,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:15,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:15,774 INFO L124 PetriNetUnfolderBase]: 1112/1712 cut-off events. [2024-06-21 21:42:15,774 INFO L125 PetriNetUnfolderBase]: For 5323/5323 co-relation queries the response was YES. [2024-06-21 21:42:15,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6328 conditions, 1712 events. 1112/1712 cut-off events. For 5323/5323 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8371 event pairs, 435 based on Foata normal form. 26/1737 useless extension candidates. Maximal degree in co-relation 6299. Up to 1489 conditions per place. [2024-06-21 21:42:15,788 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 66 selfloop transitions, 25 changer transitions 0/96 dead transitions. [2024-06-21 21:42:15,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 699 flow [2024-06-21 21:42:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:42:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:42:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:42:15,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:42:15,790 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 397 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:42:15,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 699 flow [2024-06-21 21:42:15,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 655 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:15,797 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 482 flow [2024-06-21 21:42:15,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-21 21:42:15,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 21:42:15,798 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 482 flow [2024-06-21 21:42:15,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:15,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:42:15,799 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:15,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1587589869, now seen corresponding path program 1 times [2024-06-21 21:42:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866065108] [2024-06-21 21:42:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:16,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866065108] [2024-06-21 21:42:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866065108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:16,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430375755] [2024-06-21 21:42:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:17,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:17,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 482 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:17,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:17,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:17,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:17,506 INFO L124 PetriNetUnfolderBase]: 1372/2095 cut-off events. [2024-06-21 21:42:17,506 INFO L125 PetriNetUnfolderBase]: For 7195/7195 co-relation queries the response was YES. [2024-06-21 21:42:17,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7936 conditions, 2095 events. 1372/2095 cut-off events. For 7195/7195 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9848 event pairs, 476 based on Foata normal form. 2/2096 useless extension candidates. Maximal degree in co-relation 7904. Up to 1948 conditions per place. [2024-06-21 21:42:17,532 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-21 21:42:17,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 776 flow [2024-06-21 21:42:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 21:42:17,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 21:42:17,535 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 482 flow. Second operand 6 states and 112 transitions. [2024-06-21 21:42:17,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 776 flow [2024-06-21 21:42:17,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 722 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:17,551 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 583 flow [2024-06-21 21:42:17,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=583, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-21 21:42:17,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-21 21:42:17,552 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 583 flow [2024-06-21 21:42:17,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:17,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:17,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:17,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:42:17,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:17,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash -786509795, now seen corresponding path program 1 times [2024-06-21 21:42:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:17,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445233158] [2024-06-21 21:42:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:18,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:18,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445233158] [2024-06-21 21:42:18,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445233158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:18,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:18,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:18,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136820584] [2024-06-21 21:42:18,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:18,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:18,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:18,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:18,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:18,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:18,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:18,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:18,972 INFO L124 PetriNetUnfolderBase]: 1366/2087 cut-off events. [2024-06-21 21:42:18,972 INFO L125 PetriNetUnfolderBase]: For 8657/8657 co-relation queries the response was YES. [2024-06-21 21:42:18,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 2087 events. 1366/2087 cut-off events. For 8657/8657 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9834 event pairs, 462 based on Foata normal form. 2/2088 useless extension candidates. Maximal degree in co-relation 8323. Up to 2048 conditions per place. [2024-06-21 21:42:18,986 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 82 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2024-06-21 21:42:18,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 849 flow [2024-06-21 21:42:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:42:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:42:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 21:42:18,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-21 21:42:18,988 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 583 flow. Second operand 5 states and 88 transitions. [2024-06-21 21:42:18,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 849 flow [2024-06-21 21:42:18,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 827 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 21:42:19,001 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 652 flow [2024-06-21 21:42:19,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=652, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-21 21:42:19,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 21:42:19,002 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 652 flow [2024-06-21 21:42:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:19,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:19,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:19,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:42:19,003 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)] === [2024-06-21 21:42:19,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1505224282, now seen corresponding path program 1 times [2024-06-21 21:42:19,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:19,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862375885] [2024-06-21 21:42:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:19,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:20,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862375885] [2024-06-21 21:42:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862375885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:20,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:20,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:20,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820346757] [2024-06-21 21:42:20,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:20,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:20,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:20,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:20,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 652 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:20,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:20,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:20,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:20,706 INFO L124 PetriNetUnfolderBase]: 1315/2039 cut-off events. [2024-06-21 21:42:20,706 INFO L125 PetriNetUnfolderBase]: For 8957/8965 co-relation queries the response was YES. [2024-06-21 21:42:20,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8251 conditions, 2039 events. 1315/2039 cut-off events. For 8957/8965 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9938 event pairs, 299 based on Foata normal form. 10/2010 useless extension candidates. Maximal degree in co-relation 8212. Up to 1854 conditions per place. [2024-06-21 21:42:20,724 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-21 21:42:20,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 884 flow [2024-06-21 21:42:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:42:20,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-21 21:42:20,726 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 652 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:42:20,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 884 flow [2024-06-21 21:42:20,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 104 transitions, 878 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 21:42:20,739 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 703 flow [2024-06-21 21:42:20,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=703, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-21 21:42:20,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-21 21:42:20,743 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 703 flow [2024-06-21 21:42:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:20,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:20,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:42:20,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:20,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1687101112, now seen corresponding path program 2 times [2024-06-21 21:42:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761386294] [2024-06-21 21:42:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:21,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:21,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761386294] [2024-06-21 21:42:21,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761386294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:21,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:21,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:21,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080726119] [2024-06-21 21:42:21,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:21,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:22,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:22,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 703 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:22,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:22,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:22,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:22,705 INFO L124 PetriNetUnfolderBase]: 1393/2166 cut-off events. [2024-06-21 21:42:22,705 INFO L125 PetriNetUnfolderBase]: For 11829/11852 co-relation queries the response was YES. [2024-06-21 21:42:22,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 2166 events. 1393/2166 cut-off events. For 11829/11852 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10669 event pairs, 392 based on Foata normal form. 13/2138 useless extension candidates. Maximal degree in co-relation 9246. Up to 1966 conditions per place. [2024-06-21 21:42:22,723 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 87 selfloop transitions, 39 changer transitions 0/142 dead transitions. [2024-06-21 21:42:22,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 1277 flow [2024-06-21 21:42:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:42:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:42:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:42:22,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-21 21:42:22,725 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 703 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:42:22,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 1277 flow [2024-06-21 21:42:22,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 142 transitions, 1212 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:22,740 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 1022 flow [2024-06-21 21:42:22,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1022, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-21 21:42:22,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-21 21:42:22,741 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 1022 flow [2024-06-21 21:42:22,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:22,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:22,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:42:22,742 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:22,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:22,742 INFO L85 PathProgramCache]: Analyzing trace with hash 760639894, now seen corresponding path program 3 times [2024-06-21 21:42:22,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:22,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636980499] [2024-06-21 21:42:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:22,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:23,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636980499] [2024-06-21 21:42:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636980499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:23,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:23,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970559052] [2024-06-21 21:42:23,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:24,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:24,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 1022 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:24,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:24,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:24,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:24,602 INFO L124 PetriNetUnfolderBase]: 1385/2155 cut-off events. [2024-06-21 21:42:24,602 INFO L125 PetriNetUnfolderBase]: For 13994/14009 co-relation queries the response was YES. [2024-06-21 21:42:24,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9718 conditions, 2155 events. 1385/2155 cut-off events. For 13994/14009 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10607 event pairs, 401 based on Foata normal form. 8/2114 useless extension candidates. Maximal degree in co-relation 9672. Up to 1864 conditions per place. [2024-06-21 21:42:24,624 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 46 changer transitions 0/131 dead transitions. [2024-06-21 21:42:24,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1328 flow [2024-06-21 21:42:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 21:42:24,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 21:42:24,628 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 1022 flow. Second operand 6 states and 115 transitions. [2024-06-21 21:42:24,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1328 flow [2024-06-21 21:42:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1223 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:24,648 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1047 flow [2024-06-21 21:42:24,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1047, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2024-06-21 21:42:24,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 21:42:24,650 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1047 flow [2024-06-21 21:42:24,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:24,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:24,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:42:24,652 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)] === [2024-06-21 21:42:24,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash 772518230, now seen corresponding path program 1 times [2024-06-21 21:42:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:24,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052394237] [2024-06-21 21:42:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:24,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052394237] [2024-06-21 21:42:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052394237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:26,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:26,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:26,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12319394] [2024-06-21 21:42:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:26,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:26,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:26,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:26,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:26,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1047 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:26,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:26,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:26,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:26,703 INFO L124 PetriNetUnfolderBase]: 1481/2275 cut-off events. [2024-06-21 21:42:26,703 INFO L125 PetriNetUnfolderBase]: For 14275/14275 co-relation queries the response was YES. [2024-06-21 21:42:26,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10397 conditions, 2275 events. 1481/2275 cut-off events. For 14275/14275 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10942 event pairs, 424 based on Foata normal form. 2/2276 useless extension candidates. Maximal degree in co-relation 10352. Up to 2027 conditions per place. [2024-06-21 21:42:26,721 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 95 selfloop transitions, 40 changer transitions 0/139 dead transitions. [2024-06-21 21:42:26,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 139 transitions, 1413 flow [2024-06-21 21:42:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 21:42:26,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:42:26,724 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1047 flow. Second operand 7 states and 130 transitions. [2024-06-21 21:42:26,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 139 transitions, 1413 flow [2024-06-21 21:42:26,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 139 transitions, 1311 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:26,749 INFO L231 Difference]: Finished difference. Result has 97 places, 117 transitions, 1071 flow [2024-06-21 21:42:26,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=97, PETRI_TRANSITIONS=117} [2024-06-21 21:42:26,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-21 21:42:26,750 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 117 transitions, 1071 flow [2024-06-21 21:42:26,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:26,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:26,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:26,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:42:26,751 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:26,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2006512804, now seen corresponding path program 2 times [2024-06-21 21:42:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:26,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691791350] [2024-06-21 21:42:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:26,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:28,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691791350] [2024-06-21 21:42:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691791350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:28,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:28,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796097157] [2024-06-21 21:42:28,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:28,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:28,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 117 transitions, 1071 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:28,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:28,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:28,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:28,814 INFO L124 PetriNetUnfolderBase]: 1487/2286 cut-off events. [2024-06-21 21:42:28,814 INFO L125 PetriNetUnfolderBase]: For 14343/14347 co-relation queries the response was YES. [2024-06-21 21:42:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10628 conditions, 2286 events. 1487/2286 cut-off events. For 14343/14347 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11051 event pairs, 416 based on Foata normal form. 6/2291 useless extension candidates. Maximal degree in co-relation 10582. Up to 2095 conditions per place. [2024-06-21 21:42:28,831 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2024-06-21 21:42:28,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 154 transitions, 1540 flow [2024-06-21 21:42:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:42:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:42:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:42:28,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 21:42:28,833 INFO L175 Difference]: Start difference. First operand has 97 places, 117 transitions, 1071 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:42:28,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 154 transitions, 1540 flow [2024-06-21 21:42:28,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 154 transitions, 1447 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:28,857 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 1123 flow [2024-06-21 21:42:28,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1123, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2024-06-21 21:42:28,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 21:42:28,858 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 1123 flow [2024-06-21 21:42:28,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:28,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:28,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:28,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:42:28,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:28,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1662404534, now seen corresponding path program 1 times [2024-06-21 21:42:28,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:28,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329506901] [2024-06-21 21:42:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:28,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:29,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:29,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329506901] [2024-06-21 21:42:29,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329506901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:29,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:29,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539765068] [2024-06-21 21:42:29,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:29,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:29,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:29,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:30,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:30,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:30,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:30,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:30,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:30,716 INFO L124 PetriNetUnfolderBase]: 1504/2311 cut-off events. [2024-06-21 21:42:30,716 INFO L125 PetriNetUnfolderBase]: For 14547/14547 co-relation queries the response was YES. [2024-06-21 21:42:30,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10715 conditions, 2311 events. 1504/2311 cut-off events. For 14547/14547 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11095 event pairs, 261 based on Foata normal form. 4/2314 useless extension candidates. Maximal degree in co-relation 10668. Up to 2127 conditions per place. [2024-06-21 21:42:30,733 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 128 selfloop transitions, 19 changer transitions 0/151 dead transitions. [2024-06-21 21:42:30,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1533 flow [2024-06-21 21:42:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:42:30,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:42:30,735 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 1123 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:42:30,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1533 flow [2024-06-21 21:42:30,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1451 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:30,759 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1152 flow [2024-06-21 21:42:30,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1152, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2024-06-21 21:42:30,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 21:42:30,760 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1152 flow [2024-06-21 21:42:30,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:30,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:30,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:30,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:42:30,761 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:30,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1206151954, now seen corresponding path program 2 times [2024-06-21 21:42:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:30,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757456169] [2024-06-21 21:42:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:30,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:31,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:31,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757456169] [2024-06-21 21:42:31,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757456169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:31,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:31,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:31,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883133763] [2024-06-21 21:42:31,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:31,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:31,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:31,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:32,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:32,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1152 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:32,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:32,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:32,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:32,602 INFO L124 PetriNetUnfolderBase]: 1521/2338 cut-off events. [2024-06-21 21:42:32,602 INFO L125 PetriNetUnfolderBase]: For 16690/16690 co-relation queries the response was YES. [2024-06-21 21:42:32,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11089 conditions, 2338 events. 1521/2338 cut-off events. For 16690/16690 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11297 event pairs, 385 based on Foata normal form. 4/2341 useless extension candidates. Maximal degree in co-relation 11039. Up to 2086 conditions per place. [2024-06-21 21:42:32,617 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 113 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-21 21:42:32,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1549 flow [2024-06-21 21:42:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:42:32,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:42:32,619 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1152 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:42:32,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1549 flow [2024-06-21 21:42:32,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 154 transitions, 1503 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 21:42:32,648 INFO L231 Difference]: Finished difference. Result has 109 places, 132 transitions, 1223 flow [2024-06-21 21:42:32,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1223, PETRI_PLACES=109, PETRI_TRANSITIONS=132} [2024-06-21 21:42:32,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-21 21:42:32,649 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 132 transitions, 1223 flow [2024-06-21 21:42:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:32,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:32,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:32,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:42:32,650 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)] === [2024-06-21 21:42:32,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1119312274, now seen corresponding path program 3 times [2024-06-21 21:42:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:32,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908928719] [2024-06-21 21:42:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:33,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:33,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908928719] [2024-06-21 21:42:33,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908928719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:33,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:33,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816604819] [2024-06-21 21:42:33,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:33,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:33,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:33,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:33,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:33,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 132 transitions, 1223 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:33,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:33,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:34,319 INFO L124 PetriNetUnfolderBase]: 1513/2326 cut-off events. [2024-06-21 21:42:34,319 INFO L125 PetriNetUnfolderBase]: For 18687/18687 co-relation queries the response was YES. [2024-06-21 21:42:34,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11448 conditions, 2326 events. 1513/2326 cut-off events. For 18687/18687 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11227 event pairs, 374 based on Foata normal form. 4/2329 useless extension candidates. Maximal degree in co-relation 11396. Up to 2000 conditions per place. [2024-06-21 21:42:34,331 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-21 21:42:34,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 159 transitions, 1653 flow [2024-06-21 21:42:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:42:34,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:42:34,333 INFO L175 Difference]: Start difference. First operand has 109 places, 132 transitions, 1223 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:42:34,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 159 transitions, 1653 flow [2024-06-21 21:42:34,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 159 transitions, 1569 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:34,363 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1295 flow [2024-06-21 21:42:34,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1295, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-06-21 21:42:34,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 21:42:34,364 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1295 flow [2024-06-21 21:42:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:34,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:34,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:42:34,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:34,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1928263856, now seen corresponding path program 1 times [2024-06-21 21:42:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:34,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884794359] [2024-06-21 21:42:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:34,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:35,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:35,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884794359] [2024-06-21 21:42:35,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884794359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:35,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:35,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:35,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870621271] [2024-06-21 21:42:35,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:35,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:35,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:36,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:36,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1295 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:36,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:36,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:36,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:36,622 INFO L124 PetriNetUnfolderBase]: 1571/2434 cut-off events. [2024-06-21 21:42:36,622 INFO L125 PetriNetUnfolderBase]: For 22927/22927 co-relation queries the response was YES. [2024-06-21 21:42:36,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12187 conditions, 2434 events. 1571/2434 cut-off events. For 22927/22927 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12015 event pairs, 344 based on Foata normal form. 16/2449 useless extension candidates. Maximal degree in co-relation 12133. Up to 2070 conditions per place. [2024-06-21 21:42:36,636 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 130 selfloop transitions, 36 changer transitions 0/170 dead transitions. [2024-06-21 21:42:36,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 170 transitions, 1766 flow [2024-06-21 21:42:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:42:36,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 21:42:36,639 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1295 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:42:36,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 170 transitions, 1766 flow [2024-06-21 21:42:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 170 transitions, 1672 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:36,678 INFO L231 Difference]: Finished difference. Result has 116 places, 139 transitions, 1314 flow [2024-06-21 21:42:36,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=116, PETRI_TRANSITIONS=139} [2024-06-21 21:42:36,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 21:42:36,679 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 139 transitions, 1314 flow [2024-06-21 21:42:36,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:36,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:36,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:36,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:42:36,680 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:36,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash 490788510, now seen corresponding path program 2 times [2024-06-21 21:42:36,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:36,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255550769] [2024-06-21 21:42:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:36,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:38,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:38,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255550769] [2024-06-21 21:42:38,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255550769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:38,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:38,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:38,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715764125] [2024-06-21 21:42:38,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:38,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:38,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:38,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:38,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 139 transitions, 1314 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:38,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:38,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:38,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:38,784 INFO L124 PetriNetUnfolderBase]: 1673/2610 cut-off events. [2024-06-21 21:42:38,784 INFO L125 PetriNetUnfolderBase]: For 25916/25920 co-relation queries the response was YES. [2024-06-21 21:42:38,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13234 conditions, 2610 events. 1673/2610 cut-off events. For 25916/25920 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13151 event pairs, 377 based on Foata normal form. 16/2625 useless extension candidates. Maximal degree in co-relation 13179. Up to 2041 conditions per place. [2024-06-21 21:42:38,803 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 143 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2024-06-21 21:42:38,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 183 transitions, 1923 flow [2024-06-21 21:42:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:42:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:42:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:42:38,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-21 21:42:38,805 INFO L175 Difference]: Start difference. First operand has 116 places, 139 transitions, 1314 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:42:38,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 183 transitions, 1923 flow [2024-06-21 21:42:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 183 transitions, 1836 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:38,838 INFO L231 Difference]: Finished difference. Result has 119 places, 141 transitions, 1343 flow [2024-06-21 21:42:38,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1343, PETRI_PLACES=119, PETRI_TRANSITIONS=141} [2024-06-21 21:42:38,838 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-21 21:42:38,839 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 141 transitions, 1343 flow [2024-06-21 21:42:38,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:38,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:38,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:38,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:42:38,839 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:38,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:38,840 INFO L85 PathProgramCache]: Analyzing trace with hash 490781070, now seen corresponding path program 3 times [2024-06-21 21:42:38,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:38,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230169213] [2024-06-21 21:42:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:38,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:40,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:40,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230169213] [2024-06-21 21:42:40,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230169213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:40,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:40,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850495632] [2024-06-21 21:42:40,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:40,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:40,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:40,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:40,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 141 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:40,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:40,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:40,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:41,143 INFO L124 PetriNetUnfolderBase]: 1662/2593 cut-off events. [2024-06-21 21:42:41,143 INFO L125 PetriNetUnfolderBase]: For 27385/27389 co-relation queries the response was YES. [2024-06-21 21:42:41,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13064 conditions, 2593 events. 1662/2593 cut-off events. For 27385/27389 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13034 event pairs, 406 based on Foata normal form. 20/2612 useless extension candidates. Maximal degree in co-relation 13008. Up to 2282 conditions per place. [2024-06-21 21:42:41,160 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 143 selfloop transitions, 35 changer transitions 0/182 dead transitions. [2024-06-21 21:42:41,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 182 transitions, 1856 flow [2024-06-21 21:42:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 21:42:41,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:42:41,163 INFO L175 Difference]: Start difference. First operand has 119 places, 141 transitions, 1343 flow. Second operand 10 states and 180 transitions. [2024-06-21 21:42:41,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 182 transitions, 1856 flow [2024-06-21 21:42:41,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 1803 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:41,212 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1393 flow [2024-06-21 21:42:41,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1393, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-21 21:42:41,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 21:42:41,213 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1393 flow [2024-06-21 21:42:41,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:41,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:41,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:41,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:42:41,214 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:41,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:41,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1593032044, now seen corresponding path program 1 times [2024-06-21 21:42:41,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:41,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968355741] [2024-06-21 21:42:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:41,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:42,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:42,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968355741] [2024-06-21 21:42:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968355741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:42,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:42,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:42,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396481318] [2024-06-21 21:42:42,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:42,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:42,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:42,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:42,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1393 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:42,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:42,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:42,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:42,540 INFO L124 PetriNetUnfolderBase]: 1682/2623 cut-off events. [2024-06-21 21:42:42,541 INFO L125 PetriNetUnfolderBase]: For 28383/28383 co-relation queries the response was YES. [2024-06-21 21:42:42,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13427 conditions, 2623 events. 1682/2623 cut-off events. For 28383/28383 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13208 event pairs, 420 based on Foata normal form. 4/2626 useless extension candidates. Maximal degree in co-relation 13369. Up to 2461 conditions per place. [2024-06-21 21:42:42,558 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-21 21:42:42,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 155 transitions, 1749 flow [2024-06-21 21:42:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:42:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:42:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 21:42:42,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-21 21:42:42,559 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1393 flow. Second operand 5 states and 92 transitions. [2024-06-21 21:42:42,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 155 transitions, 1749 flow [2024-06-21 21:42:42,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 155 transitions, 1670 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 21:42:42,598 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 1422 flow [2024-06-21 21:42:42,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1422, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2024-06-21 21:42:42,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 21:42:42,598 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 1422 flow [2024-06-21 21:42:42,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:42,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:42,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:42:42,599 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:42,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash -366709414, now seen corresponding path program 2 times [2024-06-21 21:42:42,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:42,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448032089] [2024-06-21 21:42:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:42,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448032089] [2024-06-21 21:42:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448032089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:43,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:43,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:43,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776480846] [2024-06-21 21:42:43,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:43,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:43,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:43,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:43,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 1422 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:43,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:43,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:43,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:43,954 INFO L124 PetriNetUnfolderBase]: 1670/2607 cut-off events. [2024-06-21 21:42:43,954 INFO L125 PetriNetUnfolderBase]: For 30175/30175 co-relation queries the response was YES. [2024-06-21 21:42:43,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2607 events. 1670/2607 cut-off events. For 30175/30175 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13105 event pairs, 418 based on Foata normal form. 4/2610 useless extension candidates. Maximal degree in co-relation 13550. Up to 2429 conditions per place. [2024-06-21 21:42:43,970 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 122 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-21 21:42:43,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 161 transitions, 1808 flow [2024-06-21 21:42:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 21:42:43,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-21 21:42:43,972 INFO L175 Difference]: Start difference. First operand has 120 places, 146 transitions, 1422 flow. Second operand 6 states and 107 transitions. [2024-06-21 21:42:43,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 161 transitions, 1808 flow [2024-06-21 21:42:44,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 161 transitions, 1732 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:44,047 INFO L231 Difference]: Finished difference. Result has 123 places, 149 transitions, 1458 flow [2024-06-21 21:42:44,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1458, PETRI_PLACES=123, PETRI_TRANSITIONS=149} [2024-06-21 21:42:44,047 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-21 21:42:44,048 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 149 transitions, 1458 flow [2024-06-21 21:42:44,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:44,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:44,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:42:44,048 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:44,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1163111206, now seen corresponding path program 1 times [2024-06-21 21:42:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:44,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206226571] [2024-06-21 21:42:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:44,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:44,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206226571] [2024-06-21 21:42:44,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206226571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:44,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:44,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:44,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167798629] [2024-06-21 21:42:44,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:44,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:44,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:44,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 149 transitions, 1458 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:44,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:44,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:44,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:45,219 INFO L124 PetriNetUnfolderBase]: 1581/2516 cut-off events. [2024-06-21 21:42:45,219 INFO L125 PetriNetUnfolderBase]: For 30890/30895 co-relation queries the response was YES. [2024-06-21 21:42:45,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13534 conditions, 2516 events. 1581/2516 cut-off events. For 30890/30895 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12827 event pairs, 399 based on Foata normal form. 5/2513 useless extension candidates. Maximal degree in co-relation 13474. Up to 2321 conditions per place. [2024-06-21 21:42:45,237 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-21 21:42:45,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 1982 flow [2024-06-21 21:42:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:42:45,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 21:42:45,238 INFO L175 Difference]: Start difference. First operand has 123 places, 149 transitions, 1458 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:42:45,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 1982 flow [2024-06-21 21:42:45,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 175 transitions, 1896 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:45,271 INFO L231 Difference]: Finished difference. Result has 126 places, 155 transitions, 1534 flow [2024-06-21 21:42:45,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1534, PETRI_PLACES=126, PETRI_TRANSITIONS=155} [2024-06-21 21:42:45,272 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 21:42:45,272 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 155 transitions, 1534 flow [2024-06-21 21:42:45,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:45,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:45,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:45,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:42:45,272 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:45,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:45,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1163231362, now seen corresponding path program 1 times [2024-06-21 21:42:45,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:45,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985614663] [2024-06-21 21:42:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:45,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:45,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985614663] [2024-06-21 21:42:45,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985614663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:45,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:45,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444507779] [2024-06-21 21:42:45,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:45,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:45,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:45,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 155 transitions, 1534 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:45,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:45,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:45,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:46,420 INFO L124 PetriNetUnfolderBase]: 1716/2670 cut-off events. [2024-06-21 21:42:46,421 INFO L125 PetriNetUnfolderBase]: For 34478/34478 co-relation queries the response was YES. [2024-06-21 21:42:46,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14445 conditions, 2670 events. 1716/2670 cut-off events. For 34478/34478 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13429 event pairs, 416 based on Foata normal form. 2/2671 useless extension candidates. Maximal degree in co-relation 14384. Up to 2574 conditions per place. [2024-06-21 21:42:46,438 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 20 changer transitions 0/187 dead transitions. [2024-06-21 21:42:46,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 2115 flow [2024-06-21 21:42:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:42:46,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:42:46,440 INFO L175 Difference]: Start difference. First operand has 126 places, 155 transitions, 1534 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:42:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 2115 flow [2024-06-21 21:42:46,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 2049 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:46,484 INFO L231 Difference]: Finished difference. Result has 133 places, 170 transitions, 1673 flow [2024-06-21 21:42:46,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=133, PETRI_TRANSITIONS=170} [2024-06-21 21:42:46,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 21:42:46,485 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 170 transitions, 1673 flow [2024-06-21 21:42:46,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:46,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:46,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:46,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:42:46,485 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:46,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash -98998300, now seen corresponding path program 2 times [2024-06-21 21:42:46,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:46,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737850088] [2024-06-21 21:42:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:46,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:47,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:47,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737850088] [2024-06-21 21:42:47,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737850088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:47,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:47,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:47,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137021342] [2024-06-21 21:42:47,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:47,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:47,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:47,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:47,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:47,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 170 transitions, 1673 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) [2024-06-21 21:42:47,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:47,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:47,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:47,807 INFO L124 PetriNetUnfolderBase]: 1652/2614 cut-off events. [2024-06-21 21:42:47,807 INFO L125 PetriNetUnfolderBase]: For 37658/37661 co-relation queries the response was YES. [2024-06-21 21:42:47,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14758 conditions, 2614 events. 1652/2614 cut-off events. For 37658/37661 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13328 event pairs, 399 based on Foata normal form. 5/2615 useless extension candidates. Maximal degree in co-relation 14692. Up to 2428 conditions per place. [2024-06-21 21:42:47,826 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 146 selfloop transitions, 35 changer transitions 0/192 dead transitions. [2024-06-21 21:42:47,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 192 transitions, 2174 flow [2024-06-21 21:42:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:42:47,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:42:47,827 INFO L175 Difference]: Start difference. First operand has 133 places, 170 transitions, 1673 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:42:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 192 transitions, 2174 flow [2024-06-21 21:42:47,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 192 transitions, 2154 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 21:42:47,883 INFO L231 Difference]: Finished difference. Result has 139 places, 176 transitions, 1811 flow [2024-06-21 21:42:47,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1811, PETRI_PLACES=139, PETRI_TRANSITIONS=176} [2024-06-21 21:42:47,884 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-21 21:42:47,884 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 176 transitions, 1811 flow [2024-06-21 21:42:47,884 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) [2024-06-21 21:42:47,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:47,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:47,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:42:47,884 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:47,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1569157762, now seen corresponding path program 2 times [2024-06-21 21:42:47,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:47,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718078956] [2024-06-21 21:42:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:47,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:48,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718078956] [2024-06-21 21:42:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718078956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:48,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:48,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:48,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745411764] [2024-06-21 21:42:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:48,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:48,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 176 transitions, 1811 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:48,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:48,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:48,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:48,991 INFO L124 PetriNetUnfolderBase]: 1751/2721 cut-off events. [2024-06-21 21:42:48,991 INFO L125 PetriNetUnfolderBase]: For 40972/40972 co-relation queries the response was YES. [2024-06-21 21:42:49,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15528 conditions, 2721 events. 1751/2721 cut-off events. For 40972/40972 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13705 event pairs, 419 based on Foata normal form. 2/2722 useless extension candidates. Maximal degree in co-relation 15459. Up to 2619 conditions per place. [2024-06-21 21:42:49,014 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-21 21:42:49,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 195 transitions, 2324 flow [2024-06-21 21:42:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 21:42:49,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-21 21:42:49,016 INFO L175 Difference]: Start difference. First operand has 139 places, 176 transitions, 1811 flow. Second operand 6 states and 109 transitions. [2024-06-21 21:42:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 195 transitions, 2324 flow [2024-06-21 21:42:49,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 195 transitions, 2223 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:49,075 INFO L231 Difference]: Finished difference. Result has 142 places, 180 transitions, 1816 flow [2024-06-21 21:42:49,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1816, PETRI_PLACES=142, PETRI_TRANSITIONS=180} [2024-06-21 21:42:49,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-21 21:42:49,076 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 180 transitions, 1816 flow [2024-06-21 21:42:49,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:49,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:49,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:42:49,076 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:49,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -366703462, now seen corresponding path program 3 times [2024-06-21 21:42:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926724287] [2024-06-21 21:42:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926724287] [2024-06-21 21:42:49,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926724287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:49,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:49,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086147806] [2024-06-21 21:42:49,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:49,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:49,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 180 transitions, 1816 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:49,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:49,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:49,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:50,131 INFO L124 PetriNetUnfolderBase]: 1745/2713 cut-off events. [2024-06-21 21:42:50,131 INFO L125 PetriNetUnfolderBase]: For 43153/43153 co-relation queries the response was YES. [2024-06-21 21:42:50,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15543 conditions, 2713 events. 1745/2713 cut-off events. For 43153/43153 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13652 event pairs, 417 based on Foata normal form. 2/2714 useless extension candidates. Maximal degree in co-relation 15472. Up to 2641 conditions per place. [2024-06-21 21:42:50,151 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 175 selfloop transitions, 12 changer transitions 0/191 dead transitions. [2024-06-21 21:42:50,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 191 transitions, 2235 flow [2024-06-21 21:42:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:42:50,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 21:42:50,153 INFO L175 Difference]: Start difference. First operand has 142 places, 180 transitions, 1816 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:42:50,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 191 transitions, 2235 flow [2024-06-21 21:42:50,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 191 transitions, 2184 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:50,217 INFO L231 Difference]: Finished difference. Result has 144 places, 181 transitions, 1805 flow [2024-06-21 21:42:50,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1805, PETRI_PLACES=144, PETRI_TRANSITIONS=181} [2024-06-21 21:42:50,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 21:42:50,218 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 181 transitions, 1805 flow [2024-06-21 21:42:50,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:50,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:50,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:50,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:42:50,219 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:50,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1569157576, now seen corresponding path program 3 times [2024-06-21 21:42:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:50,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707172303] [2024-06-21 21:42:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:50,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:50,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:50,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707172303] [2024-06-21 21:42:50,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707172303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:50,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:50,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:50,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767638775] [2024-06-21 21:42:50,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:50,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:51,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:42:51,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 181 transitions, 1805 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) [2024-06-21 21:42:51,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:51,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:42:51,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:51,491 INFO L124 PetriNetUnfolderBase]: 1645/2604 cut-off events. [2024-06-21 21:42:51,491 INFO L125 PetriNetUnfolderBase]: For 41742/41745 co-relation queries the response was YES. [2024-06-21 21:42:51,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14889 conditions, 2604 events. 1645/2604 cut-off events. For 41742/41745 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13207 event pairs, 395 based on Foata normal form. 5/2605 useless extension candidates. Maximal degree in co-relation 14818. Up to 2395 conditions per place. [2024-06-21 21:42:51,511 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 146 selfloop transitions, 39 changer transitions 0/198 dead transitions. [2024-06-21 21:42:51,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 2239 flow [2024-06-21 21:42:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 21:42:51,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 21:42:51,513 INFO L175 Difference]: Start difference. First operand has 144 places, 181 transitions, 1805 flow. Second operand 6 states and 115 transitions. [2024-06-21 21:42:51,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 2239 flow [2024-06-21 21:42:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 2191 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:51,624 INFO L231 Difference]: Finished difference. Result has 147 places, 181 transitions, 1853 flow [2024-06-21 21:42:51,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1853, PETRI_PLACES=147, PETRI_TRANSITIONS=181} [2024-06-21 21:42:51,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-21 21:42:51,625 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 181 transitions, 1853 flow [2024-06-21 21:42:51,625 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) [2024-06-21 21:42:51,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:51,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:42:51,626 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:51,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash -366694534, now seen corresponding path program 1 times [2024-06-21 21:42:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393197177] [2024-06-21 21:42:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:52,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:52,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393197177] [2024-06-21 21:42:52,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393197177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:52,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:52,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138145817] [2024-06-21 21:42:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:52,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:52,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:52,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:52,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 181 transitions, 1853 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:52,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:52,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:52,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:53,352 INFO L124 PetriNetUnfolderBase]: 1731/2694 cut-off events. [2024-06-21 21:42:53,352 INFO L125 PetriNetUnfolderBase]: For 44478/44478 co-relation queries the response was YES. [2024-06-21 21:42:53,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15512 conditions, 2694 events. 1731/2694 cut-off events. For 44478/44478 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13500 event pairs, 413 based on Foata normal form. 2/2695 useless extension candidates. Maximal degree in co-relation 15440. Up to 2619 conditions per place. [2024-06-21 21:42:53,373 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 176 selfloop transitions, 13 changer transitions 0/193 dead transitions. [2024-06-21 21:42:53,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 193 transitions, 2282 flow [2024-06-21 21:42:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:42:53,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 21:42:53,374 INFO L175 Difference]: Start difference. First operand has 147 places, 181 transitions, 1853 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:42:53,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 193 transitions, 2282 flow [2024-06-21 21:42:53,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 193 transitions, 2193 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:53,426 INFO L231 Difference]: Finished difference. Result has 148 places, 183 transitions, 1815 flow [2024-06-21 21:42:53,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1815, PETRI_PLACES=148, PETRI_TRANSITIONS=183} [2024-06-21 21:42:53,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-21 21:42:53,427 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 183 transitions, 1815 flow [2024-06-21 21:42:53,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:53,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:53,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:53,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:42:53,428 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:53,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1836112693, now seen corresponding path program 1 times [2024-06-21 21:42:53,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:53,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129840199] [2024-06-21 21:42:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:53,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:54,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:54,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129840199] [2024-06-21 21:42:54,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129840199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:54,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:54,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504532472] [2024-06-21 21:42:54,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:54,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:54,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 183 transitions, 1815 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:54,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:54,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:54,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:55,455 INFO L124 PetriNetUnfolderBase]: 1772/2766 cut-off events. [2024-06-21 21:42:55,455 INFO L125 PetriNetUnfolderBase]: For 49685/49685 co-relation queries the response was YES. [2024-06-21 21:42:55,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15963 conditions, 2766 events. 1772/2766 cut-off events. For 49685/49685 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13882 event pairs, 269 based on Foata normal form. 12/2777 useless extension candidates. Maximal degree in co-relation 15890. Up to 2497 conditions per place. [2024-06-21 21:42:55,474 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 20 changer transitions 0/213 dead transitions. [2024-06-21 21:42:55,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 213 transitions, 2348 flow [2024-06-21 21:42:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:42:55,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 21:42:55,475 INFO L175 Difference]: Start difference. First operand has 148 places, 183 transitions, 1815 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:42:55,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 213 transitions, 2348 flow [2024-06-21 21:42:55,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 213 transitions, 2311 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:55,529 INFO L231 Difference]: Finished difference. Result has 152 places, 184 transitions, 1848 flow [2024-06-21 21:42:55,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1848, PETRI_PLACES=152, PETRI_TRANSITIONS=184} [2024-06-21 21:42:55,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-21 21:42:55,530 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 184 transitions, 1848 flow [2024-06-21 21:42:55,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:55,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:55,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:55,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:42:55,531 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:55,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1263993705, now seen corresponding path program 2 times [2024-06-21 21:42:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:55,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276161392] [2024-06-21 21:42:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:56,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:56,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276161392] [2024-06-21 21:42:56,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276161392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:56,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:56,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:56,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557384834] [2024-06-21 21:42:56,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:56,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:56,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:57,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:57,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 184 transitions, 1848 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:57,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:57,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:57,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:57,709 INFO L124 PetriNetUnfolderBase]: 1854/2908 cut-off events. [2024-06-21 21:42:57,710 INFO L125 PetriNetUnfolderBase]: For 53842/53842 co-relation queries the response was YES. [2024-06-21 21:42:57,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16764 conditions, 2908 events. 1854/2908 cut-off events. For 53842/53842 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14931 event pairs, 416 based on Foata normal form. 12/2919 useless extension candidates. Maximal degree in co-relation 16690. Up to 2479 conditions per place. [2024-06-21 21:42:57,730 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 43 changer transitions 0/215 dead transitions. [2024-06-21 21:42:57,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 215 transitions, 2410 flow [2024-06-21 21:42:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:42:57,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:42:57,732 INFO L175 Difference]: Start difference. First operand has 152 places, 184 transitions, 1848 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:42:57,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 215 transitions, 2410 flow [2024-06-21 21:42:57,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 215 transitions, 2360 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:57,795 INFO L231 Difference]: Finished difference. Result has 154 places, 186 transitions, 1930 flow [2024-06-21 21:42:57,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1930, PETRI_PLACES=154, PETRI_TRANSITIONS=186} [2024-06-21 21:42:57,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 21:42:57,796 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 186 transitions, 1930 flow [2024-06-21 21:42:57,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:57,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:57,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:57,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:42:57,796 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:57,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1268577675, now seen corresponding path program 3 times [2024-06-21 21:42:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:57,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569366742] [2024-06-21 21:42:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:57,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:59,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569366742] [2024-06-21 21:42:59,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569366742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:59,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:59,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:42:59,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836415324] [2024-06-21 21:42:59,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:59,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:42:59,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:59,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:42:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:42:59,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:42:59,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 186 transitions, 1930 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:59,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:42:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:59,855 INFO L124 PetriNetUnfolderBase]: 1834/2876 cut-off events. [2024-06-21 21:42:59,855 INFO L125 PetriNetUnfolderBase]: For 55272/55272 co-relation queries the response was YES. [2024-06-21 21:42:59,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16608 conditions, 2876 events. 1834/2876 cut-off events. For 55272/55272 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14748 event pairs, 398 based on Foata normal form. 12/2887 useless extension candidates. Maximal degree in co-relation 16533. Up to 2452 conditions per place. [2024-06-21 21:42:59,873 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 42 changer transitions 0/215 dead transitions. [2024-06-21 21:42:59,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 215 transitions, 2422 flow [2024-06-21 21:42:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:42:59,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:42:59,874 INFO L175 Difference]: Start difference. First operand has 154 places, 186 transitions, 1930 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:42:59,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 215 transitions, 2422 flow [2024-06-21 21:42:59,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 215 transitions, 2326 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:59,934 INFO L231 Difference]: Finished difference. Result has 155 places, 185 transitions, 1884 flow [2024-06-21 21:42:59,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1884, PETRI_PLACES=155, PETRI_TRANSITIONS=185} [2024-06-21 21:42:59,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-21 21:42:59,935 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 185 transitions, 1884 flow [2024-06-21 21:42:59,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:59,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:59,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:59,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:42:59,936 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)] === [2024-06-21 21:42:59,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1222212041, now seen corresponding path program 1 times [2024-06-21 21:42:59,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:59,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025714841] [2024-06-21 21:42:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:59,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025714841] [2024-06-21 21:43:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025714841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192629295] [2024-06-21 21:43:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:00,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:00,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 185 transitions, 1884 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:00,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:00,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:00,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:01,367 INFO L124 PetriNetUnfolderBase]: 1775/2814 cut-off events. [2024-06-21 21:43:01,367 INFO L125 PetriNetUnfolderBase]: For 55865/55868 co-relation queries the response was YES. [2024-06-21 21:43:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16337 conditions, 2814 events. 1775/2814 cut-off events. For 55865/55868 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14608 event pairs, 417 based on Foata normal form. 4/2814 useless extension candidates. Maximal degree in co-relation 16261. Up to 2560 conditions per place. [2024-06-21 21:43:01,392 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 46 changer transitions 0/224 dead transitions. [2024-06-21 21:43:01,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 224 transitions, 2570 flow [2024-06-21 21:43:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:43:01,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:43:01,394 INFO L175 Difference]: Start difference. First operand has 155 places, 185 transitions, 1884 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:43:01,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 224 transitions, 2570 flow [2024-06-21 21:43:01,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 224 transitions, 2459 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:01,481 INFO L231 Difference]: Finished difference. Result has 158 places, 203 transitions, 2078 flow [2024-06-21 21:43:01,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2078, PETRI_PLACES=158, PETRI_TRANSITIONS=203} [2024-06-21 21:43:01,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 21:43:01,481 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 203 transitions, 2078 flow [2024-06-21 21:43:01,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:01,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:01,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:01,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:43:01,482 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:01,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1222302406, now seen corresponding path program 1 times [2024-06-21 21:43:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027315665] [2024-06-21 21:43:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:01,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:02,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:02,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027315665] [2024-06-21 21:43:02,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027315665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:02,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:02,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333506966] [2024-06-21 21:43:02,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:02,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:02,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:02,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:02,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 203 transitions, 2078 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:02,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:02,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:02,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:02,753 INFO L124 PetriNetUnfolderBase]: 1862/2914 cut-off events. [2024-06-21 21:43:02,753 INFO L125 PetriNetUnfolderBase]: For 60212/60212 co-relation queries the response was YES. [2024-06-21 21:43:02,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 2914 events. 1862/2914 cut-off events. For 60212/60212 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14962 event pairs, 434 based on Foata normal form. 2/2915 useless extension candidates. Maximal degree in co-relation 17143. Up to 2768 conditions per place. [2024-06-21 21:43:02,775 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 200 selfloop transitions, 35 changer transitions 0/239 dead transitions. [2024-06-21 21:43:02,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 239 transitions, 2825 flow [2024-06-21 21:43:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:43:02,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:43:02,776 INFO L175 Difference]: Start difference. First operand has 158 places, 203 transitions, 2078 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:43:02,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 239 transitions, 2825 flow [2024-06-21 21:43:02,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 239 transitions, 2768 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 21:43:02,870 INFO L231 Difference]: Finished difference. Result has 166 places, 216 transitions, 2267 flow [2024-06-21 21:43:02,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2267, PETRI_PLACES=166, PETRI_TRANSITIONS=216} [2024-06-21 21:43:02,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 21:43:02,871 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 216 transitions, 2267 flow [2024-06-21 21:43:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:02,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:02,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:02,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:43:02,871 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:02,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1696710343, now seen corresponding path program 2 times [2024-06-21 21:43:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:02,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973190427] [2024-06-21 21:43:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:02,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:03,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:03,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973190427] [2024-06-21 21:43:03,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973190427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:03,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:03,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:03,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462239101] [2024-06-21 21:43:03,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:03,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:03,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:03,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 216 transitions, 2267 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) [2024-06-21 21:43:03,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:03,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:03,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:04,425 INFO L124 PetriNetUnfolderBase]: 1811/2859 cut-off events. [2024-06-21 21:43:04,425 INFO L125 PetriNetUnfolderBase]: For 64011/64014 co-relation queries the response was YES. [2024-06-21 21:43:04,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17220 conditions, 2859 events. 1811/2859 cut-off events. For 64011/64014 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14777 event pairs, 419 based on Foata normal form. 4/2859 useless extension candidates. Maximal degree in co-relation 17138. Up to 2625 conditions per place. [2024-06-21 21:43:04,449 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 170 selfloop transitions, 50 changer transitions 0/237 dead transitions. [2024-06-21 21:43:04,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 237 transitions, 2798 flow [2024-06-21 21:43:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:43:04,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 21:43:04,450 INFO L175 Difference]: Start difference. First operand has 166 places, 216 transitions, 2267 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:43:04,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 237 transitions, 2798 flow [2024-06-21 21:43:04,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 237 transitions, 2738 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 21:43:04,531 INFO L231 Difference]: Finished difference. Result has 172 places, 220 transitions, 2359 flow [2024-06-21 21:43:04,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2359, PETRI_PLACES=172, PETRI_TRANSITIONS=220} [2024-06-21 21:43:04,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 21:43:04,532 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 220 transitions, 2359 flow [2024-06-21 21:43:04,532 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) [2024-06-21 21:43:04,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:04,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:04,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:43:04,532 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:04,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1226021321, now seen corresponding path program 3 times [2024-06-21 21:43:04,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:04,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140677905] [2024-06-21 21:43:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:04,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:05,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140677905] [2024-06-21 21:43:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140677905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:05,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:05,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949927160] [2024-06-21 21:43:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:05,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:05,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:05,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:05,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 220 transitions, 2359 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:05,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:05,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:05,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:06,090 INFO L124 PetriNetUnfolderBase]: 1820/2874 cut-off events. [2024-06-21 21:43:06,090 INFO L125 PetriNetUnfolderBase]: For 68007/68010 co-relation queries the response was YES. [2024-06-21 21:43:06,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17536 conditions, 2874 events. 1820/2874 cut-off events. For 68007/68010 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14867 event pairs, 417 based on Foata normal form. 4/2874 useless extension candidates. Maximal degree in co-relation 17452. Up to 2666 conditions per place. [2024-06-21 21:43:06,116 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 184 selfloop transitions, 38 changer transitions 0/239 dead transitions. [2024-06-21 21:43:06,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 239 transitions, 2901 flow [2024-06-21 21:43:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:43:06,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:43:06,118 INFO L175 Difference]: Start difference. First operand has 172 places, 220 transitions, 2359 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:43:06,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 239 transitions, 2901 flow [2024-06-21 21:43:06,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 239 transitions, 2784 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:06,210 INFO L231 Difference]: Finished difference. Result has 175 places, 225 transitions, 2395 flow [2024-06-21 21:43:06,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2395, PETRI_PLACES=175, PETRI_TRANSITIONS=225} [2024-06-21 21:43:06,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 21:43:06,211 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 225 transitions, 2395 flow [2024-06-21 21:43:06,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:06,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:06,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:06,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:43:06,212 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:06,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1700429568, now seen corresponding path program 2 times [2024-06-21 21:43:06,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:06,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994462109] [2024-06-21 21:43:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:06,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:06,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994462109] [2024-06-21 21:43:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994462109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:07,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:07,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:07,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315227739] [2024-06-21 21:43:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:07,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:07,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 225 transitions, 2395 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:07,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:07,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:07,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:07,698 INFO L124 PetriNetUnfolderBase]: 1908/2978 cut-off events. [2024-06-21 21:43:07,698 INFO L125 PetriNetUnfolderBase]: For 73367/73367 co-relation queries the response was YES. [2024-06-21 21:43:07,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18365 conditions, 2978 events. 1908/2978 cut-off events. For 73367/73367 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15303 event pairs, 435 based on Foata normal form. 2/2979 useless extension candidates. Maximal degree in co-relation 18280. Up to 2859 conditions per place. [2024-06-21 21:43:07,722 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 216 selfloop transitions, 31 changer transitions 0/251 dead transitions. [2024-06-21 21:43:07,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 251 transitions, 3088 flow [2024-06-21 21:43:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:43:07,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 21:43:07,724 INFO L175 Difference]: Start difference. First operand has 175 places, 225 transitions, 2395 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:43:07,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 251 transitions, 3088 flow [2024-06-21 21:43:07,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 251 transitions, 2996 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:07,812 INFO L231 Difference]: Finished difference. Result has 180 places, 232 transitions, 2459 flow [2024-06-21 21:43:07,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2304, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2459, PETRI_PLACES=180, PETRI_TRANSITIONS=232} [2024-06-21 21:43:07,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-21 21:43:07,812 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 232 transitions, 2459 flow [2024-06-21 21:43:07,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:07,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:07,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:07,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:43:07,813 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:07,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1226027056, now seen corresponding path program 3 times [2024-06-21 21:43:07,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:07,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888386650] [2024-06-21 21:43:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:07,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:08,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:08,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888386650] [2024-06-21 21:43:08,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888386650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:08,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:08,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260389450] [2024-06-21 21:43:08,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:08,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:08,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:08,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:08,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 232 transitions, 2459 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:08,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:08,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:08,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:09,388 INFO L124 PetriNetUnfolderBase]: 1902/2972 cut-off events. [2024-06-21 21:43:09,388 INFO L125 PetriNetUnfolderBase]: For 76283/76283 co-relation queries the response was YES. [2024-06-21 21:43:09,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18403 conditions, 2972 events. 1902/2972 cut-off events. For 76283/76283 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15298 event pairs, 435 based on Foata normal form. 2/2973 useless extension candidates. Maximal degree in co-relation 18316. Up to 2854 conditions per place. [2024-06-21 21:43:09,412 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 215 selfloop transitions, 35 changer transitions 0/254 dead transitions. [2024-06-21 21:43:09,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 3047 flow [2024-06-21 21:43:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:43:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:43:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-21 21:43:09,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2024-06-21 21:43:09,413 INFO L175 Difference]: Start difference. First operand has 180 places, 232 transitions, 2459 flow. Second operand 11 states and 171 transitions. [2024-06-21 21:43:09,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 3047 flow [2024-06-21 21:43:09,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 254 transitions, 2986 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:09,521 INFO L231 Difference]: Finished difference. Result has 187 places, 234 transitions, 2496 flow [2024-06-21 21:43:09,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2496, PETRI_PLACES=187, PETRI_TRANSITIONS=234} [2024-06-21 21:43:09,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-21 21:43:09,521 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 234 transitions, 2496 flow [2024-06-21 21:43:09,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:09,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:09,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:09,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:43:09,522 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:09,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1509744210, now seen corresponding path program 4 times [2024-06-21 21:43:09,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:09,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080581701] [2024-06-21 21:43:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:10,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:10,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080581701] [2024-06-21 21:43:10,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080581701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:10,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:10,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:10,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373014136] [2024-06-21 21:43:10,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:10,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:10,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:10,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:10,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:10,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 234 transitions, 2496 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:10,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:10,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:10,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:10,954 INFO L124 PetriNetUnfolderBase]: 1928/3006 cut-off events. [2024-06-21 21:43:10,954 INFO L125 PetriNetUnfolderBase]: For 81614/81614 co-relation queries the response was YES. [2024-06-21 21:43:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18868 conditions, 3006 events. 1928/3006 cut-off events. For 81614/81614 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15433 event pairs, 442 based on Foata normal form. 2/3007 useless extension candidates. Maximal degree in co-relation 18779. Up to 2876 conditions per place. [2024-06-21 21:43:10,982 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 225 selfloop transitions, 30 changer transitions 0/259 dead transitions. [2024-06-21 21:43:10,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 259 transitions, 3280 flow [2024-06-21 21:43:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:43:10,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:43:10,983 INFO L175 Difference]: Start difference. First operand has 187 places, 234 transitions, 2496 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:43:10,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 259 transitions, 3280 flow [2024-06-21 21:43:11,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 259 transitions, 3216 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:11,102 INFO L231 Difference]: Finished difference. Result has 188 places, 241 transitions, 2597 flow [2024-06-21 21:43:11,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2597, PETRI_PLACES=188, PETRI_TRANSITIONS=241} [2024-06-21 21:43:11,103 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 21:43:11,103 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 241 transitions, 2597 flow [2024-06-21 21:43:11,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:11,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:11,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:11,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:43:11,104 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:11,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1509738630, now seen corresponding path program 5 times [2024-06-21 21:43:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:11,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102152848] [2024-06-21 21:43:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:11,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:11,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102152848] [2024-06-21 21:43:11,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102152848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:11,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:11,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971072516] [2024-06-21 21:43:11,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:11,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:11,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:11,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 241 transitions, 2597 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:11,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:11,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:11,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:12,418 INFO L124 PetriNetUnfolderBase]: 1922/2998 cut-off events. [2024-06-21 21:43:12,418 INFO L125 PetriNetUnfolderBase]: For 85096/85096 co-relation queries the response was YES. [2024-06-21 21:43:12,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18948 conditions, 2998 events. 1922/2998 cut-off events. For 85096/85096 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15394 event pairs, 438 based on Foata normal form. 2/2999 useless extension candidates. Maximal degree in co-relation 18856. Up to 2871 conditions per place. [2024-06-21 21:43:12,445 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 225 selfloop transitions, 32 changer transitions 0/261 dead transitions. [2024-06-21 21:43:12,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 261 transitions, 3247 flow [2024-06-21 21:43:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:43:12,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 21:43:12,447 INFO L175 Difference]: Start difference. First operand has 188 places, 241 transitions, 2597 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:43:12,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 261 transitions, 3247 flow [2024-06-21 21:43:12,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 261 transitions, 3176 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 21:43:12,554 INFO L231 Difference]: Finished difference. Result has 192 places, 241 transitions, 2596 flow [2024-06-21 21:43:12,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2596, PETRI_PLACES=192, PETRI_TRANSITIONS=241} [2024-06-21 21:43:12,554 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-21 21:43:12,555 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 241 transitions, 2596 flow [2024-06-21 21:43:12,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:12,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:12,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:43:12,555 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:12,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1399245925, now seen corresponding path program 4 times [2024-06-21 21:43:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324401751] [2024-06-21 21:43:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:13,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:13,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324401751] [2024-06-21 21:43:13,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324401751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:13,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:13,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:13,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723605991] [2024-06-21 21:43:13,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:13,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:13,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:13,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:13,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 241 transitions, 2596 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:13,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:13,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:13,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:14,014 INFO L124 PetriNetUnfolderBase]: 1855/2923 cut-off events. [2024-06-21 21:43:14,015 INFO L125 PetriNetUnfolderBase]: For 87642/87645 co-relation queries the response was YES. [2024-06-21 21:43:14,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18414 conditions, 2923 events. 1855/2923 cut-off events. For 87642/87645 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15106 event pairs, 425 based on Foata normal form. 4/2923 useless extension candidates. Maximal degree in co-relation 18321. Up to 2670 conditions per place. [2024-06-21 21:43:14,042 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 42 changer transitions 0/260 dead transitions. [2024-06-21 21:43:14,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 260 transitions, 3130 flow [2024-06-21 21:43:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 21:43:14,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:43:14,043 INFO L175 Difference]: Start difference. First operand has 192 places, 241 transitions, 2596 flow. Second operand 7 states and 130 transitions. [2024-06-21 21:43:14,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 260 transitions, 3130 flow [2024-06-21 21:43:14,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 3007 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:14,179 INFO L231 Difference]: Finished difference. Result has 193 places, 241 transitions, 2569 flow [2024-06-21 21:43:14,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2569, PETRI_PLACES=193, PETRI_TRANSITIONS=241} [2024-06-21 21:43:14,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 21:43:14,180 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 241 transitions, 2569 flow [2024-06-21 21:43:14,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:14,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:14,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:14,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:43:14,181 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:14,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1517095860, now seen corresponding path program 6 times [2024-06-21 21:43:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:14,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741535399] [2024-06-21 21:43:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:14,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:14,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741535399] [2024-06-21 21:43:14,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741535399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:14,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:14,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947682354] [2024-06-21 21:43:14,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:14,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:14,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 241 transitions, 2569 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:14,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:14,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:14,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:15,489 INFO L124 PetriNetUnfolderBase]: 1910/2980 cut-off events. [2024-06-21 21:43:15,489 INFO L125 PetriNetUnfolderBase]: For 91366/91366 co-relation queries the response was YES. [2024-06-21 21:43:15,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18841 conditions, 2980 events. 1910/2980 cut-off events. For 91366/91366 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15271 event pairs, 439 based on Foata normal form. 2/2981 useless extension candidates. Maximal degree in co-relation 18748. Up to 2902 conditions per place. [2024-06-21 21:43:15,514 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 234 selfloop transitions, 16 changer transitions 0/254 dead transitions. [2024-06-21 21:43:15,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 254 transitions, 3120 flow [2024-06-21 21:43:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:43:15,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 21:43:15,516 INFO L175 Difference]: Start difference. First operand has 193 places, 241 transitions, 2569 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:43:15,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 254 transitions, 3120 flow [2024-06-21 21:43:15,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 254 transitions, 2984 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:15,649 INFO L231 Difference]: Finished difference. Result has 193 places, 242 transitions, 2482 flow [2024-06-21 21:43:15,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2482, PETRI_PLACES=193, PETRI_TRANSITIONS=242} [2024-06-21 21:43:15,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 21:43:15,650 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 242 transitions, 2482 flow [2024-06-21 21:43:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:15,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:15,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:15,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:43:15,651 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:15,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1517362987, now seen corresponding path program 1 times [2024-06-21 21:43:15,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:15,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720123188] [2024-06-21 21:43:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:15,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:16,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:16,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720123188] [2024-06-21 21:43:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720123188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:16,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:16,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671330714] [2024-06-21 21:43:16,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:16,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:16,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:16,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:16,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 242 transitions, 2482 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:16,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:16,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:16,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:17,037 INFO L124 PetriNetUnfolderBase]: 1907/2980 cut-off events. [2024-06-21 21:43:17,037 INFO L125 PetriNetUnfolderBase]: For 94361/94361 co-relation queries the response was YES. [2024-06-21 21:43:17,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18773 conditions, 2980 events. 1907/2980 cut-off events. For 94361/94361 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15342 event pairs, 436 based on Foata normal form. 1/2980 useless extension candidates. Maximal degree in co-relation 18680. Up to 2900 conditions per place. [2024-06-21 21:43:17,063 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 233 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2024-06-21 21:43:17,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 255 transitions, 3050 flow [2024-06-21 21:43:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:43:17,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 21:43:17,064 INFO L175 Difference]: Start difference. First operand has 193 places, 242 transitions, 2482 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:43:17,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 255 transitions, 3050 flow [2024-06-21 21:43:17,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3018 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:17,197 INFO L231 Difference]: Finished difference. Result has 194 places, 245 transitions, 2532 flow [2024-06-21 21:43:17,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2532, PETRI_PLACES=194, PETRI_TRANSITIONS=245} [2024-06-21 21:43:17,198 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-21 21:43:17,198 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 245 transitions, 2532 flow [2024-06-21 21:43:17,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:17,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:17,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:17,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:43:17,199 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:17,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash 572748831, now seen corresponding path program 1 times [2024-06-21 21:43:17,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:17,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705940170] [2024-06-21 21:43:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:17,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705940170] [2024-06-21 21:43:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705940170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:18,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:18,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913539215] [2024-06-21 21:43:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:18,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:18,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:18,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 245 transitions, 2532 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:18,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:18,756 INFO L124 PetriNetUnfolderBase]: 2001/3123 cut-off events. [2024-06-21 21:43:18,757 INFO L125 PetriNetUnfolderBase]: For 104939/104943 co-relation queries the response was YES. [2024-06-21 21:43:18,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20138 conditions, 3123 events. 2001/3123 cut-off events. For 104939/104943 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16211 event pairs, 429 based on Foata normal form. 8/3130 useless extension candidates. Maximal degree in co-relation 20044. Up to 2897 conditions per place. [2024-06-21 21:43:18,784 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 230 selfloop transitions, 57 changer transitions 0/291 dead transitions. [2024-06-21 21:43:18,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 291 transitions, 3581 flow [2024-06-21 21:43:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:43:18,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 21:43:18,785 INFO L175 Difference]: Start difference. First operand has 194 places, 245 transitions, 2532 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:43:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 291 transitions, 3581 flow [2024-06-21 21:43:18,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 291 transitions, 3539 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:18,954 INFO L231 Difference]: Finished difference. Result has 201 places, 267 transitions, 2989 flow [2024-06-21 21:43:18,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2989, PETRI_PLACES=201, PETRI_TRANSITIONS=267} [2024-06-21 21:43:18,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-21 21:43:18,954 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 267 transitions, 2989 flow [2024-06-21 21:43:18,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:18,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:18,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:18,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:43:18,955 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:18,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:18,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1450165195, now seen corresponding path program 2 times [2024-06-21 21:43:18,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:18,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232858535] [2024-06-21 21:43:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:18,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:19,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:19,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232858535] [2024-06-21 21:43:19,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232858535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:19,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:19,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:19,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546133510] [2024-06-21 21:43:19,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:19,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:19,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:19,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:19,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:19,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 267 transitions, 2989 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:19,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:19,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:19,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:20,384 INFO L124 PetriNetUnfolderBase]: 2021/3158 cut-off events. [2024-06-21 21:43:20,384 INFO L125 PetriNetUnfolderBase]: For 112905/112909 co-relation queries the response was YES. [2024-06-21 21:43:20,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21238 conditions, 3158 events. 2021/3158 cut-off events. For 112905/112909 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16437 event pairs, 429 based on Foata normal form. 8/3165 useless extension candidates. Maximal degree in co-relation 21140. Up to 2913 conditions per place. [2024-06-21 21:43:20,416 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 229 selfloop transitions, 60 changer transitions 0/293 dead transitions. [2024-06-21 21:43:20,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 293 transitions, 3814 flow [2024-06-21 21:43:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:43:20,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:43:20,422 INFO L175 Difference]: Start difference. First operand has 201 places, 267 transitions, 2989 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:43:20,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 293 transitions, 3814 flow [2024-06-21 21:43:20,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 293 transitions, 3755 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 21:43:20,605 INFO L231 Difference]: Finished difference. Result has 207 places, 272 transitions, 3182 flow [2024-06-21 21:43:20,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3182, PETRI_PLACES=207, PETRI_TRANSITIONS=272} [2024-06-21 21:43:20,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-21 21:43:20,605 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 272 transitions, 3182 flow [2024-06-21 21:43:20,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:20,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:20,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:20,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:43:20,606 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:20,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1830088293, now seen corresponding path program 3 times [2024-06-21 21:43:20,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:20,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904301771] [2024-06-21 21:43:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:20,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:21,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904301771] [2024-06-21 21:43:21,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904301771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:21,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:21,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313242756] [2024-06-21 21:43:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:21,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:21,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:21,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:21,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 272 transitions, 3182 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:21,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:21,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:21,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:21,972 INFO L124 PetriNetUnfolderBase]: 2009/3142 cut-off events. [2024-06-21 21:43:21,972 INFO L125 PetriNetUnfolderBase]: For 115399/115403 co-relation queries the response was YES. [2024-06-21 21:43:21,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 3142 events. 2009/3142 cut-off events. For 115399/115403 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16377 event pairs, 431 based on Foata normal form. 8/3149 useless extension candidates. Maximal degree in co-relation 21243. Up to 3003 conditions per place. [2024-06-21 21:43:22,006 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 251 selfloop transitions, 28 changer transitions 0/283 dead transitions. [2024-06-21 21:43:22,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 283 transitions, 3784 flow [2024-06-21 21:43:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 21:43:22,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 21:43:22,007 INFO L175 Difference]: Start difference. First operand has 207 places, 272 transitions, 3182 flow. Second operand 6 states and 104 transitions. [2024-06-21 21:43:22,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 283 transitions, 3784 flow [2024-06-21 21:43:22,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 283 transitions, 3641 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:22,219 INFO L231 Difference]: Finished difference. Result has 207 places, 272 transitions, 3105 flow [2024-06-21 21:43:22,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3105, PETRI_PLACES=207, PETRI_TRANSITIONS=272} [2024-06-21 21:43:22,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-21 21:43:22,220 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 272 transitions, 3105 flow [2024-06-21 21:43:22,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:22,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:22,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:22,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:43:22,221 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)] === [2024-06-21 21:43:22,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1830079365, now seen corresponding path program 1 times [2024-06-21 21:43:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:22,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038741166] [2024-06-21 21:43:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:23,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038741166] [2024-06-21 21:43:23,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038741166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:23,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:23,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:23,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372616695] [2024-06-21 21:43:23,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:23,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:23,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:23,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:23,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:23,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 272 transitions, 3105 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:23,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:23,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:23,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:23,999 INFO L124 PetriNetUnfolderBase]: 2053/3208 cut-off events. [2024-06-21 21:43:24,000 INFO L125 PetriNetUnfolderBase]: For 116487/116487 co-relation queries the response was YES. [2024-06-21 21:43:24,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21336 conditions, 3208 events. 2053/3208 cut-off events. For 116487/116487 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16765 event pairs, 454 based on Foata normal form. 12/3219 useless extension candidates. Maximal degree in co-relation 21236. Up to 2969 conditions per place. [2024-06-21 21:43:24,033 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 247 selfloop transitions, 38 changer transitions 0/289 dead transitions. [2024-06-21 21:43:24,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 289 transitions, 3779 flow [2024-06-21 21:43:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:43:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:43:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 21:43:24,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-21 21:43:24,034 INFO L175 Difference]: Start difference. First operand has 207 places, 272 transitions, 3105 flow. Second operand 6 states and 109 transitions. [2024-06-21 21:43:24,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 289 transitions, 3779 flow [2024-06-21 21:43:24,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 289 transitions, 3725 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:24,223 INFO L231 Difference]: Finished difference. Result has 209 places, 273 transitions, 3149 flow [2024-06-21 21:43:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3149, PETRI_PLACES=209, PETRI_TRANSITIONS=273} [2024-06-21 21:43:24,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-21 21:43:24,224 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 273 transitions, 3149 flow [2024-06-21 21:43:24,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:24,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:24,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:43:24,225 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:24,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1161495265, now seen corresponding path program 4 times [2024-06-21 21:43:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795777313] [2024-06-21 21:43:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:24,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795777313] [2024-06-21 21:43:24,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795777313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:24,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:24,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66079792] [2024-06-21 21:43:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:25,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:25,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 273 transitions, 3149 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:25,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:25,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:25,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:25,785 INFO L124 PetriNetUnfolderBase]: 2115/3306 cut-off events. [2024-06-21 21:43:25,786 INFO L125 PetriNetUnfolderBase]: For 119812/119816 co-relation queries the response was YES. [2024-06-21 21:43:25,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22309 conditions, 3306 events. 2115/3306 cut-off events. For 119812/119816 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17375 event pairs, 451 based on Foata normal form. 8/3313 useless extension candidates. Maximal degree in co-relation 22208. Up to 3049 conditions per place. [2024-06-21 21:43:25,817 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 245 selfloop transitions, 62 changer transitions 0/311 dead transitions. [2024-06-21 21:43:25,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 311 transitions, 4117 flow [2024-06-21 21:43:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:43:25,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 21:43:25,819 INFO L175 Difference]: Start difference. First operand has 209 places, 273 transitions, 3149 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:43:25,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 311 transitions, 4117 flow [2024-06-21 21:43:26,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 311 transitions, 4045 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:26,032 INFO L231 Difference]: Finished difference. Result has 214 places, 284 transitions, 3374 flow [2024-06-21 21:43:26,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3077, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3374, PETRI_PLACES=214, PETRI_TRANSITIONS=284} [2024-06-21 21:43:26,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 21:43:26,033 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 284 transitions, 3374 flow [2024-06-21 21:43:26,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:26,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:26,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:43:26,034 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:26,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash 276823463, now seen corresponding path program 5 times [2024-06-21 21:43:26,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362617786] [2024-06-21 21:43:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:26,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:26,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362617786] [2024-06-21 21:43:26,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362617786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:26,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:26,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:26,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897303544] [2024-06-21 21:43:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:26,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:26,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:26,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:26,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:26,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 284 transitions, 3374 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:26,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:26,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:26,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:27,431 INFO L124 PetriNetUnfolderBase]: 2191/3411 cut-off events. [2024-06-21 21:43:27,432 INFO L125 PetriNetUnfolderBase]: For 134223/134227 co-relation queries the response was YES. [2024-06-21 21:43:27,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 3411 events. 2191/3411 cut-off events. For 134223/134227 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17946 event pairs, 454 based on Foata normal form. 8/3418 useless extension candidates. Maximal degree in co-relation 23700. Up to 3013 conditions per place. [2024-06-21 21:43:27,464 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 226 selfloop transitions, 88 changer transitions 0/318 dead transitions. [2024-06-21 21:43:27,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 4442 flow [2024-06-21 21:43:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:43:27,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:43:27,465 INFO L175 Difference]: Start difference. First operand has 214 places, 284 transitions, 3374 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:43:27,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 4442 flow [2024-06-21 21:43:27,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 318 transitions, 4190 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:27,731 INFO L231 Difference]: Finished difference. Result has 217 places, 296 transitions, 3518 flow [2024-06-21 21:43:27,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3136, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3518, PETRI_PLACES=217, PETRI_TRANSITIONS=296} [2024-06-21 21:43:27,732 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-21 21:43:27,732 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 296 transitions, 3518 flow [2024-06-21 21:43:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:27,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:27,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:27,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:43:27,733 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:27,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash -648289249, now seen corresponding path program 6 times [2024-06-21 21:43:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:27,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206372463] [2024-06-21 21:43:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:28,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206372463] [2024-06-21 21:43:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206372463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:28,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:28,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730427233] [2024-06-21 21:43:28,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:28,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:28,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:28,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 296 transitions, 3518 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:28,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:28,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:28,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:29,340 INFO L124 PetriNetUnfolderBase]: 2179/3397 cut-off events. [2024-06-21 21:43:29,341 INFO L125 PetriNetUnfolderBase]: For 138006/138010 co-relation queries the response was YES. [2024-06-21 21:43:29,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 3397 events. 2179/3397 cut-off events. For 138006/138010 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17916 event pairs, 461 based on Foata normal form. 8/3404 useless extension candidates. Maximal degree in co-relation 23974. Up to 3166 conditions per place. [2024-06-21 21:43:29,370 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 246 selfloop transitions, 63 changer transitions 0/313 dead transitions. [2024-06-21 21:43:29,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 313 transitions, 4203 flow [2024-06-21 21:43:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:43:29,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 21:43:29,371 INFO L175 Difference]: Start difference. First operand has 217 places, 296 transitions, 3518 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:43:29,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 313 transitions, 4203 flow [2024-06-21 21:43:29,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 313 transitions, 4083 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 21:43:29,580 INFO L231 Difference]: Finished difference. Result has 223 places, 296 transitions, 3531 flow [2024-06-21 21:43:29,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3531, PETRI_PLACES=223, PETRI_TRANSITIONS=296} [2024-06-21 21:43:29,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-21 21:43:29,581 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 296 transitions, 3531 flow [2024-06-21 21:43:29,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:29,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:29,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:43:29,581 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:29,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2133036877, now seen corresponding path program 7 times [2024-06-21 21:43:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:29,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098217627] [2024-06-21 21:43:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:30,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:30,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098217627] [2024-06-21 21:43:30,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098217627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:30,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:30,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:30,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122892554] [2024-06-21 21:43:30,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:30,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:30,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:30,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 296 transitions, 3531 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:30,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:30,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:30,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:31,095 INFO L124 PetriNetUnfolderBase]: 2167/3377 cut-off events. [2024-06-21 21:43:31,095 INFO L125 PetriNetUnfolderBase]: For 131017/131021 co-relation queries the response was YES. [2024-06-21 21:43:31,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23262 conditions, 3377 events. 2167/3377 cut-off events. For 131017/131021 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17777 event pairs, 455 based on Foata normal form. 8/3384 useless extension candidates. Maximal degree in co-relation 23158. Up to 3118 conditions per place. [2024-06-21 21:43:31,126 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 250 selfloop transitions, 63 changer transitions 0/317 dead transitions. [2024-06-21 21:43:31,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 317 transitions, 4248 flow [2024-06-21 21:43:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:43:31,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:43:31,127 INFO L175 Difference]: Start difference. First operand has 223 places, 296 transitions, 3531 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:43:31,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 317 transitions, 4248 flow [2024-06-21 21:43:31,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 317 transitions, 4064 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:43:31,380 INFO L231 Difference]: Finished difference. Result has 222 places, 296 transitions, 3490 flow [2024-06-21 21:43:31,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3347, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3490, PETRI_PLACES=222, PETRI_TRANSITIONS=296} [2024-06-21 21:43:31,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 21:43:31,381 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 296 transitions, 3490 flow [2024-06-21 21:43:31,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:31,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:31,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:31,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:43:31,382 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:31,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash -220389127, now seen corresponding path program 8 times [2024-06-21 21:43:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:31,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366761825] [2024-06-21 21:43:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:31,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:31,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366761825] [2024-06-21 21:43:31,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366761825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:31,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:31,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:31,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102613393] [2024-06-21 21:43:31,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:32,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:32,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 296 transitions, 3490 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:32,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:32,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:32,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:32,731 INFO L124 PetriNetUnfolderBase]: 2187/3409 cut-off events. [2024-06-21 21:43:32,732 INFO L125 PetriNetUnfolderBase]: For 136717/136721 co-relation queries the response was YES. [2024-06-21 21:43:32,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23608 conditions, 3409 events. 2187/3409 cut-off events. For 136717/136721 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17977 event pairs, 459 based on Foata normal form. 8/3416 useless extension candidates. Maximal degree in co-relation 23503. Up to 3261 conditions per place. [2024-06-21 21:43:32,765 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 28 changer transitions 0/311 dead transitions. [2024-06-21 21:43:32,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 311 transitions, 4214 flow [2024-06-21 21:43:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:43:32,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:43:32,767 INFO L175 Difference]: Start difference. First operand has 222 places, 296 transitions, 3490 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:43:32,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 311 transitions, 4214 flow [2024-06-21 21:43:32,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 311 transitions, 4100 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:32,972 INFO L231 Difference]: Finished difference. Result has 222 places, 299 transitions, 3504 flow [2024-06-21 21:43:32,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3504, PETRI_PLACES=222, PETRI_TRANSITIONS=299} [2024-06-21 21:43:32,972 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 21:43:32,972 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 299 transitions, 3504 flow [2024-06-21 21:43:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:32,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:32,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:32,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:43:32,973 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)] === [2024-06-21 21:43:32,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -442576357, now seen corresponding path program 9 times [2024-06-21 21:43:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:32,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373764366] [2024-06-21 21:43:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:32,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:33,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373764366] [2024-06-21 21:43:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373764366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:33,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183752529] [2024-06-21 21:43:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:33,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:33,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:33,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:33,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 299 transitions, 3504 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:33,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:33,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:33,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:34,289 INFO L124 PetriNetUnfolderBase]: 2207/3441 cut-off events. [2024-06-21 21:43:34,289 INFO L125 PetriNetUnfolderBase]: For 131860/131864 co-relation queries the response was YES. [2024-06-21 21:43:34,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23640 conditions, 3441 events. 2207/3441 cut-off events. For 131860/131864 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18199 event pairs, 446 based on Foata normal form. 8/3448 useless extension candidates. Maximal degree in co-relation 23536. Up to 3029 conditions per place. [2024-06-21 21:43:34,323 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 223 selfloop transitions, 95 changer transitions 0/322 dead transitions. [2024-06-21 21:43:34,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 322 transitions, 4392 flow [2024-06-21 21:43:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:43:34,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:43:34,324 INFO L175 Difference]: Start difference. First operand has 222 places, 299 transitions, 3504 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:43:34,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 322 transitions, 4392 flow [2024-06-21 21:43:34,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 322 transitions, 4266 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:34,539 INFO L231 Difference]: Finished difference. Result has 224 places, 302 transitions, 3644 flow [2024-06-21 21:43:34,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3644, PETRI_PLACES=224, PETRI_TRANSITIONS=302} [2024-06-21 21:43:34,539 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 21:43:34,540 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 302 transitions, 3644 flow [2024-06-21 21:43:34,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:34,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:34,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:34,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:43:34,540 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)] === [2024-06-21 21:43:34,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:34,541 INFO L85 PathProgramCache]: Analyzing trace with hash -214675207, now seen corresponding path program 10 times [2024-06-21 21:43:34,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:34,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684923683] [2024-06-21 21:43:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:34,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:35,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:35,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684923683] [2024-06-21 21:43:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684923683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:35,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618006436] [2024-06-21 21:43:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:35,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:35,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 302 transitions, 3644 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:35,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:35,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:35,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:35,857 INFO L124 PetriNetUnfolderBase]: 2195/3425 cut-off events. [2024-06-21 21:43:35,858 INFO L125 PetriNetUnfolderBase]: For 133747/133751 co-relation queries the response was YES. [2024-06-21 21:43:35,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23627 conditions, 3425 events. 2195/3425 cut-off events. For 133747/133751 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18125 event pairs, 453 based on Foata normal form. 8/3432 useless extension candidates. Maximal degree in co-relation 23523. Up to 3237 conditions per place. [2024-06-21 21:43:35,893 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 276 selfloop transitions, 36 changer transitions 0/316 dead transitions. [2024-06-21 21:43:35,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 316 transitions, 4338 flow [2024-06-21 21:43:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:43:35,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:43:35,894 INFO L175 Difference]: Start difference. First operand has 224 places, 302 transitions, 3644 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:43:35,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 316 transitions, 4338 flow [2024-06-21 21:43:36,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 316 transitions, 4132 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:36,136 INFO L231 Difference]: Finished difference. Result has 226 places, 302 transitions, 3516 flow [2024-06-21 21:43:36,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3516, PETRI_PLACES=226, PETRI_TRANSITIONS=302} [2024-06-21 21:43:36,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-21 21:43:36,137 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 302 transitions, 3516 flow [2024-06-21 21:43:36,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:36,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:36,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:36,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:43:36,137 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)] === [2024-06-21 21:43:36,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash -206570629, now seen corresponding path program 2 times [2024-06-21 21:43:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:36,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043429517] [2024-06-21 21:43:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:37,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:37,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043429517] [2024-06-21 21:43:37,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043429517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:37,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:37,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:37,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888977748] [2024-06-21 21:43:37,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:37,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:37,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:37,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:37,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:37,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:37,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 302 transitions, 3516 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:37,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:37,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:37,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:37,923 INFO L124 PetriNetUnfolderBase]: 2239/3495 cut-off events. [2024-06-21 21:43:37,923 INFO L125 PetriNetUnfolderBase]: For 140169/140169 co-relation queries the response was YES. [2024-06-21 21:43:37,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23633 conditions, 3495 events. 2239/3495 cut-off events. For 140169/140169 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18572 event pairs, 472 based on Foata normal form. 12/3506 useless extension candidates. Maximal degree in co-relation 23529. Up to 3226 conditions per place. [2024-06-21 21:43:37,960 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 278 selfloop transitions, 40 changer transitions 0/322 dead transitions. [2024-06-21 21:43:37,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 322 transitions, 4288 flow [2024-06-21 21:43:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:43:37,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 21:43:37,961 INFO L175 Difference]: Start difference. First operand has 226 places, 302 transitions, 3516 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:43:37,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 322 transitions, 4288 flow [2024-06-21 21:43:38,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 322 transitions, 4040 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 21:43:38,236 INFO L231 Difference]: Finished difference. Result has 225 places, 303 transitions, 3369 flow [2024-06-21 21:43:38,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3369, PETRI_PLACES=225, PETRI_TRANSITIONS=303} [2024-06-21 21:43:38,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 21:43:38,236 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 303 transitions, 3369 flow [2024-06-21 21:43:38,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:38,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:38,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:38,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:43:38,237 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)] === [2024-06-21 21:43:38,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash -206095399, now seen corresponding path program 3 times [2024-06-21 21:43:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:38,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720965221] [2024-06-21 21:43:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:39,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720965221] [2024-06-21 21:43:39,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720965221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:39,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:39,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:39,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636648299] [2024-06-21 21:43:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:39,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:39,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 303 transitions, 3369 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:39,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:39,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:39,990 INFO L124 PetriNetUnfolderBase]: 2241/3503 cut-off events. [2024-06-21 21:43:39,990 INFO L125 PetriNetUnfolderBase]: For 137459/137459 co-relation queries the response was YES. [2024-06-21 21:43:40,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23264 conditions, 3503 events. 2241/3503 cut-off events. For 137459/137459 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18601 event pairs, 462 based on Foata normal form. 8/3510 useless extension candidates. Maximal degree in co-relation 23161. Up to 3142 conditions per place. [2024-06-21 21:43:40,022 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 279 selfloop transitions, 42 changer transitions 0/325 dead transitions. [2024-06-21 21:43:40,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 325 transitions, 4165 flow [2024-06-21 21:43:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:43:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:43:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:43:40,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:43:40,024 INFO L175 Difference]: Start difference. First operand has 225 places, 303 transitions, 3369 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:43:40,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 325 transitions, 4165 flow [2024-06-21 21:43:40,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 325 transitions, 4082 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:40,235 INFO L231 Difference]: Finished difference. Result has 227 places, 304 transitions, 3392 flow [2024-06-21 21:43:40,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3286, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3392, PETRI_PLACES=227, PETRI_TRANSITIONS=304} [2024-06-21 21:43:40,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 21:43:40,235 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 304 transitions, 3392 flow [2024-06-21 21:43:40,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:40,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:40,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:43:40,236 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)] === [2024-06-21 21:43:40,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1055557477, now seen corresponding path program 1 times [2024-06-21 21:43:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916549627] [2024-06-21 21:43:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:40,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:41,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:41,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916549627] [2024-06-21 21:43:41,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916549627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:41,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:41,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:43:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691527998] [2024-06-21 21:43:41,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:41,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:43:41,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:41,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:43:41,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:43:41,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:41,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 304 transitions, 3392 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:41,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:41,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:41,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:42,186 INFO L124 PetriNetUnfolderBase]: 2177/3424 cut-off events. [2024-06-21 21:43:42,186 INFO L125 PetriNetUnfolderBase]: For 139379/139412 co-relation queries the response was YES. [2024-06-21 21:43:42,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22914 conditions, 3424 events. 2177/3424 cut-off events. For 139379/139412 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18333 event pairs, 404 based on Foata normal form. 6/3410 useless extension candidates. Maximal degree in co-relation 22810. Up to 3011 conditions per place. [2024-06-21 21:43:42,224 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 236 selfloop transitions, 74 changer transitions 0/335 dead transitions. [2024-06-21 21:43:42,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 335 transitions, 4238 flow [2024-06-21 21:43:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:43:42,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 21:43:42,225 INFO L175 Difference]: Start difference. First operand has 227 places, 304 transitions, 3392 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:43:42,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 335 transitions, 4238 flow [2024-06-21 21:43:42,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 335 transitions, 4148 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:42,457 INFO L231 Difference]: Finished difference. Result has 231 places, 308 transitions, 3515 flow [2024-06-21 21:43:42,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3515, PETRI_PLACES=231, PETRI_TRANSITIONS=308} [2024-06-21 21:43:42,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-21 21:43:42,458 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 308 transitions, 3515 flow [2024-06-21 21:43:42,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:42,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:42,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:42,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:43:42,459 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:42,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1055617927, now seen corresponding path program 2 times [2024-06-21 21:43:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822454061] [2024-06-21 21:43:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:43,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:43,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822454061] [2024-06-21 21:43:43,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822454061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:43,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:43,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:43:43,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938211996] [2024-06-21 21:43:43,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:43,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:43:43,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:43,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:43:43,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:43:43,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:43,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 308 transitions, 3515 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:43,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:43,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:43,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:44,256 INFO L124 PetriNetUnfolderBase]: 2189/3440 cut-off events. [2024-06-21 21:43:44,256 INFO L125 PetriNetUnfolderBase]: For 145720/145753 co-relation queries the response was YES. [2024-06-21 21:43:44,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23326 conditions, 3440 events. 2189/3440 cut-off events. For 145720/145753 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18424 event pairs, 445 based on Foata normal form. 6/3426 useless extension candidates. Maximal degree in co-relation 23221. Up to 3101 conditions per place. [2024-06-21 21:43:44,289 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 236 selfloop transitions, 71 changer transitions 0/332 dead transitions. [2024-06-21 21:43:44,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 332 transitions, 4227 flow [2024-06-21 21:43:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 21:43:44,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 21:43:44,291 INFO L175 Difference]: Start difference. First operand has 231 places, 308 transitions, 3515 flow. Second operand 9 states and 158 transitions. [2024-06-21 21:43:44,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 332 transitions, 4227 flow [2024-06-21 21:43:44,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 332 transitions, 4086 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:44,603 INFO L231 Difference]: Finished difference. Result has 235 places, 310 transitions, 3557 flow [2024-06-21 21:43:44,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3557, PETRI_PLACES=235, PETRI_TRANSITIONS=310} [2024-06-21 21:43:44,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 21:43:44,603 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 310 transitions, 3557 flow [2024-06-21 21:43:44,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:44,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:44,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:44,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:43:44,604 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:44,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:44,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1055618051, now seen corresponding path program 1 times [2024-06-21 21:43:44,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:44,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581078501] [2024-06-21 21:43:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:44,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:45,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:45,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581078501] [2024-06-21 21:43:45,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581078501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:45,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:45,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050526497] [2024-06-21 21:43:45,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:45,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:45,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:45,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:45,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 310 transitions, 3557 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:45,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:45,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:45,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:46,403 INFO L124 PetriNetUnfolderBase]: 2291/3569 cut-off events. [2024-06-21 21:43:46,403 INFO L125 PetriNetUnfolderBase]: For 151282/151282 co-relation queries the response was YES. [2024-06-21 21:43:46,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24330 conditions, 3569 events. 2291/3569 cut-off events. For 151282/151282 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19005 event pairs, 452 based on Foata normal form. 2/3570 useless extension candidates. Maximal degree in co-relation 24223. Up to 3313 conditions per place. [2024-06-21 21:43:46,439 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 287 selfloop transitions, 65 changer transitions 0/356 dead transitions. [2024-06-21 21:43:46,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 356 transitions, 4658 flow [2024-06-21 21:43:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:43:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:43:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 21:43:46,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-21 21:43:46,440 INFO L175 Difference]: Start difference. First operand has 235 places, 310 transitions, 3557 flow. Second operand 11 states and 186 transitions. [2024-06-21 21:43:46,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 356 transitions, 4658 flow [2024-06-21 21:43:46,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 356 transitions, 4488 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:46,733 INFO L231 Difference]: Finished difference. Result has 241 places, 325 transitions, 3746 flow [2024-06-21 21:43:46,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3746, PETRI_PLACES=241, PETRI_TRANSITIONS=325} [2024-06-21 21:43:46,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 21:43:46,734 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 325 transitions, 3746 flow [2024-06-21 21:43:46,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:46,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:46,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:46,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:43:46,734 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:46,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash -763334527, now seen corresponding path program 3 times [2024-06-21 21:43:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:46,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713091271] [2024-06-21 21:43:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:46,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:47,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:47,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713091271] [2024-06-21 21:43:47,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713091271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:47,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:47,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:47,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95752431] [2024-06-21 21:43:47,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:47,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:47,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:47,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:47,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:47,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:47,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 325 transitions, 3746 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:47,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:47,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:47,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:48,531 INFO L124 PetriNetUnfolderBase]: 2270/3562 cut-off events. [2024-06-21 21:43:48,531 INFO L125 PetriNetUnfolderBase]: For 173015/173048 co-relation queries the response was YES. [2024-06-21 21:43:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24625 conditions, 3562 events. 2270/3562 cut-off events. For 173015/173048 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19217 event pairs, 451 based on Foata normal form. 17/3559 useless extension candidates. Maximal degree in co-relation 24515. Up to 3111 conditions per place. [2024-06-21 21:43:48,568 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 232 selfloop transitions, 94 changer transitions 0/354 dead transitions. [2024-06-21 21:43:48,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 354 transitions, 4594 flow [2024-06-21 21:43:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:43:48,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 21:43:48,569 INFO L175 Difference]: Start difference. First operand has 241 places, 325 transitions, 3746 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:43:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 354 transitions, 4594 flow [2024-06-21 21:43:48,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 354 transitions, 4480 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:48,943 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 3945 flow [2024-06-21 21:43:48,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3945, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-21 21:43:48,944 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-21 21:43:48,944 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 3945 flow [2024-06-21 21:43:48,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:48,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:48,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:48,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:43:48,945 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:48,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1173705607, now seen corresponding path program 4 times [2024-06-21 21:43:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:48,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685505158] [2024-06-21 21:43:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:48,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:50,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:50,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685505158] [2024-06-21 21:43:50,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685505158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:50,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:50,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:43:50,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650020715] [2024-06-21 21:43:50,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:50,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:43:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:50,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:43:50,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:43:50,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:43:50,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 3945 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:50,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:50,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:43:50,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:51,043 INFO L124 PetriNetUnfolderBase]: 2328/3650 cut-off events. [2024-06-21 21:43:51,043 INFO L125 PetriNetUnfolderBase]: For 189314/189347 co-relation queries the response was YES. [2024-06-21 21:43:51,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25968 conditions, 3650 events. 2328/3650 cut-off events. For 189314/189347 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19744 event pairs, 459 based on Foata normal form. 17/3647 useless extension candidates. Maximal degree in co-relation 25855. Up to 3267 conditions per place. [2024-06-21 21:43:51,082 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 74 changer transitions 0/357 dead transitions. [2024-06-21 21:43:51,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 357 transitions, 4805 flow [2024-06-21 21:43:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:43:51,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:43:51,089 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 3945 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:43:51,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 357 transitions, 4805 flow [2024-06-21 21:43:51,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 357 transitions, 4631 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:51,516 INFO L231 Difference]: Finished difference. Result has 249 places, 337 transitions, 4055 flow [2024-06-21 21:43:51,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4055, PETRI_PLACES=249, PETRI_TRANSITIONS=337} [2024-06-21 21:43:51,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 21:43:51,517 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 337 transitions, 4055 flow [2024-06-21 21:43:51,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:51,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:51,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:51,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:43:51,518 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:51,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1173710381, now seen corresponding path program 2 times [2024-06-21 21:43:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:51,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101949592] [2024-06-21 21:43:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101949592] [2024-06-21 21:43:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101949592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046003742] [2024-06-21 21:43:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:52,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:52,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 337 transitions, 4055 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:52,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:52,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:52,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:53,424 INFO L124 PetriNetUnfolderBase]: 2415/3763 cut-off events. [2024-06-21 21:43:53,425 INFO L125 PetriNetUnfolderBase]: For 182528/182528 co-relation queries the response was YES. [2024-06-21 21:43:53,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27222 conditions, 3763 events. 2415/3763 cut-off events. For 182528/182528 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20280 event pairs, 467 based on Foata normal form. 2/3764 useless extension candidates. Maximal degree in co-relation 27107. Up to 3600 conditions per place. [2024-06-21 21:43:53,466 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 319 selfloop transitions, 37 changer transitions 0/360 dead transitions. [2024-06-21 21:43:53,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 360 transitions, 4888 flow [2024-06-21 21:43:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:43:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:43:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 21:43:53,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-21 21:43:53,467 INFO L175 Difference]: Start difference. First operand has 249 places, 337 transitions, 4055 flow. Second operand 10 states and 161 transitions. [2024-06-21 21:43:53,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 360 transitions, 4888 flow [2024-06-21 21:43:53,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 360 transitions, 4731 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:53,868 INFO L231 Difference]: Finished difference. Result has 253 places, 340 transitions, 4017 flow [2024-06-21 21:43:53,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4017, PETRI_PLACES=253, PETRI_TRANSITIONS=340} [2024-06-21 21:43:53,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 21:43:53,869 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 340 transitions, 4017 flow [2024-06-21 21:43:53,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:43:53,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:53,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:53,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:43:53,869 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:53,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:53,869 INFO L85 PathProgramCache]: Analyzing trace with hash -648043233, now seen corresponding path program 3 times [2024-06-21 21:43:53,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:53,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368682259] [2024-06-21 21:43:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:53,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:54,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:54,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368682259] [2024-06-21 21:43:54,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368682259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:54,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:54,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:43:54,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526614029] [2024-06-21 21:43:54,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:54,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:43:54,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:54,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:43:54,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:43:54,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:54,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 340 transitions, 4017 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:43:54,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:54,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:54,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:55,836 INFO L124 PetriNetUnfolderBase]: 2441/3799 cut-off events. [2024-06-21 21:43:55,837 INFO L125 PetriNetUnfolderBase]: For 184009/184009 co-relation queries the response was YES. [2024-06-21 21:43:55,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27477 conditions, 3799 events. 2441/3799 cut-off events. For 184009/184009 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20501 event pairs, 469 based on Foata normal form. 2/3800 useless extension candidates. Maximal degree in co-relation 27361. Up to 3610 conditions per place. [2024-06-21 21:43:55,883 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 316 selfloop transitions, 49 changer transitions 0/369 dead transitions. [2024-06-21 21:43:55,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 369 transitions, 5027 flow [2024-06-21 21:43:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:43:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:43:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 21:43:55,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-21 21:43:55,884 INFO L175 Difference]: Start difference. First operand has 253 places, 340 transitions, 4017 flow. Second operand 10 states and 166 transitions. [2024-06-21 21:43:55,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 369 transitions, 5027 flow [2024-06-21 21:43:56,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 369 transitions, 4946 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:56,347 INFO L231 Difference]: Finished difference. Result has 257 places, 347 transitions, 4145 flow [2024-06-21 21:43:56,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4145, PETRI_PLACES=257, PETRI_TRANSITIONS=347} [2024-06-21 21:43:56,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-21 21:43:56,348 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 347 transitions, 4145 flow [2024-06-21 21:43:56,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:43:56,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:56,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:56,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:43:56,349 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:56,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1173883361, now seen corresponding path program 4 times [2024-06-21 21:43:56,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:56,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219997669] [2024-06-21 21:43:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:56,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:57,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219997669] [2024-06-21 21:43:57,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219997669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:57,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:57,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:43:57,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247163313] [2024-06-21 21:43:57,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:57,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:43:57,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:57,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:43:57,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:43:57,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:57,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 347 transitions, 4145 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:43:57,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:57,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:57,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:58,451 INFO L124 PetriNetUnfolderBase]: 2435/3791 cut-off events. [2024-06-21 21:43:58,451 INFO L125 PetriNetUnfolderBase]: For 187913/187913 co-relation queries the response was YES. [2024-06-21 21:43:58,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27519 conditions, 3791 events. 2435/3791 cut-off events. For 187913/187913 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20456 event pairs, 466 based on Foata normal form. 2/3792 useless extension candidates. Maximal degree in co-relation 27401. Up to 3628 conditions per place. [2024-06-21 21:43:58,488 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 329 selfloop transitions, 37 changer transitions 0/370 dead transitions. [2024-06-21 21:43:58,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 370 transitions, 4983 flow [2024-06-21 21:43:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:43:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:43:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 21:43:58,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 21:43:58,490 INFO L175 Difference]: Start difference. First operand has 257 places, 347 transitions, 4145 flow. Second operand 11 states and 175 transitions. [2024-06-21 21:43:58,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 370 transitions, 4983 flow [2024-06-21 21:43:58,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 370 transitions, 4886 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:58,871 INFO L231 Difference]: Finished difference. Result has 262 places, 348 transitions, 4144 flow [2024-06-21 21:43:58,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4144, PETRI_PLACES=262, PETRI_TRANSITIONS=348} [2024-06-21 21:43:58,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-21 21:43:58,872 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 348 transitions, 4144 flow [2024-06-21 21:43:58,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:43:58,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:58,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:58,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:43:58,873 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:58,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:58,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1173890305, now seen corresponding path program 1 times [2024-06-21 21:43:58,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:58,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328541525] [2024-06-21 21:43:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:59,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:59,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328541525] [2024-06-21 21:43:59,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328541525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:59,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:59,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:43:59,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811769753] [2024-06-21 21:43:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:59,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:43:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:43:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:43:59,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:43:59,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 348 transitions, 4144 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:43:59,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:59,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:43:59,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:00,736 INFO L124 PetriNetUnfolderBase]: 2443/3803 cut-off events. [2024-06-21 21:44:00,736 INFO L125 PetriNetUnfolderBase]: For 194114/194114 co-relation queries the response was YES. [2024-06-21 21:44:00,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27742 conditions, 3803 events. 2443/3803 cut-off events. For 194114/194114 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20505 event pairs, 468 based on Foata normal form. 2/3804 useless extension candidates. Maximal degree in co-relation 27622. Up to 3659 conditions per place. [2024-06-21 21:44:00,780 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 336 selfloop transitions, 27 changer transitions 0/367 dead transitions. [2024-06-21 21:44:00,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 367 transitions, 4962 flow [2024-06-21 21:44:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:44:00,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 21:44:00,781 INFO L175 Difference]: Start difference. First operand has 262 places, 348 transitions, 4144 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:44:00,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 367 transitions, 4962 flow [2024-06-21 21:44:01,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 367 transitions, 4878 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 21:44:01,186 INFO L231 Difference]: Finished difference. Result has 261 places, 350 transitions, 4155 flow [2024-06-21 21:44:01,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4155, PETRI_PLACES=261, PETRI_TRANSITIONS=350} [2024-06-21 21:44:01,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-21 21:44:01,187 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 350 transitions, 4155 flow [2024-06-21 21:44:01,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:01,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:01,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:01,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:44:01,187 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:01,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2133467467, now seen corresponding path program 2 times [2024-06-21 21:44:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:01,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234747697] [2024-06-21 21:44:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:01,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:02,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234747697] [2024-06-21 21:44:02,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234747697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:02,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:02,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:02,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624280898] [2024-06-21 21:44:02,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:02,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:02,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:02,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:02,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:02,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:02,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 350 transitions, 4155 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:02,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:02,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:02,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:03,048 INFO L124 PetriNetUnfolderBase]: 2451/3815 cut-off events. [2024-06-21 21:44:03,048 INFO L125 PetriNetUnfolderBase]: For 200993/200993 co-relation queries the response was YES. [2024-06-21 21:44:03,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27895 conditions, 3815 events. 2451/3815 cut-off events. For 200993/200993 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20586 event pairs, 468 based on Foata normal form. 2/3816 useless extension candidates. Maximal degree in co-relation 27774. Up to 3665 conditions per place. [2024-06-21 21:44:03,092 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 335 selfloop transitions, 29 changer transitions 0/368 dead transitions. [2024-06-21 21:44:03,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 368 transitions, 4973 flow [2024-06-21 21:44:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:44:03,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:44:03,093 INFO L175 Difference]: Start difference. First operand has 261 places, 350 transitions, 4155 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:44:03,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 368 transitions, 4973 flow [2024-06-21 21:44:03,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 368 transitions, 4911 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:03,524 INFO L231 Difference]: Finished difference. Result has 263 places, 352 transitions, 4195 flow [2024-06-21 21:44:03,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4195, PETRI_PLACES=263, PETRI_TRANSITIONS=352} [2024-06-21 21:44:03,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-21 21:44:03,525 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 352 transitions, 4195 flow [2024-06-21 21:44:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:03,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:03,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:03,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:44:03,526 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:03,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:03,526 INFO L85 PathProgramCache]: Analyzing trace with hash -442568421, now seen corresponding path program 5 times [2024-06-21 21:44:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:03,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107912772] [2024-06-21 21:44:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:04,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:04,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107912772] [2024-06-21 21:44:04,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107912772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:04,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:04,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:04,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086492071] [2024-06-21 21:44:04,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:04,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:04,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:04,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 352 transitions, 4195 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:04,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:04,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:04,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:05,484 INFO L124 PetriNetUnfolderBase]: 2461/3829 cut-off events. [2024-06-21 21:44:05,484 INFO L125 PetriNetUnfolderBase]: For 208403/208403 co-relation queries the response was YES. [2024-06-21 21:44:05,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28237 conditions, 3829 events. 2461/3829 cut-off events. For 208403/208403 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20712 event pairs, 483 based on Foata normal form. 2/3830 useless extension candidates. Maximal degree in co-relation 28115. Up to 3658 conditions per place. [2024-06-21 21:44:05,528 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 335 selfloop transitions, 34 changer transitions 0/373 dead transitions. [2024-06-21 21:44:05,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 373 transitions, 5048 flow [2024-06-21 21:44:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:44:05,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 21:44:05,530 INFO L175 Difference]: Start difference. First operand has 263 places, 352 transitions, 4195 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:44:05,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 373 transitions, 5048 flow [2024-06-21 21:44:05,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 373 transitions, 4966 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:05,997 INFO L231 Difference]: Finished difference. Result has 266 places, 355 transitions, 4238 flow [2024-06-21 21:44:05,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4238, PETRI_PLACES=266, PETRI_TRANSITIONS=355} [2024-06-21 21:44:05,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-21 21:44:05,998 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 355 transitions, 4238 flow [2024-06-21 21:44:05,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:05,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:05,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:05,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:44:05,999 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:05,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash -442741401, now seen corresponding path program 6 times [2024-06-21 21:44:06,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:06,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884334458] [2024-06-21 21:44:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:06,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:07,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:07,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884334458] [2024-06-21 21:44:07,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884334458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:07,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:07,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:07,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364171670] [2024-06-21 21:44:07,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:07,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:07,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:07,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:07,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 355 transitions, 4238 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:07,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:07,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:07,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:07,987 INFO L124 PetriNetUnfolderBase]: 2471/3843 cut-off events. [2024-06-21 21:44:07,987 INFO L125 PetriNetUnfolderBase]: For 207925/207925 co-relation queries the response was YES. [2024-06-21 21:44:08,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28224 conditions, 3843 events. 2471/3843 cut-off events. For 207925/207925 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20775 event pairs, 479 based on Foata normal form. 2/3844 useless extension candidates. Maximal degree in co-relation 28101. Up to 3690 conditions per place. [2024-06-21 21:44:08,029 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 338 selfloop transitions, 35 changer transitions 0/377 dead transitions. [2024-06-21 21:44:08,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 377 transitions, 5144 flow [2024-06-21 21:44:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:44:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:44:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-21 21:44:08,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385 [2024-06-21 21:44:08,031 INFO L175 Difference]: Start difference. First operand has 266 places, 355 transitions, 4238 flow. Second operand 10 states and 154 transitions. [2024-06-21 21:44:08,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 377 transitions, 5144 flow [2024-06-21 21:44:08,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 377 transitions, 5062 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:08,626 INFO L231 Difference]: Finished difference. Result has 274 places, 362 transitions, 4378 flow [2024-06-21 21:44:08,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4378, PETRI_PLACES=274, PETRI_TRANSITIONS=362} [2024-06-21 21:44:08,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 21:44:08,626 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 362 transitions, 4378 flow [2024-06-21 21:44:08,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:08,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:08,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:08,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:44:08,627 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:08,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:08,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1339344865, now seen corresponding path program 7 times [2024-06-21 21:44:08,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:08,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196536846] [2024-06-21 21:44:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:08,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196536846] [2024-06-21 21:44:09,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196536846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:09,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:09,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147612688] [2024-06-21 21:44:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:09,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:09,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:09,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 362 transitions, 4378 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:09,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:09,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:09,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:10,612 INFO L124 PetriNetUnfolderBase]: 2481/3857 cut-off events. [2024-06-21 21:44:10,612 INFO L125 PetriNetUnfolderBase]: For 215158/215158 co-relation queries the response was YES. [2024-06-21 21:44:10,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28531 conditions, 3857 events. 2481/3857 cut-off events. For 215158/215158 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20866 event pairs, 479 based on Foata normal form. 2/3858 useless extension candidates. Maximal degree in co-relation 28404. Up to 3634 conditions per place. [2024-06-21 21:44:10,759 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 331 selfloop transitions, 63 changer transitions 0/398 dead transitions. [2024-06-21 21:44:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 398 transitions, 5633 flow [2024-06-21 21:44:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:44:10,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:44:10,763 INFO L175 Difference]: Start difference. First operand has 274 places, 362 transitions, 4378 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:44:10,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 398 transitions, 5633 flow [2024-06-21 21:44:11,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 398 transitions, 5541 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:11,183 INFO L231 Difference]: Finished difference. Result has 279 places, 372 transitions, 4629 flow [2024-06-21 21:44:11,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4629, PETRI_PLACES=279, PETRI_TRANSITIONS=372} [2024-06-21 21:44:11,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-21 21:44:11,184 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 372 transitions, 4629 flow [2024-06-21 21:44:11,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:11,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:11,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:11,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:44:11,184 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:11,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:11,185 INFO L85 PathProgramCache]: Analyzing trace with hash -442746175, now seen corresponding path program 5 times [2024-06-21 21:44:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:11,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22689306] [2024-06-21 21:44:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:12,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:12,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22689306] [2024-06-21 21:44:12,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22689306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:12,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:12,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:12,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164736952] [2024-06-21 21:44:12,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:12,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:12,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:12,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:12,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:44:12,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 372 transitions, 4629 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:12,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:12,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:44:12,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:13,327 INFO L124 PetriNetUnfolderBase]: 2432/3806 cut-off events. [2024-06-21 21:44:13,327 INFO L125 PetriNetUnfolderBase]: For 237237/237270 co-relation queries the response was YES. [2024-06-21 21:44:13,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28557 conditions, 3806 events. 2432/3806 cut-off events. For 237237/237270 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20692 event pairs, 429 based on Foata normal form. 17/3803 useless extension candidates. Maximal degree in co-relation 28427. Up to 3100 conditions per place. [2024-06-21 21:44:13,369 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 281 selfloop transitions, 82 changer transitions 0/405 dead transitions. [2024-06-21 21:44:13,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 405 transitions, 5586 flow [2024-06-21 21:44:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 21:44:13,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-21 21:44:13,370 INFO L175 Difference]: Start difference. First operand has 279 places, 372 transitions, 4629 flow. Second operand 8 states and 156 transitions. [2024-06-21 21:44:13,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 405 transitions, 5586 flow [2024-06-21 21:44:13,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 405 transitions, 5413 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:13,896 INFO L231 Difference]: Finished difference. Result has 282 places, 376 transitions, 4759 flow [2024-06-21 21:44:13,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4759, PETRI_PLACES=282, PETRI_TRANSITIONS=376} [2024-06-21 21:44:13,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-21 21:44:13,897 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 376 transitions, 4759 flow [2024-06-21 21:44:13,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:13,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:13,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:13,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:44:13,898 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:13,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash -214660327, now seen corresponding path program 3 times [2024-06-21 21:44:13,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:13,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522389581] [2024-06-21 21:44:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:13,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522389581] [2024-06-21 21:44:14,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522389581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:14,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:14,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943182924] [2024-06-21 21:44:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:14,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:14,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 376 transitions, 4759 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:14,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:14,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:15,849 INFO L124 PetriNetUnfolderBase]: 2520/3918 cut-off events. [2024-06-21 21:44:15,849 INFO L125 PetriNetUnfolderBase]: For 235354/235354 co-relation queries the response was YES. [2024-06-21 21:44:15,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30013 conditions, 3918 events. 2520/3918 cut-off events. For 235354/235354 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21263 event pairs, 494 based on Foata normal form. 2/3919 useless extension candidates. Maximal degree in co-relation 29882. Up to 3801 conditions per place. [2024-06-21 21:44:15,901 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 369 selfloop transitions, 16 changer transitions 0/389 dead transitions. [2024-06-21 21:44:15,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 389 transitions, 5593 flow [2024-06-21 21:44:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:44:15,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 21:44:15,902 INFO L175 Difference]: Start difference. First operand has 282 places, 376 transitions, 4759 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:44:15,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 389 transitions, 5593 flow [2024-06-21 21:44:16,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 389 transitions, 5439 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:16,475 INFO L231 Difference]: Finished difference. Result has 284 places, 378 transitions, 4678 flow [2024-06-21 21:44:16,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4678, PETRI_PLACES=284, PETRI_TRANSITIONS=378} [2024-06-21 21:44:16,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-21 21:44:16,476 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 378 transitions, 4678 flow [2024-06-21 21:44:16,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:16,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:16,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:16,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:44:16,477 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:16,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 433623271, now seen corresponding path program 1 times [2024-06-21 21:44:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:16,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003982565] [2024-06-21 21:44:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:17,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:17,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003982565] [2024-06-21 21:44:17,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003982565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:17,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:17,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:17,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623560605] [2024-06-21 21:44:17,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:17,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:17,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:17,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:17,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:17,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 378 transitions, 4678 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:17,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:17,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:17,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:18,317 INFO L124 PetriNetUnfolderBase]: 2517/3914 cut-off events. [2024-06-21 21:44:18,317 INFO L125 PetriNetUnfolderBase]: For 230945/230945 co-relation queries the response was YES. [2024-06-21 21:44:18,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29836 conditions, 3914 events. 2517/3914 cut-off events. For 230945/230945 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21181 event pairs, 491 based on Foata normal form. 1/3914 useless extension candidates. Maximal degree in co-relation 29704. Up to 3786 conditions per place. [2024-06-21 21:44:18,358 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 360 selfloop transitions, 25 changer transitions 0/389 dead transitions. [2024-06-21 21:44:18,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 389 transitions, 5484 flow [2024-06-21 21:44:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 21:44:18,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:44:18,360 INFO L175 Difference]: Start difference. First operand has 284 places, 378 transitions, 4678 flow. Second operand 7 states and 115 transitions. [2024-06-21 21:44:18,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 389 transitions, 5484 flow [2024-06-21 21:44:18,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 389 transitions, 5409 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:18,944 INFO L231 Difference]: Finished difference. Result has 286 places, 378 transitions, 4663 flow [2024-06-21 21:44:18,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4603, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4663, PETRI_PLACES=286, PETRI_TRANSITIONS=378} [2024-06-21 21:44:18,945 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-21 21:44:18,945 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 378 transitions, 4663 flow [2024-06-21 21:44:18,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:18,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:18,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:18,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:44:18,945 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:18,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash -206386117, now seen corresponding path program 4 times [2024-06-21 21:44:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:18,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28117447] [2024-06-21 21:44:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:18,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:19,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:19,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28117447] [2024-06-21 21:44:19,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28117447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:19,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:19,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:19,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366315802] [2024-06-21 21:44:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:19,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:19,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:19,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 378 transitions, 4663 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:19,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:19,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:19,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:20,779 INFO L124 PetriNetUnfolderBase]: 2525/3926 cut-off events. [2024-06-21 21:44:20,779 INFO L125 PetriNetUnfolderBase]: For 239502/239502 co-relation queries the response was YES. [2024-06-21 21:44:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30003 conditions, 3926 events. 2525/3926 cut-off events. For 239502/239502 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21267 event pairs, 495 based on Foata normal form. 2/3927 useless extension candidates. Maximal degree in co-relation 29870. Up to 3797 conditions per place. [2024-06-21 21:44:20,821 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 364 selfloop transitions, 23 changer transitions 0/391 dead transitions. [2024-06-21 21:44:20,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 391 transitions, 5505 flow [2024-06-21 21:44:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:44:20,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 21:44:20,822 INFO L175 Difference]: Start difference. First operand has 286 places, 378 transitions, 4663 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:44:20,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 391 transitions, 5505 flow [2024-06-21 21:44:21,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 391 transitions, 5437 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:21,360 INFO L231 Difference]: Finished difference. Result has 287 places, 380 transitions, 4689 flow [2024-06-21 21:44:21,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4689, PETRI_PLACES=287, PETRI_TRANSITIONS=380} [2024-06-21 21:44:21,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-21 21:44:21,361 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 380 transitions, 4689 flow [2024-06-21 21:44:21,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:21,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:21,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:21,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:44:21,361 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:21,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:21,361 INFO L85 PathProgramCache]: Analyzing trace with hash -206089447, now seen corresponding path program 5 times [2024-06-21 21:44:21,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:21,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778528428] [2024-06-21 21:44:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:21,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:22,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:22,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778528428] [2024-06-21 21:44:22,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778528428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:22,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:22,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:22,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578397329] [2024-06-21 21:44:22,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:22,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:22,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:22,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:22,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:22,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 380 transitions, 4689 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:22,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:22,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:22,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:23,213 INFO L124 PetriNetUnfolderBase]: 2520/3919 cut-off events. [2024-06-21 21:44:23,213 INFO L125 PetriNetUnfolderBase]: For 243441/243441 co-relation queries the response was YES. [2024-06-21 21:44:23,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30072 conditions, 3919 events. 2520/3919 cut-off events. For 243441/243441 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21230 event pairs, 488 based on Foata normal form. 2/3920 useless extension candidates. Maximal degree in co-relation 29938. Up to 3797 conditions per place. [2024-06-21 21:44:23,251 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 372 selfloop transitions, 17 changer transitions 0/393 dead transitions. [2024-06-21 21:44:23,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 393 transitions, 5535 flow [2024-06-21 21:44:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:44:23,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 21:44:23,252 INFO L175 Difference]: Start difference. First operand has 287 places, 380 transitions, 4689 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:44:23,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 393 transitions, 5535 flow [2024-06-21 21:44:23,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 393 transitions, 5457 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:23,837 INFO L231 Difference]: Finished difference. Result has 289 places, 382 transitions, 4694 flow [2024-06-21 21:44:23,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4694, PETRI_PLACES=289, PETRI_TRANSITIONS=382} [2024-06-21 21:44:23,838 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 21:44:23,838 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 382 transitions, 4694 flow [2024-06-21 21:44:23,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:23,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:23,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:44:23,838 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:23,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -214667271, now seen corresponding path program 8 times [2024-06-21 21:44:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463385777] [2024-06-21 21:44:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:24,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:24,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463385777] [2024-06-21 21:44:24,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463385777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:24,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:24,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:24,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72861135] [2024-06-21 21:44:24,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:24,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:24,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:24,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:24,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:24,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 382 transitions, 4694 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:24,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:24,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:24,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:25,763 INFO L124 PetriNetUnfolderBase]: 2514/3911 cut-off events. [2024-06-21 21:44:25,763 INFO L125 PetriNetUnfolderBase]: For 239525/239525 co-relation queries the response was YES. [2024-06-21 21:44:25,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29815 conditions, 3911 events. 2514/3911 cut-off events. For 239525/239525 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21198 event pairs, 491 based on Foata normal form. 2/3912 useless extension candidates. Maximal degree in co-relation 29680. Up to 3784 conditions per place. [2024-06-21 21:44:25,811 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 372 selfloop transitions, 20 changer transitions 0/396 dead transitions. [2024-06-21 21:44:25,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 396 transitions, 5540 flow [2024-06-21 21:44:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:44:25,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:44:25,812 INFO L175 Difference]: Start difference. First operand has 289 places, 382 transitions, 4694 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:44:25,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 396 transitions, 5540 flow [2024-06-21 21:44:26,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 396 transitions, 5461 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:26,520 INFO L231 Difference]: Finished difference. Result has 292 places, 383 transitions, 4681 flow [2024-06-21 21:44:26,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4681, PETRI_PLACES=292, PETRI_TRANSITIONS=383} [2024-06-21 21:44:26,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-21 21:44:26,521 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 383 transitions, 4681 flow [2024-06-21 21:44:26,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:26,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:26,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:26,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:44:26,521 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:26,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1221888491, now seen corresponding path program 1 times [2024-06-21 21:44:26,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:26,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733562960] [2024-06-21 21:44:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:27,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:27,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733562960] [2024-06-21 21:44:27,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733562960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:27,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:27,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860747029] [2024-06-21 21:44:27,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:27,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:27,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:27,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 383 transitions, 4681 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:27,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:27,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:27,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:28,557 INFO L124 PetriNetUnfolderBase]: 2519/3918 cut-off events. [2024-06-21 21:44:28,558 INFO L125 PetriNetUnfolderBase]: For 246041/246041 co-relation queries the response was YES. [2024-06-21 21:44:28,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29937 conditions, 3918 events. 2519/3918 cut-off events. For 246041/246041 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21269 event pairs, 496 based on Foata normal form. 1/3918 useless extension candidates. Maximal degree in co-relation 29801. Up to 3490 conditions per place. [2024-06-21 21:44:28,718 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 289 selfloop transitions, 112 changer transitions 0/405 dead transitions. [2024-06-21 21:44:28,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 405 transitions, 5785 flow [2024-06-21 21:44:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:44:28,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 21:44:28,719 INFO L175 Difference]: Start difference. First operand has 292 places, 383 transitions, 4681 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:44:28,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 405 transitions, 5785 flow [2024-06-21 21:44:29,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 405 transitions, 5725 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:29,125 INFO L231 Difference]: Finished difference. Result has 293 places, 389 transitions, 5000 flow [2024-06-21 21:44:29,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5000, PETRI_PLACES=293, PETRI_TRANSITIONS=389} [2024-06-21 21:44:29,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 21:44:29,126 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 389 transitions, 5000 flow [2024-06-21 21:44:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:29,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:29,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:29,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:44:29,126 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:29,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1194183961, now seen corresponding path program 2 times [2024-06-21 21:44:29,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:29,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90673554] [2024-06-21 21:44:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:30,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:30,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90673554] [2024-06-21 21:44:30,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90673554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:30,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:30,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:30,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924323529] [2024-06-21 21:44:30,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:30,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:30,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:30,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:30,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:30,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:30,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 389 transitions, 5000 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:30,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:30,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:30,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:31,183 INFO L124 PetriNetUnfolderBase]: 2534/3939 cut-off events. [2024-06-21 21:44:31,184 INFO L125 PetriNetUnfolderBase]: For 256183/256183 co-relation queries the response was YES. [2024-06-21 21:44:31,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30691 conditions, 3939 events. 2534/3939 cut-off events. For 256183/256183 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21394 event pairs, 494 based on Foata normal form. 1/3939 useless extension candidates. Maximal degree in co-relation 30554. Up to 3610 conditions per place. [2024-06-21 21:44:31,234 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 312 selfloop transitions, 94 changer transitions 0/410 dead transitions. [2024-06-21 21:44:31,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 410 transitions, 5986 flow [2024-06-21 21:44:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:44:31,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:44:31,235 INFO L175 Difference]: Start difference. First operand has 293 places, 389 transitions, 5000 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:44:31,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 410 transitions, 5986 flow [2024-06-21 21:44:31,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 410 transitions, 5832 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 21:44:31,801 INFO L231 Difference]: Finished difference. Result has 296 places, 398 transitions, 5201 flow [2024-06-21 21:44:31,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5201, PETRI_PLACES=296, PETRI_TRANSITIONS=398} [2024-06-21 21:44:31,801 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-21 21:44:31,801 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 398 transitions, 5201 flow [2024-06-21 21:44:31,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:31,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:31,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:31,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:44:31,802 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:31,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash 189821551, now seen corresponding path program 1 times [2024-06-21 21:44:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:31,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263024936] [2024-06-21 21:44:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:31,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:32,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263024936] [2024-06-21 21:44:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263024936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:32,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:32,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822363678] [2024-06-21 21:44:32,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:32,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:32,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:32,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 398 transitions, 5201 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:32,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:32,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:32,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:33,790 INFO L124 PetriNetUnfolderBase]: 2560/3977 cut-off events. [2024-06-21 21:44:33,790 INFO L125 PetriNetUnfolderBase]: For 261827/261827 co-relation queries the response was YES. [2024-06-21 21:44:33,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31335 conditions, 3977 events. 2560/3977 cut-off events. For 261827/261827 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21571 event pairs, 471 based on Foata normal form. 2/3978 useless extension candidates. Maximal degree in co-relation 31197. Up to 3608 conditions per place. [2024-06-21 21:44:33,838 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 94 changer transitions 0/428 dead transitions. [2024-06-21 21:44:33,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 428 transitions, 6429 flow [2024-06-21 21:44:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:44:33,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 21:44:33,840 INFO L175 Difference]: Start difference. First operand has 296 places, 398 transitions, 5201 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:44:33,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 428 transitions, 6429 flow [2024-06-21 21:44:34,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 428 transitions, 6204 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:34,581 INFO L231 Difference]: Finished difference. Result has 300 places, 407 transitions, 5360 flow [2024-06-21 21:44:34,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4978, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5360, PETRI_PLACES=300, PETRI_TRANSITIONS=407} [2024-06-21 21:44:34,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-21 21:44:34,582 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 407 transitions, 5360 flow [2024-06-21 21:44:34,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:34,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:34,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:34,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:44:34,583 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:34,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:34,583 INFO L85 PathProgramCache]: Analyzing trace with hash -70971107, now seen corresponding path program 2 times [2024-06-21 21:44:34,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:34,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614362155] [2024-06-21 21:44:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:34,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:35,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:35,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614362155] [2024-06-21 21:44:35,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614362155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:35,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:35,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524962989] [2024-06-21 21:44:35,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:35,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:35,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:35,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 407 transitions, 5360 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:35,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:35,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:35,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:36,530 INFO L124 PetriNetUnfolderBase]: 2570/3991 cut-off events. [2024-06-21 21:44:36,530 INFO L125 PetriNetUnfolderBase]: For 264914/264914 co-relation queries the response was YES. [2024-06-21 21:44:36,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31975 conditions, 3991 events. 2570/3991 cut-off events. For 264914/264914 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 21638 event pairs, 471 based on Foata normal form. 2/3992 useless extension candidates. Maximal degree in co-relation 31836. Up to 3618 conditions per place. [2024-06-21 21:44:36,583 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 328 selfloop transitions, 98 changer transitions 0/430 dead transitions. [2024-06-21 21:44:36,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 430 transitions, 6514 flow [2024-06-21 21:44:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:44:36,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:44:36,585 INFO L175 Difference]: Start difference. First operand has 300 places, 407 transitions, 5360 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:44:36,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 430 transitions, 6514 flow [2024-06-21 21:44:37,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 430 transitions, 6412 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 21:44:37,184 INFO L231 Difference]: Finished difference. Result has 304 places, 410 transitions, 5556 flow [2024-06-21 21:44:37,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5258, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5556, PETRI_PLACES=304, PETRI_TRANSITIONS=410} [2024-06-21 21:44:37,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 21:44:37,185 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 410 transitions, 5556 flow [2024-06-21 21:44:37,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:37,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:37,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:37,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:44:37,185 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:37,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash -77883797, now seen corresponding path program 3 times [2024-06-21 21:44:37,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:37,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278171792] [2024-06-21 21:44:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:37,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278171792] [2024-06-21 21:44:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278171792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:38,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:38,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534123349] [2024-06-21 21:44:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:38,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:38,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:38,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 410 transitions, 5556 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:38,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:38,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:38,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:39,020 INFO L124 PetriNetUnfolderBase]: 2564/3981 cut-off events. [2024-06-21 21:44:39,020 INFO L125 PetriNetUnfolderBase]: For 268616/268616 co-relation queries the response was YES. [2024-06-21 21:44:39,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32164 conditions, 3981 events. 2564/3981 cut-off events. For 268616/268616 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21576 event pairs, 486 based on Foata normal form. 2/3982 useless extension candidates. Maximal degree in co-relation 32023. Up to 3764 conditions per place. [2024-06-21 21:44:39,067 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 373 selfloop transitions, 43 changer transitions 0/420 dead transitions. [2024-06-21 21:44:39,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 420 transitions, 6432 flow [2024-06-21 21:44:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:44:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:44:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:44:39,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:44:39,068 INFO L175 Difference]: Start difference. First operand has 304 places, 410 transitions, 5556 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:44:39,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 420 transitions, 6432 flow [2024-06-21 21:44:39,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 420 transitions, 6213 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:39,763 INFO L231 Difference]: Finished difference. Result has 304 places, 410 transitions, 5437 flow [2024-06-21 21:44:39,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5437, PETRI_PLACES=304, PETRI_TRANSITIONS=410} [2024-06-21 21:44:39,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 21:44:39,763 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 410 transitions, 5437 flow [2024-06-21 21:44:39,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:39,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:39,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:39,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:44:39,764 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:39,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -78121133, now seen corresponding path program 3 times [2024-06-21 21:44:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:39,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061969075] [2024-06-21 21:44:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:40,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061969075] [2024-06-21 21:44:40,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061969075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:40,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:40,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:40,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526740021] [2024-06-21 21:44:40,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:40,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:40,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 410 transitions, 5437 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:40,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:40,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:40,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:41,939 INFO L124 PetriNetUnfolderBase]: 2625/4075 cut-off events. [2024-06-21 21:44:41,939 INFO L125 PetriNetUnfolderBase]: For 259596/259596 co-relation queries the response was YES. [2024-06-21 21:44:41,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32548 conditions, 4075 events. 2625/4075 cut-off events. For 259596/259596 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22097 event pairs, 482 based on Foata normal form. 1/4075 useless extension candidates. Maximal degree in co-relation 32408. Up to 3858 conditions per place. [2024-06-21 21:44:41,984 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 392 selfloop transitions, 65 changer transitions 0/461 dead transitions. [2024-06-21 21:44:41,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 461 transitions, 6933 flow [2024-06-21 21:44:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:44:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:44:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 21:44:41,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 21:44:41,985 INFO L175 Difference]: Start difference. First operand has 304 places, 410 transitions, 5437 flow. Second operand 10 states and 162 transitions. [2024-06-21 21:44:41,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 461 transitions, 6933 flow [2024-06-21 21:44:42,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 461 transitions, 6787 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:42,656 INFO L231 Difference]: Finished difference. Result has 311 places, 442 transitions, 6006 flow [2024-06-21 21:44:42,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6006, PETRI_PLACES=311, PETRI_TRANSITIONS=442} [2024-06-21 21:44:42,657 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 21:44:42,657 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 442 transitions, 6006 flow [2024-06-21 21:44:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:42,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:42,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:44:42,657 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:42,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 571621221, now seen corresponding path program 1 times [2024-06-21 21:44:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694485849] [2024-06-21 21:44:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694485849] [2024-06-21 21:44:43,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694485849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:43,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:43,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:43,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408947961] [2024-06-21 21:44:43,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:43,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:43,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:43,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:43,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 442 transitions, 6006 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:43,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:43,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:43,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:44,494 INFO L124 PetriNetUnfolderBase]: 2740/4249 cut-off events. [2024-06-21 21:44:44,494 INFO L125 PetriNetUnfolderBase]: For 275161/275167 co-relation queries the response was YES. [2024-06-21 21:44:44,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34289 conditions, 4249 events. 2740/4249 cut-off events. For 275161/275167 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23140 event pairs, 452 based on Foata normal form. 10/4258 useless extension candidates. Maximal degree in co-relation 34146. Up to 3780 conditions per place. [2024-06-21 21:44:44,555 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 386 selfloop transitions, 113 changer transitions 0/503 dead transitions. [2024-06-21 21:44:44,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 503 transitions, 7798 flow [2024-06-21 21:44:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:44:44,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:44:44,556 INFO L175 Difference]: Start difference. First operand has 311 places, 442 transitions, 6006 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:44:44,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 503 transitions, 7798 flow [2024-06-21 21:44:45,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 503 transitions, 7639 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-21 21:44:45,333 INFO L231 Difference]: Finished difference. Result has 320 places, 467 transitions, 6630 flow [2024-06-21 21:44:45,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6630, PETRI_PLACES=320, PETRI_TRANSITIONS=467} [2024-06-21 21:44:45,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-21 21:44:45,334 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 467 transitions, 6630 flow [2024-06-21 21:44:45,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:45,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:45,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:45,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:44:45,334 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:45,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:45,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1472998501, now seen corresponding path program 2 times [2024-06-21 21:44:45,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:45,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772905617] [2024-06-21 21:44:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:45,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:46,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:46,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772905617] [2024-06-21 21:44:46,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772905617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:46,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:46,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:44:46,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190243309] [2024-06-21 21:44:46,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:46,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:44:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:46,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:44:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:44:46,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:46,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 467 transitions, 6630 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:46,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:46,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:46,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:47,484 INFO L124 PetriNetUnfolderBase]: 2792/4325 cut-off events. [2024-06-21 21:44:47,484 INFO L125 PetriNetUnfolderBase]: For 297183/297189 co-relation queries the response was YES. [2024-06-21 21:44:47,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36014 conditions, 4325 events. 2792/4325 cut-off events. For 297183/297189 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23579 event pairs, 458 based on Foata normal form. 10/4334 useless extension candidates. Maximal degree in co-relation 35867. Up to 3964 conditions per place. [2024-06-21 21:44:47,540 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 415 selfloop transitions, 86 changer transitions 0/505 dead transitions. [2024-06-21 21:44:47,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 505 transitions, 8110 flow [2024-06-21 21:44:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:44:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:44:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 21:44:47,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-21 21:44:47,541 INFO L175 Difference]: Start difference. First operand has 320 places, 467 transitions, 6630 flow. Second operand 11 states and 188 transitions. [2024-06-21 21:44:47,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 505 transitions, 8110 flow [2024-06-21 21:44:48,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 505 transitions, 7929 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:48,452 INFO L231 Difference]: Finished difference. Result has 327 places, 475 transitions, 6836 flow [2024-06-21 21:44:48,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6836, PETRI_PLACES=327, PETRI_TRANSITIONS=475} [2024-06-21 21:44:48,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-21 21:44:48,452 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 475 transitions, 6836 flow [2024-06-21 21:44:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:44:48,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:48,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:44:48,453 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:48,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1583210033, now seen corresponding path program 3 times [2024-06-21 21:44:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131009706] [2024-06-21 21:44:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:49,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:49,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131009706] [2024-06-21 21:44:49,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131009706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:49,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:49,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583856533] [2024-06-21 21:44:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:49,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:49,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:49,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 475 transitions, 6836 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:49,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:49,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:49,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:50,530 INFO L124 PetriNetUnfolderBase]: 2949/4562 cut-off events. [2024-06-21 21:44:50,530 INFO L125 PetriNetUnfolderBase]: For 301386/301388 co-relation queries the response was YES. [2024-06-21 21:44:50,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38138 conditions, 4562 events. 2949/4562 cut-off events. For 301386/301388 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25041 event pairs, 493 based on Foata normal form. 6/4567 useless extension candidates. Maximal degree in co-relation 37989. Up to 4255 conditions per place. [2024-06-21 21:44:50,591 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 482 selfloop transitions, 59 changer transitions 0/545 dead transitions. [2024-06-21 21:44:50,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 545 transitions, 8924 flow [2024-06-21 21:44:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:44:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:44:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 21:44:50,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-21 21:44:50,592 INFO L175 Difference]: Start difference. First operand has 327 places, 475 transitions, 6836 flow. Second operand 11 states and 183 transitions. [2024-06-21 21:44:50,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 545 transitions, 8924 flow [2024-06-21 21:44:51,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 545 transitions, 8753 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:51,507 INFO L231 Difference]: Finished difference. Result has 337 places, 509 transitions, 7631 flow [2024-06-21 21:44:51,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6731, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7631, PETRI_PLACES=337, PETRI_TRANSITIONS=509} [2024-06-21 21:44:51,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 21:44:51,508 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 509 transitions, 7631 flow [2024-06-21 21:44:51,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:51,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:51,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:51,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:44:51,509 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:51,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1216783090, now seen corresponding path program 1 times [2024-06-21 21:44:51,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:51,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695635732] [2024-06-21 21:44:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:51,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:52,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695635732] [2024-06-21 21:44:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695635732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:52,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:52,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089971214] [2024-06-21 21:44:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:52,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:52,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 509 transitions, 7631 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:52,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:52,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:52,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:53,493 INFO L124 PetriNetUnfolderBase]: 2959/4567 cut-off events. [2024-06-21 21:44:53,493 INFO L125 PetriNetUnfolderBase]: For 297730/297730 co-relation queries the response was YES. [2024-06-21 21:44:53,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38382 conditions, 4567 events. 2959/4567 cut-off events. For 297730/297730 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25002 event pairs, 521 based on Foata normal form. 2/4568 useless extension candidates. Maximal degree in co-relation 38228. Up to 4246 conditions per place. [2024-06-21 21:44:53,550 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 443 selfloop transitions, 76 changer transitions 0/523 dead transitions. [2024-06-21 21:44:53,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 523 transitions, 8803 flow [2024-06-21 21:44:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:44:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:44:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 21:44:53,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-21 21:44:53,552 INFO L175 Difference]: Start difference. First operand has 337 places, 509 transitions, 7631 flow. Second operand 6 states and 107 transitions. [2024-06-21 21:44:53,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 523 transitions, 8803 flow [2024-06-21 21:44:54,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 523 transitions, 8621 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:54,569 INFO L231 Difference]: Finished difference. Result has 337 places, 512 transitions, 7709 flow [2024-06-21 21:44:54,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7709, PETRI_PLACES=337, PETRI_TRANSITIONS=512} [2024-06-21 21:44:54,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 21:44:54,570 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 512 transitions, 7709 flow [2024-06-21 21:44:54,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:54,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:54,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:54,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:44:54,571 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:54,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1282032125, now seen corresponding path program 4 times [2024-06-21 21:44:54,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:54,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337067883] [2024-06-21 21:44:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:55,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:55,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337067883] [2024-06-21 21:44:55,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337067883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:55,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:55,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:55,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80048166] [2024-06-21 21:44:55,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:55,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:55,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:55,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:55,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:55,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:55,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 512 transitions, 7709 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:55,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:55,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:55,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:56,928 INFO L124 PetriNetUnfolderBase]: 3011/4649 cut-off events. [2024-06-21 21:44:56,928 INFO L125 PetriNetUnfolderBase]: For 319957/319963 co-relation queries the response was YES. [2024-06-21 21:44:56,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39619 conditions, 4649 events. 3011/4649 cut-off events. For 319957/319963 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25581 event pairs, 504 based on Foata normal form. 10/4658 useless extension candidates. Maximal degree in co-relation 39465. Up to 4154 conditions per place. [2024-06-21 21:44:56,986 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 446 selfloop transitions, 96 changer transitions 0/546 dead transitions. [2024-06-21 21:44:56,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 546 transitions, 9375 flow [2024-06-21 21:44:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:44:56,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:44:56,987 INFO L175 Difference]: Start difference. First operand has 337 places, 512 transitions, 7709 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:44:56,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 546 transitions, 9375 flow [2024-06-21 21:44:57,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 546 transitions, 9185 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:57,831 INFO L231 Difference]: Finished difference. Result has 341 places, 520 transitions, 7958 flow [2024-06-21 21:44:57,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7523, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7958, PETRI_PLACES=341, PETRI_TRANSITIONS=520} [2024-06-21 21:44:57,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 21:44:57,832 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 520 transitions, 7958 flow [2024-06-21 21:44:57,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:57,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:57,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:57,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:44:57,833 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:57,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -898160941, now seen corresponding path program 5 times [2024-06-21 21:44:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:57,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794958539] [2024-06-21 21:44:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:58,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:58,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794958539] [2024-06-21 21:44:58,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794958539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:58,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:58,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700231619] [2024-06-21 21:44:58,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:58,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:58,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:58,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:44:58,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 520 transitions, 7958 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:44:58,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:58,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:44:58,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:59,734 INFO L124 PetriNetUnfolderBase]: 2999/4619 cut-off events. [2024-06-21 21:44:59,734 INFO L125 PetriNetUnfolderBase]: For 313023/313029 co-relation queries the response was YES. [2024-06-21 21:44:59,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39394 conditions, 4619 events. 2999/4619 cut-off events. For 313023/313029 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25279 event pairs, 496 based on Foata normal form. 10/4628 useless extension candidates. Maximal degree in co-relation 39239. Up to 4376 conditions per place. [2024-06-21 21:44:59,802 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 485 selfloop transitions, 45 changer transitions 0/534 dead transitions. [2024-06-21 21:44:59,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 534 transitions, 9092 flow [2024-06-21 21:44:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:44:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:44:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:44:59,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:44:59,803 INFO L175 Difference]: Start difference. First operand has 341 places, 520 transitions, 7958 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:44:59,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 534 transitions, 9092 flow [2024-06-21 21:45:00,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 534 transitions, 8896 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:00,972 INFO L231 Difference]: Finished difference. Result has 343 places, 520 transitions, 7863 flow [2024-06-21 21:45:00,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7863, PETRI_PLACES=343, PETRI_TRANSITIONS=520} [2024-06-21 21:45:00,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-21 21:45:00,973 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 520 transitions, 7863 flow [2024-06-21 21:45:00,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:00,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:00,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:00,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:45:00,973 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:00,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash -905668273, now seen corresponding path program 4 times [2024-06-21 21:45:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:00,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771033293] [2024-06-21 21:45:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:00,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:01,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771033293] [2024-06-21 21:45:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771033293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:01,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:01,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137803571] [2024-06-21 21:45:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:01,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:01,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 520 transitions, 7863 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:01,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:01,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:01,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:02,995 INFO L124 PetriNetUnfolderBase]: 2996/4612 cut-off events. [2024-06-21 21:45:02,995 INFO L125 PetriNetUnfolderBase]: For 303857/303857 co-relation queries the response was YES. [2024-06-21 21:45:03,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38956 conditions, 4612 events. 2996/4612 cut-off events. For 303857/303857 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25167 event pairs, 527 based on Foata normal form. 1/4612 useless extension candidates. Maximal degree in co-relation 38801. Up to 4129 conditions per place. [2024-06-21 21:45:03,058 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 396 selfloop transitions, 134 changer transitions 0/534 dead transitions. [2024-06-21 21:45:03,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 534 transitions, 8965 flow [2024-06-21 21:45:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:45:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:45:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:45:03,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-21 21:45:03,059 INFO L175 Difference]: Start difference. First operand has 343 places, 520 transitions, 7863 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:45:03,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 534 transitions, 8965 flow [2024-06-21 21:45:04,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 534 transitions, 8828 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:04,025 INFO L231 Difference]: Finished difference. Result has 344 places, 520 transitions, 8055 flow [2024-06-21 21:45:04,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8055, PETRI_PLACES=344, PETRI_TRANSITIONS=520} [2024-06-21 21:45:04,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 21:45:04,026 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 520 transitions, 8055 flow [2024-06-21 21:45:04,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:04,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:04,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:45:04,027 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:04,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1282026545, now seen corresponding path program 6 times [2024-06-21 21:45:04,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:04,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504151081] [2024-06-21 21:45:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504151081] [2024-06-21 21:45:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504151081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:04,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:04,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:04,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615547394] [2024-06-21 21:45:04,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:04,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:04,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:04,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:04,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:04,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 520 transitions, 8055 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:04,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:04,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:04,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:06,132 INFO L124 PetriNetUnfolderBase]: 2984/4613 cut-off events. [2024-06-21 21:45:06,132 INFO L125 PetriNetUnfolderBase]: For 310572/310578 co-relation queries the response was YES. [2024-06-21 21:45:06,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38985 conditions, 4613 events. 2984/4613 cut-off events. For 310572/310578 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25416 event pairs, 486 based on Foata normal form. 10/4622 useless extension candidates. Maximal degree in co-relation 38829. Up to 4134 conditions per place. [2024-06-21 21:45:06,201 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 437 selfloop transitions, 106 changer transitions 0/547 dead transitions. [2024-06-21 21:45:06,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 547 transitions, 9297 flow [2024-06-21 21:45:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:45:06,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 21:45:06,202 INFO L175 Difference]: Start difference. First operand has 344 places, 520 transitions, 8055 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:45:06,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 547 transitions, 9297 flow [2024-06-21 21:45:07,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 547 transitions, 8908 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:07,115 INFO L231 Difference]: Finished difference. Result has 346 places, 520 transitions, 7889 flow [2024-06-21 21:45:07,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7666, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7889, PETRI_PLACES=346, PETRI_TRANSITIONS=520} [2024-06-21 21:45:07,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 21:45:07,116 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 520 transitions, 7889 flow [2024-06-21 21:45:07,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:07,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:07,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:45:07,117 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:07,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -566212511, now seen corresponding path program 1 times [2024-06-21 21:45:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:07,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198727109] [2024-06-21 21:45:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:08,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:08,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198727109] [2024-06-21 21:45:08,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198727109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:08,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:08,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:08,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571797653] [2024-06-21 21:45:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:08,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:08,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:08,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 520 transitions, 7889 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:08,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:08,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:08,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:09,382 INFO L124 PetriNetUnfolderBase]: 3020/4654 cut-off events. [2024-06-21 21:45:09,382 INFO L125 PetriNetUnfolderBase]: For 310762/310762 co-relation queries the response was YES. [2024-06-21 21:45:09,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38962 conditions, 4654 events. 3020/4654 cut-off events. For 310762/310762 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25420 event pairs, 416 based on Foata normal form. 8/4661 useless extension candidates. Maximal degree in co-relation 38806. Up to 4175 conditions per place. [2024-06-21 21:45:09,447 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 477 selfloop transitions, 68 changer transitions 0/549 dead transitions. [2024-06-21 21:45:09,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 549 transitions, 9313 flow [2024-06-21 21:45:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:45:09,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 21:45:09,448 INFO L175 Difference]: Start difference. First operand has 346 places, 520 transitions, 7889 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:45:09,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 549 transitions, 9313 flow [2024-06-21 21:45:10,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 549 transitions, 8926 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:45:10,283 INFO L231 Difference]: Finished difference. Result has 346 places, 523 transitions, 7679 flow [2024-06-21 21:45:10,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7504, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7679, PETRI_PLACES=346, PETRI_TRANSITIONS=523} [2024-06-21 21:45:10,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 21:45:10,283 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 523 transitions, 7679 flow [2024-06-21 21:45:10,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:10,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:10,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:10,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:45:10,284 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:10,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:10,284 INFO L85 PathProgramCache]: Analyzing trace with hash -78213203, now seen corresponding path program 2 times [2024-06-21 21:45:10,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:10,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538968164] [2024-06-21 21:45:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:11,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:11,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538968164] [2024-06-21 21:45:11,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538968164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:11,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:11,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:11,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571644335] [2024-06-21 21:45:11,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:11,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:11,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:11,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:11,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 523 transitions, 7679 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:11,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:11,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:11,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:12,801 INFO L124 PetriNetUnfolderBase]: 3002/4634 cut-off events. [2024-06-21 21:45:12,802 INFO L125 PetriNetUnfolderBase]: For 292148/292148 co-relation queries the response was YES. [2024-06-21 21:45:12,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37818 conditions, 4634 events. 3002/4634 cut-off events. For 292148/292148 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25340 event pairs, 402 based on Foata normal form. 8/4641 useless extension candidates. Maximal degree in co-relation 37662. Up to 4167 conditions per place. [2024-06-21 21:45:12,856 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 474 selfloop transitions, 68 changer transitions 0/546 dead transitions. [2024-06-21 21:45:12,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 546 transitions, 8931 flow [2024-06-21 21:45:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:45:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:45:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:45:12,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 21:45:12,857 INFO L175 Difference]: Start difference. First operand has 346 places, 523 transitions, 7679 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:45:12,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 546 transitions, 8931 flow [2024-06-21 21:45:13,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 546 transitions, 8806 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:45:13,691 INFO L231 Difference]: Finished difference. Result has 349 places, 523 transitions, 7696 flow [2024-06-21 21:45:13,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7554, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7696, PETRI_PLACES=349, PETRI_TRANSITIONS=523} [2024-06-21 21:45:13,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 21:45:13,692 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 523 transitions, 7696 flow [2024-06-21 21:45:13,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:13,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:13,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:13,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:45:13,693 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:13,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1903429149, now seen corresponding path program 7 times [2024-06-21 21:45:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:13,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856257475] [2024-06-21 21:45:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856257475] [2024-06-21 21:45:14,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856257475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:14,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:14,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283127321] [2024-06-21 21:45:14,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:14,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:14,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 523 transitions, 7696 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:14,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:14,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:14,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:15,811 INFO L124 PetriNetUnfolderBase]: 3116/4810 cut-off events. [2024-06-21 21:45:15,811 INFO L125 PetriNetUnfolderBase]: For 302394/302400 co-relation queries the response was YES. [2024-06-21 21:45:15,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39601 conditions, 4810 events. 3116/4810 cut-off events. For 302394/302400 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 26592 event pairs, 512 based on Foata normal form. 10/4819 useless extension candidates. Maximal degree in co-relation 39444. Up to 4263 conditions per place. [2024-06-21 21:45:15,879 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 429 selfloop transitions, 153 changer transitions 0/586 dead transitions. [2024-06-21 21:45:15,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 586 transitions, 9682 flow [2024-06-21 21:45:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:45:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:45:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 21:45:15,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:45:15,881 INFO L175 Difference]: Start difference. First operand has 349 places, 523 transitions, 7696 flow. Second operand 10 states and 175 transitions. [2024-06-21 21:45:15,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 586 transitions, 9682 flow [2024-06-21 21:45:16,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 586 transitions, 9536 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:16,739 INFO L231 Difference]: Finished difference. Result has 354 places, 554 transitions, 8439 flow [2024-06-21 21:45:16,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8439, PETRI_PLACES=354, PETRI_TRANSITIONS=554} [2024-06-21 21:45:16,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-21 21:45:16,740 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 554 transitions, 8439 flow [2024-06-21 21:45:16,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:16,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:16,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:45:16,741 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:16,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash -152475035, now seen corresponding path program 8 times [2024-06-21 21:45:16,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:16,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105333726] [2024-06-21 21:45:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:17,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:17,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105333726] [2024-06-21 21:45:17,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105333726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:17,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:17,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594793452] [2024-06-21 21:45:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:17,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:17,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:17,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:17,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:17,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 554 transitions, 8439 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:17,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:17,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:17,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:18,893 INFO L124 PetriNetUnfolderBase]: 3136/4840 cut-off events. [2024-06-21 21:45:18,893 INFO L125 PetriNetUnfolderBase]: For 307619/307625 co-relation queries the response was YES. [2024-06-21 21:45:18,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40367 conditions, 4840 events. 3136/4840 cut-off events. For 307619/307625 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 26799 event pairs, 514 based on Foata normal form. 10/4849 useless extension candidates. Maximal degree in co-relation 40209. Up to 4323 conditions per place. [2024-06-21 21:45:18,958 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 418 selfloop transitions, 156 changer transitions 0/578 dead transitions. [2024-06-21 21:45:18,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 578 transitions, 9753 flow [2024-06-21 21:45:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:45:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:45:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 21:45:18,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-21 21:45:18,960 INFO L175 Difference]: Start difference. First operand has 354 places, 554 transitions, 8439 flow. Second operand 10 states and 167 transitions. [2024-06-21 21:45:18,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 578 transitions, 9753 flow [2024-06-21 21:45:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 578 transitions, 9482 flow, removed 98 selfloop flow, removed 3 redundant places. [2024-06-21 21:45:19,729 INFO L231 Difference]: Finished difference. Result has 361 places, 557 transitions, 8577 flow [2024-06-21 21:45:19,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8202, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8577, PETRI_PLACES=361, PETRI_TRANSITIONS=557} [2024-06-21 21:45:19,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-21 21:45:19,729 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 557 transitions, 8577 flow [2024-06-21 21:45:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:19,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:19,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:19,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:45:19,730 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:19,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1018073243, now seen corresponding path program 9 times [2024-06-21 21:45:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512754118] [2024-06-21 21:45:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:20,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:20,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512754118] [2024-06-21 21:45:20,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512754118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:20,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:20,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:20,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238021032] [2024-06-21 21:45:20,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:20,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:20,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:20,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 557 transitions, 8577 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:20,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:20,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:20,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:21,935 INFO L124 PetriNetUnfolderBase]: 3188/4910 cut-off events. [2024-06-21 21:45:21,935 INFO L125 PetriNetUnfolderBase]: For 324425/324431 co-relation queries the response was YES. [2024-06-21 21:45:21,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41431 conditions, 4910 events. 3188/4910 cut-off events. For 324425/324431 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27165 event pairs, 524 based on Foata normal form. 10/4919 useless extension candidates. Maximal degree in co-relation 41271. Up to 4235 conditions per place. [2024-06-21 21:45:22,001 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 441 selfloop transitions, 160 changer transitions 0/605 dead transitions. [2024-06-21 21:45:22,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 605 transitions, 10441 flow [2024-06-21 21:45:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:45:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:45:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 21:45:22,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 21:45:22,002 INFO L175 Difference]: Start difference. First operand has 361 places, 557 transitions, 8577 flow. Second operand 11 states and 193 transitions. [2024-06-21 21:45:22,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 605 transitions, 10441 flow [2024-06-21 21:45:23,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 605 transitions, 10088 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 21:45:23,031 INFO L231 Difference]: Finished difference. Result has 364 places, 563 transitions, 8729 flow [2024-06-21 21:45:23,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8228, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8729, PETRI_PLACES=364, PETRI_TRANSITIONS=563} [2024-06-21 21:45:23,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 21:45:23,031 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 563 transitions, 8729 flow [2024-06-21 21:45:23,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:23,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:23,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:23,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:45:23,032 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:23,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1014354173, now seen corresponding path program 10 times [2024-06-21 21:45:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:23,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678966429] [2024-06-21 21:45:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678966429] [2024-06-21 21:45:23,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678966429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:23,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:23,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:45:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168488206] [2024-06-21 21:45:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:23,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:45:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:45:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:45:24,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:24,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 563 transitions, 8729 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:45:24,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:24,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:24,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:25,369 INFO L124 PetriNetUnfolderBase]: 3250/5010 cut-off events. [2024-06-21 21:45:25,369 INFO L125 PetriNetUnfolderBase]: For 339685/339691 co-relation queries the response was YES. [2024-06-21 21:45:25,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42901 conditions, 5010 events. 3250/5010 cut-off events. For 339685/339691 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27863 event pairs, 526 based on Foata normal form. 10/5019 useless extension candidates. Maximal degree in co-relation 42741. Up to 4591 conditions per place. [2024-06-21 21:45:25,440 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 513 selfloop transitions, 91 changer transitions 0/608 dead transitions. [2024-06-21 21:45:25,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 608 transitions, 10526 flow [2024-06-21 21:45:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:45:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:45:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 21:45:25,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:45:25,441 INFO L175 Difference]: Start difference. First operand has 364 places, 563 transitions, 8729 flow. Second operand 11 states and 187 transitions. [2024-06-21 21:45:25,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 608 transitions, 10526 flow [2024-06-21 21:45:26,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 608 transitions, 9820 flow, removed 134 selfloop flow, removed 11 redundant places. [2024-06-21 21:45:26,670 INFO L231 Difference]: Finished difference. Result has 365 places, 574 transitions, 8510 flow [2024-06-21 21:45:26,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8120, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8510, PETRI_PLACES=365, PETRI_TRANSITIONS=574} [2024-06-21 21:45:26,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 21:45:26,670 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 574 transitions, 8510 flow [2024-06-21 21:45:26,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:45:26,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:26,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:26,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:45:26,671 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:26,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1408433297, now seen corresponding path program 11 times [2024-06-21 21:45:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:26,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023075800] [2024-06-21 21:45:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:27,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:27,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023075800] [2024-06-21 21:45:27,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023075800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:27,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:27,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:27,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237980636] [2024-06-21 21:45:27,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:27,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:27,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:27,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:27,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 574 transitions, 8510 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:27,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:27,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:27,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:28,991 INFO L124 PetriNetUnfolderBase]: 3238/4996 cut-off events. [2024-06-21 21:45:28,991 INFO L125 PetriNetUnfolderBase]: For 329541/329547 co-relation queries the response was YES. [2024-06-21 21:45:29,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41151 conditions, 4996 events. 3238/4996 cut-off events. For 329541/329547 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27816 event pairs, 530 based on Foata normal form. 10/5005 useless extension candidates. Maximal degree in co-relation 40994. Up to 4583 conditions per place. [2024-06-21 21:45:29,067 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 513 selfloop transitions, 91 changer transitions 0/608 dead transitions. [2024-06-21 21:45:29,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 608 transitions, 9902 flow [2024-06-21 21:45:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:45:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:45:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-21 21:45:29,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41458333333333336 [2024-06-21 21:45:29,068 INFO L175 Difference]: Start difference. First operand has 365 places, 574 transitions, 8510 flow. Second operand 12 states and 199 transitions. [2024-06-21 21:45:29,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 608 transitions, 9902 flow [2024-06-21 21:45:30,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 608 transitions, 9726 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:45:30,280 INFO L231 Difference]: Finished difference. Result has 370 places, 574 transitions, 8522 flow [2024-06-21 21:45:30,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8334, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8522, PETRI_PLACES=370, PETRI_TRANSITIONS=574} [2024-06-21 21:45:30,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-21 21:45:30,280 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 574 transitions, 8522 flow [2024-06-21 21:45:30,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:30,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:30,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:30,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:45:30,281 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:30,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2106573861, now seen corresponding path program 12 times [2024-06-21 21:45:30,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:30,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657180299] [2024-06-21 21:45:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:30,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:31,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657180299] [2024-06-21 21:45:31,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657180299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:31,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:31,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:45:31,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89212879] [2024-06-21 21:45:31,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:31,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:45:31,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:31,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:45:31,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:45:31,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:31,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 574 transitions, 8522 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:45:31,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:31,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:31,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:32,296 INFO L124 PetriNetUnfolderBase]: 3282/5047 cut-off events. [2024-06-21 21:45:32,297 INFO L125 PetriNetUnfolderBase]: For 346195/346201 co-relation queries the response was YES. [2024-06-21 21:45:32,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42179 conditions, 5047 events. 3282/5047 cut-off events. For 346195/346201 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27985 event pairs, 484 based on Foata normal form. 10/5056 useless extension candidates. Maximal degree in co-relation 42020. Up to 3850 conditions per place. [2024-06-21 21:45:32,371 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 362 selfloop transitions, 241 changer transitions 0/607 dead transitions. [2024-06-21 21:45:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 607 transitions, 10178 flow [2024-06-21 21:45:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:45:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:45:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:45:32,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 21:45:32,372 INFO L175 Difference]: Start difference. First operand has 370 places, 574 transitions, 8522 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:45:32,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 607 transitions, 10178 flow [2024-06-21 21:45:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 607 transitions, 10014 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 21:45:33,537 INFO L231 Difference]: Finished difference. Result has 370 places, 580 transitions, 9020 flow [2024-06-21 21:45:33,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8358, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9020, PETRI_PLACES=370, PETRI_TRANSITIONS=580} [2024-06-21 21:45:33,538 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-21 21:45:33,538 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 580 transitions, 9020 flow [2024-06-21 21:45:33,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:45:33,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:33,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:45:33,538 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:33,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash -59224447, now seen corresponding path program 13 times [2024-06-21 21:45:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:33,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209776030] [2024-06-21 21:45:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:34,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:34,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209776030] [2024-06-21 21:45:34,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209776030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:34,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:34,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:34,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543197665] [2024-06-21 21:45:34,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:34,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:34,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:34,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:34,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 580 transitions, 9020 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:34,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:34,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:34,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:35,956 INFO L124 PetriNetUnfolderBase]: 3366/5173 cut-off events. [2024-06-21 21:45:35,956 INFO L125 PetriNetUnfolderBase]: For 382409/382415 co-relation queries the response was YES. [2024-06-21 21:45:36,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44746 conditions, 5173 events. 3366/5173 cut-off events. For 382409/382415 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28815 event pairs, 548 based on Foata normal form. 10/5182 useless extension candidates. Maximal degree in co-relation 44586. Up to 4727 conditions per place. [2024-06-21 21:45:36,025 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 501 selfloop transitions, 114 changer transitions 0/619 dead transitions. [2024-06-21 21:45:36,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 619 transitions, 10856 flow [2024-06-21 21:45:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:45:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:45:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 213 transitions. [2024-06-21 21:45:36,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096153846153846 [2024-06-21 21:45:36,026 INFO L175 Difference]: Start difference. First operand has 370 places, 580 transitions, 9020 flow. Second operand 13 states and 213 transitions. [2024-06-21 21:45:36,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 619 transitions, 10856 flow [2024-06-21 21:45:37,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 619 transitions, 10588 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:37,079 INFO L231 Difference]: Finished difference. Result has 379 places, 589 transitions, 9195 flow [2024-06-21 21:45:37,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8752, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9195, PETRI_PLACES=379, PETRI_TRANSITIONS=589} [2024-06-21 21:45:37,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 21:45:37,080 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 589 transitions, 9195 flow [2024-06-21 21:45:37,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:37,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:37,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:45:37,080 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:37,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1377871055, now seen corresponding path program 14 times [2024-06-21 21:45:37,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095359598] [2024-06-21 21:45:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:37,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:37,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095359598] [2024-06-21 21:45:37,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095359598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:37,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:37,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038698980] [2024-06-21 21:45:37,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:37,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:38,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:38,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 589 transitions, 9195 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:38,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:38,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:38,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:39,459 INFO L124 PetriNetUnfolderBase]: 3354/5157 cut-off events. [2024-06-21 21:45:39,459 INFO L125 PetriNetUnfolderBase]: For 375517/375523 co-relation queries the response was YES. [2024-06-21 21:45:39,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44324 conditions, 5157 events. 3354/5157 cut-off events. For 375517/375523 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28788 event pairs, 542 based on Foata normal form. 10/5166 useless extension candidates. Maximal degree in co-relation 44161. Up to 4719 conditions per place. [2024-06-21 21:45:39,539 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 495 selfloop transitions, 114 changer transitions 0/613 dead transitions. [2024-06-21 21:45:39,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 613 transitions, 10661 flow [2024-06-21 21:45:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:45:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:45:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 21:45:39,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-21 21:45:39,540 INFO L175 Difference]: Start difference. First operand has 379 places, 589 transitions, 9195 flow. Second operand 11 states and 183 transitions. [2024-06-21 21:45:39,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 613 transitions, 10661 flow [2024-06-21 21:45:40,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 613 transitions, 10400 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 21:45:40,959 INFO L231 Difference]: Finished difference. Result has 382 places, 589 transitions, 9168 flow [2024-06-21 21:45:40,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9168, PETRI_PLACES=382, PETRI_TRANSITIONS=589} [2024-06-21 21:45:40,960 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-21 21:45:40,960 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 589 transitions, 9168 flow [2024-06-21 21:45:40,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:40,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:40,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:45:40,961 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:40,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1390995215, now seen corresponding path program 15 times [2024-06-21 21:45:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:40,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906539345] [2024-06-21 21:45:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:40,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:41,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:41,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906539345] [2024-06-21 21:45:41,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906539345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:41,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:41,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:41,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611654828] [2024-06-21 21:45:41,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:41,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:41,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:41,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 589 transitions, 9168 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:41,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:41,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:41,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:43,178 INFO L124 PetriNetUnfolderBase]: 3438/5281 cut-off events. [2024-06-21 21:45:43,178 INFO L125 PetriNetUnfolderBase]: For 408139/408145 co-relation queries the response was YES. [2024-06-21 21:45:43,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46194 conditions, 5281 events. 3438/5281 cut-off events. For 408139/408145 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29604 event pairs, 500 based on Foata normal form. 10/5290 useless extension candidates. Maximal degree in co-relation 46030. Up to 4419 conditions per place. [2024-06-21 21:45:43,260 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 435 selfloop transitions, 188 changer transitions 0/627 dead transitions. [2024-06-21 21:45:43,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 627 transitions, 11104 flow [2024-06-21 21:45:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:45:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:45:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 21:45:43,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-21 21:45:43,263 INFO L175 Difference]: Start difference. First operand has 382 places, 589 transitions, 9168 flow. Second operand 11 states and 191 transitions. [2024-06-21 21:45:43,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 627 transitions, 11104 flow [2024-06-21 21:45:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 627 transitions, 10876 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 21:45:44,821 INFO L231 Difference]: Finished difference. Result has 383 places, 598 transitions, 9568 flow [2024-06-21 21:45:44,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8940, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9568, PETRI_PLACES=383, PETRI_TRANSITIONS=598} [2024-06-21 21:45:44,822 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 21:45:44,822 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 598 transitions, 9568 flow [2024-06-21 21:45:44,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:44,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:44,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:44,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:45:44,823 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:44,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1390758065, now seen corresponding path program 16 times [2024-06-21 21:45:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:44,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286567978] [2024-06-21 21:45:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286567978] [2024-06-21 21:45:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286567978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:45,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:45,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:45,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231678558] [2024-06-21 21:45:45,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:45,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:45,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:45,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 598 transitions, 9568 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:45,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:45,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:45,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:47,275 INFO L124 PetriNetUnfolderBase]: 3426/5263 cut-off events. [2024-06-21 21:45:47,275 INFO L125 PetriNetUnfolderBase]: For 408855/408861 co-relation queries the response was YES. [2024-06-21 21:45:47,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46307 conditions, 5263 events. 3426/5263 cut-off events. For 408855/408861 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29480 event pairs, 496 based on Foata normal form. 10/5272 useless extension candidates. Maximal degree in co-relation 46142. Up to 4411 conditions per place. [2024-06-21 21:45:47,360 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 434 selfloop transitions, 192 changer transitions 0/630 dead transitions. [2024-06-21 21:45:47,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 630 transitions, 11298 flow [2024-06-21 21:45:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:45:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:45:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 216 transitions. [2024-06-21 21:45:47,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153846153846154 [2024-06-21 21:45:47,361 INFO L175 Difference]: Start difference. First operand has 383 places, 598 transitions, 9568 flow. Second operand 13 states and 216 transitions. [2024-06-21 21:45:47,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 630 transitions, 11298 flow [2024-06-21 21:45:48,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 630 transitions, 10985 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:48,974 INFO L231 Difference]: Finished difference. Result has 390 places, 598 transitions, 9645 flow [2024-06-21 21:45:48,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9255, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9645, PETRI_PLACES=390, PETRI_TRANSITIONS=598} [2024-06-21 21:45:48,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 21:45:48,975 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 598 transitions, 9645 flow [2024-06-21 21:45:48,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:48,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:48,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:48,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:45:48,976 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:48,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2025275871, now seen corresponding path program 17 times [2024-06-21 21:45:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:48,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802511209] [2024-06-21 21:45:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:49,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:49,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802511209] [2024-06-21 21:45:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802511209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:49,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:49,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:49,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223442450] [2024-06-21 21:45:49,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:49,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:49,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:49,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:49,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 598 transitions, 9645 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:49,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:49,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:49,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:51,161 INFO L124 PetriNetUnfolderBase]: 3414/5247 cut-off events. [2024-06-21 21:45:51,161 INFO L125 PetriNetUnfolderBase]: For 405256/405262 co-relation queries the response was YES. [2024-06-21 21:45:51,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46290 conditions, 5247 events. 3414/5247 cut-off events. For 405256/405262 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29378 event pairs, 496 based on Foata normal form. 10/5256 useless extension candidates. Maximal degree in co-relation 46123. Up to 4403 conditions per place. [2024-06-21 21:45:51,247 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 439 selfloop transitions, 181 changer transitions 0/624 dead transitions. [2024-06-21 21:45:51,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 624 transitions, 11189 flow [2024-06-21 21:45:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:45:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:45:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:45:51,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:45:51,248 INFO L175 Difference]: Start difference. First operand has 390 places, 598 transitions, 9645 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:45:51,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 624 transitions, 11189 flow [2024-06-21 21:45:52,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 624 transitions, 10768 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-21 21:45:52,828 INFO L231 Difference]: Finished difference. Result has 389 places, 598 transitions, 9592 flow [2024-06-21 21:45:52,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9224, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9592, PETRI_PLACES=389, PETRI_TRANSITIONS=598} [2024-06-21 21:45:52,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 21:45:52,829 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 598 transitions, 9592 flow [2024-06-21 21:45:52,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:52,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:52,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:52,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:45:52,829 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:52,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1385217125, now seen corresponding path program 18 times [2024-06-21 21:45:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:52,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052929427] [2024-06-21 21:45:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:53,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052929427] [2024-06-21 21:45:53,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052929427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:53,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:53,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:45:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174111333] [2024-06-21 21:45:53,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:53,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:45:53,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:53,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:45:53,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:45:53,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 598 transitions, 9592 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:53,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:55,313 INFO L124 PetriNetUnfolderBase]: 3402/5219 cut-off events. [2024-06-21 21:45:55,313 INFO L125 PetriNetUnfolderBase]: For 402281/402287 co-relation queries the response was YES. [2024-06-21 21:45:55,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45779 conditions, 5219 events. 3402/5219 cut-off events. For 402281/402287 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29102 event pairs, 562 based on Foata normal form. 10/5228 useless extension candidates. Maximal degree in co-relation 45611. Up to 4847 conditions per place. [2024-06-21 21:45:55,386 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 506 selfloop transitions, 106 changer transitions 0/616 dead transitions. [2024-06-21 21:45:55,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 616 transitions, 10888 flow [2024-06-21 21:45:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:45:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:45:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:45:55,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 21:45:55,388 INFO L175 Difference]: Start difference. First operand has 389 places, 598 transitions, 9592 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:45:55,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 616 transitions, 10888 flow [2024-06-21 21:45:56,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 616 transitions, 10427 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 21:45:56,827 INFO L231 Difference]: Finished difference. Result has 390 places, 598 transitions, 9350 flow [2024-06-21 21:45:56,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9350, PETRI_PLACES=390, PETRI_TRANSITIONS=598} [2024-06-21 21:45:56,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 21:45:56,827 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 598 transitions, 9350 flow [2024-06-21 21:45:56,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:45:56,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:56,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:56,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:45:56,828 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:56,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1699635041, now seen corresponding path program 19 times [2024-06-21 21:45:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:56,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078072700] [2024-06-21 21:45:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:56,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078072700] [2024-06-21 21:45:57,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078072700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:57,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:57,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:45:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495619710] [2024-06-21 21:45:57,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:57,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:45:57,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:57,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:45:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:45:57,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:45:57,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 598 transitions, 9350 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:45:57,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:57,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:45:57,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:59,145 INFO L124 PetriNetUnfolderBase]: 3422/5253 cut-off events. [2024-06-21 21:45:59,145 INFO L125 PetriNetUnfolderBase]: For 409250/409256 co-relation queries the response was YES. [2024-06-21 21:45:59,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45594 conditions, 5253 events. 3422/5253 cut-off events. For 409250/409256 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29359 event pairs, 558 based on Foata normal form. 10/5262 useless extension candidates. Maximal degree in co-relation 45425. Up to 4761 conditions per place. [2024-06-21 21:45:59,224 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 528 selfloop transitions, 95 changer transitions 0/627 dead transitions. [2024-06-21 21:45:59,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 627 transitions, 10952 flow [2024-06-21 21:45:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:45:59,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:45:59,225 INFO L175 Difference]: Start difference. First operand has 390 places, 598 transitions, 9350 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:45:59,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 627 transitions, 10952 flow [2024-06-21 21:46:00,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 627 transitions, 10706 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 21:46:00,874 INFO L231 Difference]: Finished difference. Result has 388 places, 601 transitions, 9368 flow [2024-06-21 21:46:00,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9104, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9368, PETRI_PLACES=388, PETRI_TRANSITIONS=601} [2024-06-21 21:46:00,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 21:46:00,875 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 601 transitions, 9368 flow [2024-06-21 21:46:00,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:00,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:00,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:00,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:46:00,875 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:00,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2108730550, now seen corresponding path program 2 times [2024-06-21 21:46:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:00,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645137845] [2024-06-21 21:46:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:01,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:01,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645137845] [2024-06-21 21:46:01,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645137845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:01,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:01,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:46:01,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816859846] [2024-06-21 21:46:01,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:01,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:46:01,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:46:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:46:01,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:01,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 601 transitions, 9368 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:01,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:01,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:01,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:03,202 INFO L124 PetriNetUnfolderBase]: 3429/5262 cut-off events. [2024-06-21 21:46:03,202 INFO L125 PetriNetUnfolderBase]: For 413805/413805 co-relation queries the response was YES. [2024-06-21 21:46:03,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45801 conditions, 5262 events. 3429/5262 cut-off events. For 413805/413805 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29419 event pairs, 571 based on Foata normal form. 3/5264 useless extension candidates. Maximal degree in co-relation 45631. Up to 4917 conditions per place. [2024-06-21 21:46:03,282 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 546 selfloop transitions, 68 changer transitions 0/618 dead transitions. [2024-06-21 21:46:03,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 618 transitions, 10764 flow [2024-06-21 21:46:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:46:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:46:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:46:03,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 21:46:03,283 INFO L175 Difference]: Start difference. First operand has 388 places, 601 transitions, 9368 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:46:03,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 618 transitions, 10764 flow [2024-06-21 21:46:04,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 618 transitions, 10400 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:04,891 INFO L231 Difference]: Finished difference. Result has 388 places, 604 transitions, 9242 flow [2024-06-21 21:46:04,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9004, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9242, PETRI_PLACES=388, PETRI_TRANSITIONS=604} [2024-06-21 21:46:04,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 21:46:04,892 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 604 transitions, 9242 flow [2024-06-21 21:46:04,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:04,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:04,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:04,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:46:04,892 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:04,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1706981111, now seen corresponding path program 20 times [2024-06-21 21:46:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:04,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517926237] [2024-06-21 21:46:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:05,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:05,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517926237] [2024-06-21 21:46:05,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517926237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:05,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:05,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:05,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249178721] [2024-06-21 21:46:05,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:05,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:05,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:05,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:05,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 604 transitions, 9242 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:05,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:05,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:05,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:07,330 INFO L124 PetriNetUnfolderBase]: 3417/5257 cut-off events. [2024-06-21 21:46:07,330 INFO L125 PetriNetUnfolderBase]: For 413077/413083 co-relation queries the response was YES. [2024-06-21 21:46:07,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45214 conditions, 5257 events. 3417/5257 cut-off events. For 413077/413083 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29485 event pairs, 556 based on Foata normal form. 10/5266 useless extension candidates. Maximal degree in co-relation 45045. Up to 4823 conditions per place. [2024-06-21 21:46:07,410 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 526 selfloop transitions, 98 changer transitions 0/628 dead transitions. [2024-06-21 21:46:07,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 628 transitions, 10594 flow [2024-06-21 21:46:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:46:07,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:46:07,412 INFO L175 Difference]: Start difference. First operand has 388 places, 604 transitions, 9242 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:46:07,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 628 transitions, 10594 flow [2024-06-21 21:46:08,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 628 transitions, 10352 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:08,816 INFO L231 Difference]: Finished difference. Result has 390 places, 604 transitions, 9203 flow [2024-06-21 21:46:08,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9000, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9203, PETRI_PLACES=390, PETRI_TRANSITIONS=604} [2024-06-21 21:46:08,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 21:46:08,816 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 604 transitions, 9203 flow [2024-06-21 21:46:08,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:08,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:08,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:08,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:46:08,817 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:08,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash -840089115, now seen corresponding path program 21 times [2024-06-21 21:46:08,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:08,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266485475] [2024-06-21 21:46:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:08,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266485475] [2024-06-21 21:46:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266485475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:09,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:09,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545444667] [2024-06-21 21:46:09,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:09,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:09,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:09,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 604 transitions, 9203 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:09,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:09,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:09,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:11,045 INFO L124 PetriNetUnfolderBase]: 3437/5283 cut-off events. [2024-06-21 21:46:11,045 INFO L125 PetriNetUnfolderBase]: For 413094/413100 co-relation queries the response was YES. [2024-06-21 21:46:11,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45371 conditions, 5283 events. 3437/5283 cut-off events. For 413094/413100 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29657 event pairs, 520 based on Foata normal form. 10/5292 useless extension candidates. Maximal degree in co-relation 45202. Up to 4497 conditions per place. [2024-06-21 21:46:11,118 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 476 selfloop transitions, 154 changer transitions 0/634 dead transitions. [2024-06-21 21:46:11,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 634 transitions, 11005 flow [2024-06-21 21:46:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:46:11,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 21:46:11,119 INFO L175 Difference]: Start difference. First operand has 390 places, 604 transitions, 9203 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:46:11,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 634 transitions, 11005 flow [2024-06-21 21:46:12,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 634 transitions, 10689 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:46:12,693 INFO L231 Difference]: Finished difference. Result has 390 places, 607 transitions, 9287 flow [2024-06-21 21:46:12,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8887, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9287, PETRI_PLACES=390, PETRI_TRANSITIONS=607} [2024-06-21 21:46:12,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 21:46:12,694 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 607 transitions, 9287 flow [2024-06-21 21:46:12,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:12,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:12,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:12,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:46:12,695 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:12,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2103016630, now seen corresponding path program 3 times [2024-06-21 21:46:12,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:12,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634118648] [2024-06-21 21:46:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:12,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634118648] [2024-06-21 21:46:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634118648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:13,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:13,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897639282] [2024-06-21 21:46:13,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:13,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:13,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:13,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 607 transitions, 9287 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:13,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:13,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:13,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:14,876 INFO L124 PetriNetUnfolderBase]: 3431/5274 cut-off events. [2024-06-21 21:46:14,876 INFO L125 PetriNetUnfolderBase]: For 411185/411185 co-relation queries the response was YES. [2024-06-21 21:46:14,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45440 conditions, 5274 events. 3431/5274 cut-off events. For 411185/411185 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29583 event pairs, 556 based on Foata normal form. 2/5275 useless extension candidates. Maximal degree in co-relation 45270. Up to 4848 conditions per place. [2024-06-21 21:46:14,958 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 531 selfloop transitions, 90 changer transitions 0/625 dead transitions. [2024-06-21 21:46:14,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 625 transitions, 10711 flow [2024-06-21 21:46:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:46:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:46:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:46:14,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:46:14,960 INFO L175 Difference]: Start difference. First operand has 390 places, 607 transitions, 9287 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:46:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 625 transitions, 10711 flow [2024-06-21 21:46:16,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 625 transitions, 10062 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:16,612 INFO L231 Difference]: Finished difference. Result has 390 places, 610 transitions, 8926 flow [2024-06-21 21:46:16,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8638, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8926, PETRI_PLACES=390, PETRI_TRANSITIONS=610} [2024-06-21 21:46:16,613 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 21:46:16,613 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 610 transitions, 8926 flow [2024-06-21 21:46:16,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:16,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:16,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:16,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:46:16,614 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:16,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:16,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1757872949, now seen corresponding path program 22 times [2024-06-21 21:46:16,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:16,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236135003] [2024-06-21 21:46:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:16,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236135003] [2024-06-21 21:46:17,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236135003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:17,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:17,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:46:17,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294049272] [2024-06-21 21:46:17,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:17,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:46:17,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:46:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:46:17,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:17,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 610 transitions, 8926 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:17,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:17,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:17,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:18,776 INFO L124 PetriNetUnfolderBase]: 3451/5305 cut-off events. [2024-06-21 21:46:18,776 INFO L125 PetriNetUnfolderBase]: For 424152/424158 co-relation queries the response was YES. [2024-06-21 21:46:18,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44760 conditions, 5305 events. 3451/5305 cut-off events. For 424152/424158 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 29773 event pairs, 567 based on Foata normal form. 10/5314 useless extension candidates. Maximal degree in co-relation 44591. Up to 5048 conditions per place. [2024-06-21 21:46:18,859 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 585 selfloop transitions, 39 changer transitions 0/628 dead transitions. [2024-06-21 21:46:18,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 628 transitions, 10330 flow [2024-06-21 21:46:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:46:18,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 21:46:18,861 INFO L175 Difference]: Start difference. First operand has 390 places, 610 transitions, 8926 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:46:18,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 628 transitions, 10330 flow [2024-06-21 21:46:20,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 628 transitions, 10076 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:20,209 INFO L231 Difference]: Finished difference. Result has 392 places, 613 transitions, 8842 flow [2024-06-21 21:46:20,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8672, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8842, PETRI_PLACES=392, PETRI_TRANSITIONS=613} [2024-06-21 21:46:20,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-21 21:46:20,210 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 613 transitions, 8842 flow [2024-06-21 21:46:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:20,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:20,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:20,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:46:20,210 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:20,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:20,210 INFO L85 PathProgramCache]: Analyzing trace with hash 549817375, now seen corresponding path program 23 times [2024-06-21 21:46:20,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:20,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717126943] [2024-06-21 21:46:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:20,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:20,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:20,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717126943] [2024-06-21 21:46:20,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717126943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:20,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:20,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:20,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272534193] [2024-06-21 21:46:20,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:20,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:21,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:21,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 613 transitions, 8842 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:21,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:21,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:21,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:22,395 INFO L124 PetriNetUnfolderBase]: 3503/5383 cut-off events. [2024-06-21 21:46:22,395 INFO L125 PetriNetUnfolderBase]: For 438291/438297 co-relation queries the response was YES. [2024-06-21 21:46:22,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45576 conditions, 5383 events. 3503/5383 cut-off events. For 438291/438297 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 30311 event pairs, 571 based on Foata normal form. 10/5392 useless extension candidates. Maximal degree in co-relation 45407. Up to 4990 conditions per place. [2024-06-21 21:46:22,472 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 575 selfloop transitions, 58 changer transitions 0/637 dead transitions. [2024-06-21 21:46:22,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 637 transitions, 10540 flow [2024-06-21 21:46:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:46:22,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 21:46:22,473 INFO L175 Difference]: Start difference. First operand has 392 places, 613 transitions, 8842 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:46:22,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 637 transitions, 10540 flow [2024-06-21 21:46:23,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 637 transitions, 10398 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:23,911 INFO L231 Difference]: Finished difference. Result has 394 places, 619 transitions, 9000 flow [2024-06-21 21:46:23,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8700, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9000, PETRI_PLACES=394, PETRI_TRANSITIONS=619} [2024-06-21 21:46:23,911 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-21 21:46:23,912 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 619 transitions, 9000 flow [2024-06-21 21:46:23,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:23,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:23,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:23,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:46:23,912 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:23,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1906698611, now seen corresponding path program 24 times [2024-06-21 21:46:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:23,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474225643] [2024-06-21 21:46:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:23,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:24,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:24,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474225643] [2024-06-21 21:46:24,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474225643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:24,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:24,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:24,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228845115] [2024-06-21 21:46:24,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:24,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:24,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:24,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:24,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:24,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 619 transitions, 9000 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:24,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:24,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:24,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:26,064 INFO L124 PetriNetUnfolderBase]: 3491/5367 cut-off events. [2024-06-21 21:46:26,065 INFO L125 PetriNetUnfolderBase]: For 434231/434237 co-relation queries the response was YES. [2024-06-21 21:46:26,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45172 conditions, 5367 events. 3491/5367 cut-off events. For 434231/434237 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 30187 event pairs, 555 based on Foata normal form. 10/5376 useless extension candidates. Maximal degree in co-relation 45002. Up to 4982 conditions per place. [2024-06-21 21:46:26,152 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 571 selfloop transitions, 61 changer transitions 0/636 dead transitions. [2024-06-21 21:46:26,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 636 transitions, 10362 flow [2024-06-21 21:46:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:46:26,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 21:46:26,153 INFO L175 Difference]: Start difference. First operand has 394 places, 619 transitions, 9000 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:46:26,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 636 transitions, 10362 flow [2024-06-21 21:46:27,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 636 transitions, 10156 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-21 21:46:27,645 INFO L231 Difference]: Finished difference. Result has 398 places, 619 transitions, 8922 flow [2024-06-21 21:46:27,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8794, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8922, PETRI_PLACES=398, PETRI_TRANSITIONS=619} [2024-06-21 21:46:27,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-21 21:46:27,646 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 619 transitions, 8922 flow [2024-06-21 21:46:27,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:27,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:27,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:27,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:46:27,646 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:27,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1699629461, now seen corresponding path program 25 times [2024-06-21 21:46:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:27,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183760349] [2024-06-21 21:46:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:28,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:28,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183760349] [2024-06-21 21:46:28,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183760349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:28,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:28,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:46:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987230272] [2024-06-21 21:46:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:28,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:46:28,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:46:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:46:28,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:28,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 619 transitions, 8922 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:28,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:28,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:28,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:30,061 INFO L124 PetriNetUnfolderBase]: 3479/5355 cut-off events. [2024-06-21 21:46:30,061 INFO L125 PetriNetUnfolderBase]: For 428010/428016 co-relation queries the response was YES. [2024-06-21 21:46:30,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44688 conditions, 5355 events. 3479/5355 cut-off events. For 428010/428016 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30214 event pairs, 585 based on Foata normal form. 10/5364 useless extension candidates. Maximal degree in co-relation 44516. Up to 4859 conditions per place. [2024-06-21 21:46:30,143 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 550 selfloop transitions, 99 changer transitions 0/653 dead transitions. [2024-06-21 21:46:30,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 653 transitions, 10410 flow [2024-06-21 21:46:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 21:46:30,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425 [2024-06-21 21:46:30,144 INFO L175 Difference]: Start difference. First operand has 398 places, 619 transitions, 8922 flow. Second operand 10 states and 177 transitions. [2024-06-21 21:46:30,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 653 transitions, 10410 flow [2024-06-21 21:46:31,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 653 transitions, 10246 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:31,826 INFO L231 Difference]: Finished difference. Result has 401 places, 619 transitions, 8963 flow [2024-06-21 21:46:31,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8758, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8963, PETRI_PLACES=401, PETRI_TRANSITIONS=619} [2024-06-21 21:46:31,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-21 21:46:31,827 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 619 transitions, 8963 flow [2024-06-21 21:46:31,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:31,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:31,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:31,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:46:31,827 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:31,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash 343365745, now seen corresponding path program 26 times [2024-06-21 21:46:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:31,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376634847] [2024-06-21 21:46:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:32,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376634847] [2024-06-21 21:46:32,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376634847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:32,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:32,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543506521] [2024-06-21 21:46:32,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:32,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:32,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:32,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:32,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 619 transitions, 8963 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:32,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:32,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:32,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:34,018 INFO L124 PetriNetUnfolderBase]: 3499/5383 cut-off events. [2024-06-21 21:46:34,018 INFO L125 PetriNetUnfolderBase]: For 438398/438404 co-relation queries the response was YES. [2024-06-21 21:46:34,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45129 conditions, 5383 events. 3499/5383 cut-off events. For 438398/438404 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30400 event pairs, 565 based on Foata normal form. 10/5392 useless extension candidates. Maximal degree in co-relation 44956. Up to 4545 conditions per place. [2024-06-21 21:46:34,097 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 491 selfloop transitions, 150 changer transitions 0/645 dead transitions. [2024-06-21 21:46:34,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 645 transitions, 10635 flow [2024-06-21 21:46:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:46:34,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 21:46:34,098 INFO L175 Difference]: Start difference. First operand has 401 places, 619 transitions, 8963 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:46:34,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 645 transitions, 10635 flow [2024-06-21 21:46:35,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 645 transitions, 10368 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 21:46:35,961 INFO L231 Difference]: Finished difference. Result has 399 places, 622 transitions, 9094 flow [2024-06-21 21:46:35,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8696, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9094, PETRI_PLACES=399, PETRI_TRANSITIONS=622} [2024-06-21 21:46:35,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-21 21:46:35,962 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 622 transitions, 9094 flow [2024-06-21 21:46:35,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:35,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:35,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:35,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:46:35,962 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:35,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash -834726735, now seen corresponding path program 27 times [2024-06-21 21:46:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:35,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177325322] [2024-06-21 21:46:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:35,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:36,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177325322] [2024-06-21 21:46:36,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177325322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:36,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:36,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:46:36,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122455822] [2024-06-21 21:46:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:46:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:46:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:46:36,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:36,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 622 transitions, 9094 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:36,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:36,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:36,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:38,095 INFO L124 PetriNetUnfolderBase]: 3487/5367 cut-off events. [2024-06-21 21:46:38,096 INFO L125 PetriNetUnfolderBase]: For 433888/433894 co-relation queries the response was YES. [2024-06-21 21:46:38,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44917 conditions, 5367 events. 3487/5367 cut-off events. For 433888/433894 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30280 event pairs, 557 based on Foata normal form. 10/5376 useless extension candidates. Maximal degree in co-relation 44743. Up to 4537 conditions per place. [2024-06-21 21:46:38,179 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 488 selfloop transitions, 152 changer transitions 0/644 dead transitions. [2024-06-21 21:46:38,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 644 transitions, 10504 flow [2024-06-21 21:46:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:46:38,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:46:38,180 INFO L175 Difference]: Start difference. First operand has 399 places, 622 transitions, 9094 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:46:38,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 644 transitions, 10504 flow [2024-06-21 21:46:40,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 644 transitions, 9883 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:40,067 INFO L231 Difference]: Finished difference. Result has 400 places, 622 transitions, 8783 flow [2024-06-21 21:46:40,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8473, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8783, PETRI_PLACES=400, PETRI_TRANSITIONS=622} [2024-06-21 21:46:40,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-21 21:46:40,068 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 622 transitions, 8783 flow [2024-06-21 21:46:40,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:46:40,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:40,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:40,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:46:40,069 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:40,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1883651995, now seen corresponding path program 28 times [2024-06-21 21:46:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:40,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284778287] [2024-06-21 21:46:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:40,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:40,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284778287] [2024-06-21 21:46:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284778287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:40,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696373110] [2024-06-21 21:46:40,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:40,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:40,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:40,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:40,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 622 transitions, 8783 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:40,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:40,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:40,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:42,344 INFO L124 PetriNetUnfolderBase]: 3475/5355 cut-off events. [2024-06-21 21:46:42,344 INFO L125 PetriNetUnfolderBase]: For 425818/425824 co-relation queries the response was YES. [2024-06-21 21:46:42,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43582 conditions, 5355 events. 3475/5355 cut-off events. For 425818/425824 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30346 event pairs, 521 based on Foata normal form. 10/5364 useless extension candidates. Maximal degree in co-relation 43409. Up to 4822 conditions per place. [2024-06-21 21:46:42,430 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 528 selfloop transitions, 117 changer transitions 0/649 dead transitions. [2024-06-21 21:46:42,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 649 transitions, 10235 flow [2024-06-21 21:46:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:46:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:46:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:46:42,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:46:42,431 INFO L175 Difference]: Start difference. First operand has 400 places, 622 transitions, 8783 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:46:42,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 649 transitions, 10235 flow [2024-06-21 21:46:44,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 649 transitions, 9849 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:44,055 INFO L231 Difference]: Finished difference. Result has 403 places, 622 transitions, 8647 flow [2024-06-21 21:46:44,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8397, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8647, PETRI_PLACES=403, PETRI_TRANSITIONS=622} [2024-06-21 21:46:44,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-21 21:46:44,056 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 622 transitions, 8647 flow [2024-06-21 21:46:44,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:46:44,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:44,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:44,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:46:44,056 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:44,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1637455101, now seen corresponding path program 1 times [2024-06-21 21:46:44,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:44,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339603136] [2024-06-21 21:46:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:44,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339603136] [2024-06-21 21:46:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339603136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:44,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:44,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:46:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450637032] [2024-06-21 21:46:44,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:46:44,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:44,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:46:44,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:46:45,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:45,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 622 transitions, 8647 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:45,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:45,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:45,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:46,459 INFO L124 PetriNetUnfolderBase]: 3536/5417 cut-off events. [2024-06-21 21:46:46,460 INFO L125 PetriNetUnfolderBase]: For 470595/470595 co-relation queries the response was YES. [2024-06-21 21:46:46,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44485 conditions, 5417 events. 3536/5417 cut-off events. For 470595/470595 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 30335 event pairs, 591 based on Foata normal form. 8/5424 useless extension candidates. Maximal degree in co-relation 44311. Up to 4855 conditions per place. [2024-06-21 21:46:46,543 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 567 selfloop transitions, 99 changer transitions 0/670 dead transitions. [2024-06-21 21:46:46,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 670 transitions, 10633 flow [2024-06-21 21:46:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 21:46:46,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-21 21:46:46,544 INFO L175 Difference]: Start difference. First operand has 403 places, 622 transitions, 8647 flow. Second operand 10 states and 183 transitions. [2024-06-21 21:46:46,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 670 transitions, 10633 flow [2024-06-21 21:46:48,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 670 transitions, 10383 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:46:48,125 INFO L231 Difference]: Finished difference. Result has 406 places, 627 transitions, 8720 flow [2024-06-21 21:46:48,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8405, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8720, PETRI_PLACES=406, PETRI_TRANSITIONS=627} [2024-06-21 21:46:48,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 365 predicate places. [2024-06-21 21:46:48,126 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 627 transitions, 8720 flow [2024-06-21 21:46:48,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:48,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:48,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:48,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:46:48,126 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:48,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1635581151, now seen corresponding path program 2 times [2024-06-21 21:46:48,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:48,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877576325] [2024-06-21 21:46:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877576325] [2024-06-21 21:46:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877576325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:49,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:49,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:46:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789651416] [2024-06-21 21:46:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:46:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:46:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:46:49,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:49,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 627 transitions, 8720 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:49,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:49,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:49,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:50,702 INFO L124 PetriNetUnfolderBase]: 3633/5564 cut-off events. [2024-06-21 21:46:50,702 INFO L125 PetriNetUnfolderBase]: For 498746/498746 co-relation queries the response was YES. [2024-06-21 21:46:50,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46373 conditions, 5564 events. 3633/5564 cut-off events. For 498746/498746 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 31296 event pairs, 614 based on Foata normal form. 8/5571 useless extension candidates. Maximal degree in co-relation 46197. Up to 5106 conditions per place. [2024-06-21 21:46:50,777 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 564 selfloop transitions, 102 changer transitions 0/670 dead transitions. [2024-06-21 21:46:50,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 670 transitions, 10674 flow [2024-06-21 21:46:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:46:50,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-21 21:46:50,778 INFO L175 Difference]: Start difference. First operand has 406 places, 627 transitions, 8720 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:46:50,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 670 transitions, 10674 flow [2024-06-21 21:46:52,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 670 transitions, 10527 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:46:52,379 INFO L231 Difference]: Finished difference. Result has 412 places, 634 transitions, 8872 flow [2024-06-21 21:46:52,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8577, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8872, PETRI_PLACES=412, PETRI_TRANSITIONS=634} [2024-06-21 21:46:52,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-21 21:46:52,380 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 634 transitions, 8872 flow [2024-06-21 21:46:52,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:52,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:52,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:52,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:46:52,380 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:52,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2019746829, now seen corresponding path program 3 times [2024-06-21 21:46:52,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:52,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400915539] [2024-06-21 21:46:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:52,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:53,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400915539] [2024-06-21 21:46:53,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400915539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:53,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:53,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:46:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844771294] [2024-06-21 21:46:53,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:53,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:46:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:46:53,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:46:53,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:53,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 634 transitions, 8872 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:53,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:53,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:53,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:54,881 INFO L124 PetriNetUnfolderBase]: 3610/5531 cut-off events. [2024-06-21 21:46:54,881 INFO L125 PetriNetUnfolderBase]: For 479952/479952 co-relation queries the response was YES. [2024-06-21 21:46:54,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45672 conditions, 5531 events. 3610/5531 cut-off events. For 479952/479952 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 31127 event pairs, 613 based on Foata normal form. 10/5540 useless extension candidates. Maximal degree in co-relation 45493. Up to 5134 conditions per place. [2024-06-21 21:46:54,966 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 561 selfloop transitions, 101 changer transitions 0/666 dead transitions. [2024-06-21 21:46:54,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 666 transitions, 10550 flow [2024-06-21 21:46:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 21:46:54,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-21 21:46:54,967 INFO L175 Difference]: Start difference. First operand has 412 places, 634 transitions, 8872 flow. Second operand 10 states and 176 transitions. [2024-06-21 21:46:54,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 666 transitions, 10550 flow [2024-06-21 21:46:56,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 666 transitions, 10455 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:46:56,460 INFO L231 Difference]: Finished difference. Result has 418 places, 635 transitions, 9012 flow [2024-06-21 21:46:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8785, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9012, PETRI_PLACES=418, PETRI_TRANSITIONS=635} [2024-06-21 21:46:56,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-21 21:46:56,461 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 635 transitions, 9012 flow [2024-06-21 21:46:56,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:56,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:56,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:56,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:46:56,461 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:56,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2106434919, now seen corresponding path program 4 times [2024-06-21 21:46:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704488779] [2024-06-21 21:46:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:57,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704488779] [2024-06-21 21:46:57,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704488779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:57,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:57,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:46:57,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973986876] [2024-06-21 21:46:57,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:57,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:46:57,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:46:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:46:57,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:46:57,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 635 transitions, 9012 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:57,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:57,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:46:57,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:59,005 INFO L124 PetriNetUnfolderBase]: 3697/5664 cut-off events. [2024-06-21 21:46:59,005 INFO L125 PetriNetUnfolderBase]: For 521744/521744 co-relation queries the response was YES. [2024-06-21 21:46:59,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47839 conditions, 5664 events. 3697/5664 cut-off events. For 521744/521744 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31989 event pairs, 630 based on Foata normal form. 8/5671 useless extension candidates. Maximal degree in co-relation 47658. Up to 5286 conditions per place. [2024-06-21 21:46:59,097 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 598 selfloop transitions, 68 changer transitions 0/670 dead transitions. [2024-06-21 21:46:59,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 670 transitions, 10763 flow [2024-06-21 21:46:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 21:46:59,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-21 21:46:59,098 INFO L175 Difference]: Start difference. First operand has 418 places, 635 transitions, 9012 flow. Second operand 10 states and 176 transitions. [2024-06-21 21:46:59,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 670 transitions, 10763 flow [2024-06-21 21:47:01,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 670 transitions, 10566 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:47:01,156 INFO L231 Difference]: Finished difference. Result has 422 places, 638 transitions, 9021 flow [2024-06-21 21:47:01,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8815, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9021, PETRI_PLACES=422, PETRI_TRANSITIONS=638} [2024-06-21 21:47:01,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 21:47:01,156 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 638 transitions, 9021 flow [2024-06-21 21:47:01,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:01,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:01,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:01,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:47:01,157 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:01,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:01,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1548885621, now seen corresponding path program 5 times [2024-06-21 21:47:01,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:01,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082068019] [2024-06-21 21:47:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:01,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:02,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082068019] [2024-06-21 21:47:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082068019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:02,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:02,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444013487] [2024-06-21 21:47:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:02,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:02,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:02,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:02,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 638 transitions, 9021 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:02,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:02,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:02,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:03,691 INFO L124 PetriNetUnfolderBase]: 3743/5734 cut-off events. [2024-06-21 21:47:03,691 INFO L125 PetriNetUnfolderBase]: For 542477/542477 co-relation queries the response was YES. [2024-06-21 21:47:03,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48571 conditions, 5734 events. 3743/5734 cut-off events. For 542477/542477 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 32474 event pairs, 646 based on Foata normal form. 10/5743 useless extension candidates. Maximal degree in co-relation 48388. Up to 5413 conditions per place. [2024-06-21 21:47:03,778 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 596 selfloop transitions, 70 changer transitions 0/670 dead transitions. [2024-06-21 21:47:03,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 670 transitions, 10567 flow [2024-06-21 21:47:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 21:47:03,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 21:47:03,779 INFO L175 Difference]: Start difference. First operand has 422 places, 638 transitions, 9021 flow. Second operand 10 states and 173 transitions. [2024-06-21 21:47:03,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 670 transitions, 10567 flow [2024-06-21 21:47:05,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 670 transitions, 10431 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:47:05,823 INFO L231 Difference]: Finished difference. Result has 426 places, 642 transitions, 9094 flow [2024-06-21 21:47:05,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8890, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9094, PETRI_PLACES=426, PETRI_TRANSITIONS=642} [2024-06-21 21:47:05,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 21:47:05,823 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 642 transitions, 9094 flow [2024-06-21 21:47:05,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:05,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:05,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:05,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:47:05,824 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:05,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2106588741, now seen corresponding path program 1 times [2024-06-21 21:47:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:05,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126572397] [2024-06-21 21:47:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:05,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:06,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:06,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126572397] [2024-06-21 21:47:06,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126572397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:06,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:06,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:06,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250545914] [2024-06-21 21:47:06,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:06,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:06,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:06,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:06,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 642 transitions, 9094 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:06,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:06,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:06,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:08,429 INFO L124 PetriNetUnfolderBase]: 3751/5746 cut-off events. [2024-06-21 21:47:08,429 INFO L125 PetriNetUnfolderBase]: For 522505/522505 co-relation queries the response was YES. [2024-06-21 21:47:08,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48856 conditions, 5746 events. 3751/5746 cut-off events. For 522505/522505 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32589 event pairs, 647 based on Foata normal form. 2/5747 useless extension candidates. Maximal degree in co-relation 48671. Up to 5487 conditions per place. [2024-06-21 21:47:08,508 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 606 selfloop transitions, 55 changer transitions 0/665 dead transitions. [2024-06-21 21:47:08,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 665 transitions, 10534 flow [2024-06-21 21:47:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:47:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:47:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:47:08,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 21:47:08,509 INFO L175 Difference]: Start difference. First operand has 426 places, 642 transitions, 9094 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:47:08,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 665 transitions, 10534 flow [2024-06-21 21:47:10,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 665 transitions, 10391 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:47:10,594 INFO L231 Difference]: Finished difference. Result has 428 places, 644 transitions, 9114 flow [2024-06-21 21:47:10,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8951, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9114, PETRI_PLACES=428, PETRI_TRANSITIONS=644} [2024-06-21 21:47:10,595 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 21:47:10,595 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 644 transitions, 9114 flow [2024-06-21 21:47:10,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:10,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:10,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:47:10,596 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:10,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1548741471, now seen corresponding path program 6 times [2024-06-21 21:47:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419272601] [2024-06-21 21:47:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:11,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:11,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419272601] [2024-06-21 21:47:11,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419272601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:11,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:11,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:11,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365857544] [2024-06-21 21:47:11,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:11,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:11,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:11,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:11,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:11,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 644 transitions, 9114 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:11,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:11,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:11,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:13,169 INFO L124 PetriNetUnfolderBase]: 3748/5745 cut-off events. [2024-06-21 21:47:13,169 INFO L125 PetriNetUnfolderBase]: For 546910/546910 co-relation queries the response was YES. [2024-06-21 21:47:13,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48023 conditions, 5745 events. 3748/5745 cut-off events. For 546910/546910 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32606 event pairs, 642 based on Foata normal form. 16/5760 useless extension candidates. Maximal degree in co-relation 47837. Up to 5412 conditions per place. [2024-06-21 21:47:13,264 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 610 selfloop transitions, 59 changer transitions 0/673 dead transitions. [2024-06-21 21:47:13,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 673 transitions, 10648 flow [2024-06-21 21:47:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 21:47:13,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:47:13,265 INFO L175 Difference]: Start difference. First operand has 428 places, 644 transitions, 9114 flow. Second operand 10 states and 170 transitions. [2024-06-21 21:47:13,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 673 transitions, 10648 flow [2024-06-21 21:47:15,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 673 transitions, 10485 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:47:15,694 INFO L231 Difference]: Finished difference. Result has 431 places, 646 transitions, 9133 flow [2024-06-21 21:47:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8959, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9133, PETRI_PLACES=431, PETRI_TRANSITIONS=646} [2024-06-21 21:47:15,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-21 21:47:15,694 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 646 transitions, 9133 flow [2024-06-21 21:47:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:15,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:15,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:15,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:47:15,695 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:15,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1385497613, now seen corresponding path program 7 times [2024-06-21 21:47:15,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:15,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129189323] [2024-06-21 21:47:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:16,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:16,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129189323] [2024-06-21 21:47:16,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129189323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:16,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:16,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125687771] [2024-06-21 21:47:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:16,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:16,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:16,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:16,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:16,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 646 transitions, 9133 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:16,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:16,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:18,292 INFO L124 PetriNetUnfolderBase]: 3784/5805 cut-off events. [2024-06-21 21:47:18,292 INFO L125 PetriNetUnfolderBase]: For 535497/535497 co-relation queries the response was YES. [2024-06-21 21:47:18,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48537 conditions, 5805 events. 3784/5805 cut-off events. For 535497/535497 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33043 event pairs, 659 based on Foata normal form. 10/5814 useless extension candidates. Maximal degree in co-relation 48350. Up to 5518 conditions per place. [2024-06-21 21:47:18,386 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 616 selfloop transitions, 52 changer transitions 0/672 dead transitions. [2024-06-21 21:47:18,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 672 transitions, 10638 flow [2024-06-21 21:47:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:47:18,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-21 21:47:18,387 INFO L175 Difference]: Start difference. First operand has 431 places, 646 transitions, 9133 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:47:18,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 672 transitions, 10638 flow [2024-06-21 21:47:20,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 672 transitions, 10508 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:47:20,712 INFO L231 Difference]: Finished difference. Result has 433 places, 647 transitions, 9141 flow [2024-06-21 21:47:20,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9003, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9141, PETRI_PLACES=433, PETRI_TRANSITIONS=647} [2024-06-21 21:47:20,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-21 21:47:20,713 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 647 transitions, 9141 flow [2024-06-21 21:47:20,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:20,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:20,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:20,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:47:20,713 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:20,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1385493893, now seen corresponding path program 8 times [2024-06-21 21:47:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47373724] [2024-06-21 21:47:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:20,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:21,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:21,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47373724] [2024-06-21 21:47:21,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47373724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:21,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:21,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569705452] [2024-06-21 21:47:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:21,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:21,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 647 transitions, 9141 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:21,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:21,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:21,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:23,349 INFO L124 PetriNetUnfolderBase]: 3871/5938 cut-off events. [2024-06-21 21:47:23,349 INFO L125 PetriNetUnfolderBase]: For 582843/582843 co-relation queries the response was YES. [2024-06-21 21:47:23,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50661 conditions, 5938 events. 3871/5938 cut-off events. For 582843/582843 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33945 event pairs, 672 based on Foata normal form. 8/5945 useless extension candidates. Maximal degree in co-relation 50473. Up to 5542 conditions per place. [2024-06-21 21:47:23,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 621 selfloop transitions, 54 changer transitions 0/679 dead transitions. [2024-06-21 21:47:23,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 679 transitions, 10918 flow [2024-06-21 21:47:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 21:47:23,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 21:47:23,446 INFO L175 Difference]: Start difference. First operand has 433 places, 647 transitions, 9141 flow. Second operand 10 states and 172 transitions. [2024-06-21 21:47:23,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 679 transitions, 10918 flow [2024-06-21 21:47:25,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 679 transitions, 10805 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:47:25,637 INFO L231 Difference]: Finished difference. Result has 436 places, 650 transitions, 9219 flow [2024-06-21 21:47:25,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9219, PETRI_PLACES=436, PETRI_TRANSITIONS=650} [2024-06-21 21:47:25,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-21 21:47:25,637 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 650 transitions, 9219 flow [2024-06-21 21:47:25,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:25,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:25,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:25,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:47:25,638 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:25,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1391211905, now seen corresponding path program 2 times [2024-06-21 21:47:25,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:25,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988927423] [2024-06-21 21:47:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:25,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:26,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:26,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988927423] [2024-06-21 21:47:26,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988927423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:26,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:26,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:47:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082922131] [2024-06-21 21:47:26,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:26,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:47:26,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:47:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:47:26,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:26,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 650 transitions, 9219 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:26,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:26,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:26,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:28,528 INFO L124 PetriNetUnfolderBase]: 3879/5950 cut-off events. [2024-06-21 21:47:28,529 INFO L125 PetriNetUnfolderBase]: For 569084/569084 co-relation queries the response was YES. [2024-06-21 21:47:28,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50954 conditions, 5950 events. 3879/5950 cut-off events. For 569084/569084 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34055 event pairs, 685 based on Foata normal form. 2/5951 useless extension candidates. Maximal degree in co-relation 50764. Up to 5730 conditions per place. [2024-06-21 21:47:28,631 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 631 selfloop transitions, 38 changer transitions 0/673 dead transitions. [2024-06-21 21:47:28,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 673 transitions, 10683 flow [2024-06-21 21:47:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:47:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:47:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 21:47:28,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-21 21:47:28,632 INFO L175 Difference]: Start difference. First operand has 436 places, 650 transitions, 9219 flow. Second operand 11 states and 174 transitions. [2024-06-21 21:47:28,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 673 transitions, 10683 flow [2024-06-21 21:47:31,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 673 transitions, 10604 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:47:31,017 INFO L231 Difference]: Finished difference. Result has 441 places, 652 transitions, 9275 flow [2024-06-21 21:47:31,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9140, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9275, PETRI_PLACES=441, PETRI_TRANSITIONS=652} [2024-06-21 21:47:31,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 21:47:31,018 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 652 transitions, 9275 flow [2024-06-21 21:47:31,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:31,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:31,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:31,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:47:31,018 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:31,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2025290751, now seen corresponding path program 3 times [2024-06-21 21:47:31,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:31,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112533594] [2024-06-21 21:47:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:31,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:32,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112533594] [2024-06-21 21:47:32,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112533594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:32,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:32,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:47:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771727939] [2024-06-21 21:47:32,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:32,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:47:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:32,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:47:32,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:47:32,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:32,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 652 transitions, 9275 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:32,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:32,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:32,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:33,839 INFO L124 PetriNetUnfolderBase]: 3887/5962 cut-off events. [2024-06-21 21:47:33,840 INFO L125 PetriNetUnfolderBase]: For 580239/580239 co-relation queries the response was YES. [2024-06-21 21:47:33,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51196 conditions, 5962 events. 3887/5962 cut-off events. For 580239/580239 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34132 event pairs, 687 based on Foata normal form. 2/5963 useless extension candidates. Maximal degree in co-relation 51004. Up to 5742 conditions per place. [2024-06-21 21:47:33,937 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 632 selfloop transitions, 37 changer transitions 0/673 dead transitions. [2024-06-21 21:47:33,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 673 transitions, 10739 flow [2024-06-21 21:47:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:47:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:47:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:47:33,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:47:33,938 INFO L175 Difference]: Start difference. First operand has 441 places, 652 transitions, 9275 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:47:33,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 673 transitions, 10739 flow [2024-06-21 21:47:36,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 673 transitions, 10620 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 21:47:36,555 INFO L231 Difference]: Finished difference. Result has 441 places, 654 transitions, 9293 flow [2024-06-21 21:47:36,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9156, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9293, PETRI_PLACES=441, PETRI_TRANSITIONS=654} [2024-06-21 21:47:36,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 21:47:36,555 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 654 transitions, 9293 flow [2024-06-21 21:47:36,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:36,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:36,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:36,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:47:36,556 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:36,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2025284799, now seen corresponding path program 9 times [2024-06-21 21:47:36,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603358050] [2024-06-21 21:47:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:37,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603358050] [2024-06-21 21:47:37,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603358050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:37,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:37,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:37,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328145836] [2024-06-21 21:47:37,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:37,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:37,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:37,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:37,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:37,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 654 transitions, 9293 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:37,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:37,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:37,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:39,370 INFO L124 PetriNetUnfolderBase]: 3943/6050 cut-off events. [2024-06-21 21:47:39,370 INFO L125 PetriNetUnfolderBase]: For 654807/654807 co-relation queries the response was YES. [2024-06-21 21:47:39,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52085 conditions, 6050 events. 3943/6050 cut-off events. For 654807/654807 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34769 event pairs, 693 based on Foata normal form. 16/6065 useless extension candidates. Maximal degree in co-relation 51892. Up to 5756 conditions per place. [2024-06-21 21:47:39,459 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 636 selfloop transitions, 41 changer transitions 0/681 dead transitions. [2024-06-21 21:47:39,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 681 transitions, 10847 flow [2024-06-21 21:47:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 21:47:39,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 21:47:39,460 INFO L175 Difference]: Start difference. First operand has 441 places, 654 transitions, 9293 flow. Second operand 10 states and 168 transitions. [2024-06-21 21:47:39,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 681 transitions, 10847 flow [2024-06-21 21:47:42,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 681 transitions, 10726 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:47:42,311 INFO L231 Difference]: Finished difference. Result has 444 places, 656 transitions, 9324 flow [2024-06-21 21:47:42,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9172, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9324, PETRI_PLACES=444, PETRI_TRANSITIONS=656} [2024-06-21 21:47:42,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-21 21:47:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 656 transitions, 9324 flow [2024-06-21 21:47:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:42,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:42,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:47:42,312 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:42,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1391219345, now seen corresponding path program 4 times [2024-06-21 21:47:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:42,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296673219] [2024-06-21 21:47:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:42,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:43,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296673219] [2024-06-21 21:47:43,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296673219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:43,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:47:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329141283] [2024-06-21 21:47:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:43,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:47:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:47:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:47:43,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:43,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 656 transitions, 9324 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:43,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:43,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:43,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:45,405 INFO L124 PetriNetUnfolderBase]: 3951/6062 cut-off events. [2024-06-21 21:47:45,405 INFO L125 PetriNetUnfolderBase]: For 607066/607066 co-relation queries the response was YES. [2024-06-21 21:47:45,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52371 conditions, 6062 events. 3951/6062 cut-off events. For 607066/607066 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 34827 event pairs, 685 based on Foata normal form. 2/6063 useless extension candidates. Maximal degree in co-relation 52177. Up to 5822 conditions per place. [2024-06-21 21:47:45,488 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 631 selfloop transitions, 44 changer transitions 0/679 dead transitions. [2024-06-21 21:47:45,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 679 transitions, 10804 flow [2024-06-21 21:47:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:47:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:47:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 21:47:45,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-21 21:47:45,490 INFO L175 Difference]: Start difference. First operand has 444 places, 656 transitions, 9324 flow. Second operand 11 states and 174 transitions. [2024-06-21 21:47:45,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 679 transitions, 10804 flow [2024-06-21 21:47:48,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 679 transitions, 10704 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:47:48,497 INFO L231 Difference]: Finished difference. Result has 447 places, 658 transitions, 9381 flow [2024-06-21 21:47:48,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9224, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9381, PETRI_PLACES=447, PETRI_TRANSITIONS=658} [2024-06-21 21:47:48,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 21:47:48,498 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 658 transitions, 9381 flow [2024-06-21 21:47:48,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:48,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:48,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:48,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:47:48,498 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:48,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2030647179, now seen corresponding path program 10 times [2024-06-21 21:47:48,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:48,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805063957] [2024-06-21 21:47:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:49,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:49,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805063957] [2024-06-21 21:47:49,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805063957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:49,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:49,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:49,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187537290] [2024-06-21 21:47:49,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:49,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:49,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:49,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:49,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:49,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:49,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 658 transitions, 9381 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:49,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:49,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:49,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:51,303 INFO L124 PetriNetUnfolderBase]: 3948/6061 cut-off events. [2024-06-21 21:47:51,303 INFO L125 PetriNetUnfolderBase]: For 634546/634546 co-relation queries the response was YES. [2024-06-21 21:47:51,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51454 conditions, 6061 events. 3948/6061 cut-off events. For 634546/634546 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34884 event pairs, 688 based on Foata normal form. 16/6076 useless extension candidates. Maximal degree in co-relation 51259. Up to 5767 conditions per place. [2024-06-21 21:47:51,403 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 641 selfloop transitions, 42 changer transitions 0/687 dead transitions. [2024-06-21 21:47:51,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 687 transitions, 10957 flow [2024-06-21 21:47:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:47:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:47:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 21:47:51,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:47:51,404 INFO L175 Difference]: Start difference. First operand has 447 places, 658 transitions, 9381 flow. Second operand 12 states and 192 transitions. [2024-06-21 21:47:51,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 687 transitions, 10957 flow [2024-06-21 21:47:54,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 687 transitions, 10800 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 21:47:54,292 INFO L231 Difference]: Finished difference. Result has 450 places, 660 transitions, 9384 flow [2024-06-21 21:47:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9232, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9384, PETRI_PLACES=450, PETRI_TRANSITIONS=660} [2024-06-21 21:47:54,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-21 21:47:54,293 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 660 transitions, 9384 flow [2024-06-21 21:47:54,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:54,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:47:54,293 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:54,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash -834510045, now seen corresponding path program 5 times [2024-06-21 21:47:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439364142] [2024-06-21 21:47:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:55,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:55,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439364142] [2024-06-21 21:47:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439364142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:55,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:55,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:47:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034045887] [2024-06-21 21:47:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:55,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:47:55,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:47:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:47:55,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:47:55,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 660 transitions, 9384 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:55,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:55,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:47:55,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:57,037 INFO L124 PetriNetUnfolderBase]: 3956/6093 cut-off events. [2024-06-21 21:47:57,037 INFO L125 PetriNetUnfolderBase]: For 582385/582385 co-relation queries the response was YES. [2024-06-21 21:47:57,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51602 conditions, 6093 events. 3956/6093 cut-off events. For 582385/582385 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 35374 event pairs, 734 based on Foata normal form. 2/6094 useless extension candidates. Maximal degree in co-relation 51406. Up to 5845 conditions per place. [2024-06-21 21:47:57,138 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 639 selfloop transitions, 36 changer transitions 0/679 dead transitions. [2024-06-21 21:47:57,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 679 transitions, 10862 flow [2024-06-21 21:47:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:47:57,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:47:57,139 INFO L175 Difference]: Start difference. First operand has 450 places, 660 transitions, 9384 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:47:57,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 679 transitions, 10862 flow [2024-06-21 21:48:00,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 679 transitions, 10766 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 21:48:00,441 INFO L231 Difference]: Finished difference. Result has 449 places, 662 transitions, 9435 flow [2024-06-21 21:48:00,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9288, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9435, PETRI_PLACES=449, PETRI_TRANSITIONS=662} [2024-06-21 21:48:00,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-21 21:48:00,442 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 662 transitions, 9435 flow [2024-06-21 21:48:00,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:00,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:00,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:48:00,443 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:00,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1935458309, now seen corresponding path program 6 times [2024-06-21 21:48:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:00,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136004952] [2024-06-21 21:48:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:01,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:01,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136004952] [2024-06-21 21:48:01,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136004952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:01,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:01,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:01,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031963209] [2024-06-21 21:48:01,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:01,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:01,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:01,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:01,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 662 transitions, 9435 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:01,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:01,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:01,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:03,289 INFO L124 PetriNetUnfolderBase]: 3964/6105 cut-off events. [2024-06-21 21:48:03,289 INFO L125 PetriNetUnfolderBase]: For 592969/592969 co-relation queries the response was YES. [2024-06-21 21:48:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51786 conditions, 6105 events. 3964/6105 cut-off events. For 592969/592969 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35434 event pairs, 743 based on Foata normal form. 2/6106 useless extension candidates. Maximal degree in co-relation 51589. Up to 5901 conditions per place. [2024-06-21 21:48:03,389 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 654 selfloop transitions, 19 changer transitions 0/677 dead transitions. [2024-06-21 21:48:03,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 677 transitions, 10895 flow [2024-06-21 21:48:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:48:03,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 21:48:03,390 INFO L175 Difference]: Start difference. First operand has 449 places, 662 transitions, 9435 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:48:03,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 677 transitions, 10895 flow [2024-06-21 21:48:06,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 677 transitions, 10764 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:06,517 INFO L231 Difference]: Finished difference. Result has 451 places, 664 transitions, 9421 flow [2024-06-21 21:48:06,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9304, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9421, PETRI_PLACES=451, PETRI_TRANSITIONS=664} [2024-06-21 21:48:06,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-21 21:48:06,517 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 664 transitions, 9421 flow [2024-06-21 21:48:06,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:06,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:06,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:06,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:48:06,518 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:06,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:06,518 INFO L85 PathProgramCache]: Analyzing trace with hash -840074235, now seen corresponding path program 7 times [2024-06-21 21:48:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:06,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098542839] [2024-06-21 21:48:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:06,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:07,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098542839] [2024-06-21 21:48:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098542839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:07,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:07,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317935262] [2024-06-21 21:48:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:07,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:07,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:07,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:07,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 664 transitions, 9421 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:07,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:07,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:07,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:09,256 INFO L124 PetriNetUnfolderBase]: 3972/6117 cut-off events. [2024-06-21 21:48:09,257 INFO L125 PetriNetUnfolderBase]: For 604670/604670 co-relation queries the response was YES. [2024-06-21 21:48:09,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51982 conditions, 6117 events. 3972/6117 cut-off events. For 604670/604670 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35535 event pairs, 734 based on Foata normal form. 2/6118 useless extension candidates. Maximal degree in co-relation 51784. Up to 5869 conditions per place. [2024-06-21 21:48:09,351 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 644 selfloop transitions, 38 changer transitions 0/686 dead transitions. [2024-06-21 21:48:09,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 686 transitions, 10931 flow [2024-06-21 21:48:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:48:09,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 21:48:09,352 INFO L175 Difference]: Start difference. First operand has 451 places, 664 transitions, 9421 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:48:09,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 686 transitions, 10931 flow [2024-06-21 21:48:12,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 686 transitions, 10830 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:12,227 INFO L231 Difference]: Finished difference. Result has 453 places, 666 transitions, 9479 flow [2024-06-21 21:48:12,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9320, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9479, PETRI_PLACES=453, PETRI_TRANSITIONS=666} [2024-06-21 21:48:12,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-21 21:48:12,228 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 666 transitions, 9479 flow [2024-06-21 21:48:12,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:12,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:12,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:48:12,228 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:12,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:12,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1906922741, now seen corresponding path program 8 times [2024-06-21 21:48:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:12,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391203126] [2024-06-21 21:48:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:12,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:13,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:13,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391203126] [2024-06-21 21:48:13,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391203126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:13,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:13,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:13,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982636407] [2024-06-21 21:48:13,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:13,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:13,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:13,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:13,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 666 transitions, 9479 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:13,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:13,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:13,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:15,075 INFO L124 PetriNetUnfolderBase]: 3980/6129 cut-off events. [2024-06-21 21:48:15,075 INFO L125 PetriNetUnfolderBase]: For 616104/616104 co-relation queries the response was YES. [2024-06-21 21:48:15,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52293 conditions, 6129 events. 3980/6129 cut-off events. For 616104/616104 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35635 event pairs, 741 based on Foata normal form. 2/6130 useless extension candidates. Maximal degree in co-relation 52094. Up to 5911 conditions per place. [2024-06-21 21:48:15,167 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 655 selfloop transitions, 22 changer transitions 0/681 dead transitions. [2024-06-21 21:48:15,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 681 transitions, 10949 flow [2024-06-21 21:48:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:48:15,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:48:15,168 INFO L175 Difference]: Start difference. First operand has 453 places, 666 transitions, 9479 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:48:15,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 681 transitions, 10949 flow [2024-06-21 21:48:17,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 681 transitions, 10822 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:18,004 INFO L231 Difference]: Finished difference. Result has 456 places, 668 transitions, 9483 flow [2024-06-21 21:48:18,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9352, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9483, PETRI_PLACES=456, PETRI_TRANSITIONS=668} [2024-06-21 21:48:18,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 21:48:18,004 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 668 transitions, 9483 flow [2024-06-21 21:48:18,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:18,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:18,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:48:18,005 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:18,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2103008694, now seen corresponding path program 1 times [2024-06-21 21:48:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:18,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208333791] [2024-06-21 21:48:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208333791] [2024-06-21 21:48:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208333791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:19,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:19,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279950021] [2024-06-21 21:48:19,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:19,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:19,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:19,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:19,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 668 transitions, 9483 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:19,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:19,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:19,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:20,946 INFO L124 PetriNetUnfolderBase]: 3977/6125 cut-off events. [2024-06-21 21:48:20,946 INFO L125 PetriNetUnfolderBase]: For 616321/616321 co-relation queries the response was YES. [2024-06-21 21:48:21,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52190 conditions, 6125 events. 3977/6125 cut-off events. For 616321/616321 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35589 event pairs, 739 based on Foata normal form. 1/6125 useless extension candidates. Maximal degree in co-relation 51990. Up to 5907 conditions per place. [2024-06-21 21:48:21,037 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 646 selfloop transitions, 31 changer transitions 0/681 dead transitions. [2024-06-21 21:48:21,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 681 transitions, 10887 flow [2024-06-21 21:48:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 21:48:21,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 21:48:21,038 INFO L175 Difference]: Start difference. First operand has 456 places, 668 transitions, 9483 flow. Second operand 8 states and 129 transitions. [2024-06-21 21:48:21,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 681 transitions, 10887 flow [2024-06-21 21:48:24,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 681 transitions, 10756 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:24,074 INFO L231 Difference]: Finished difference. Result has 459 places, 668 transitions, 9424 flow [2024-06-21 21:48:24,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9352, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9424, PETRI_PLACES=459, PETRI_TRANSITIONS=668} [2024-06-21 21:48:24,075 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 21:48:24,075 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 668 transitions, 9424 flow [2024-06-21 21:48:24,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:24,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:24,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:24,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:48:24,075 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:24,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2103008477, now seen corresponding path program 9 times [2024-06-21 21:48:24,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:24,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412835545] [2024-06-21 21:48:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:24,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:25,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:25,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412835545] [2024-06-21 21:48:25,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412835545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:25,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:25,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:48:25,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099230525] [2024-06-21 21:48:25,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:25,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:48:25,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:48:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:48:25,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:25,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 668 transitions, 9424 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:25,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:25,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:25,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:26,973 INFO L124 PetriNetUnfolderBase]: 3985/6137 cut-off events. [2024-06-21 21:48:26,973 INFO L125 PetriNetUnfolderBase]: For 632913/632913 co-relation queries the response was YES. [2024-06-21 21:48:27,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52336 conditions, 6137 events. 3985/6137 cut-off events. For 632913/632913 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35652 event pairs, 747 based on Foata normal form. 2/6138 useless extension candidates. Maximal degree in co-relation 52135. Up to 5918 conditions per place. [2024-06-21 21:48:27,077 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 650 selfloop transitions, 29 changer transitions 0/683 dead transitions. [2024-06-21 21:48:27,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 683 transitions, 10908 flow [2024-06-21 21:48:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:48:27,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:48:27,078 INFO L175 Difference]: Start difference. First operand has 459 places, 668 transitions, 9424 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:48:27,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 683 transitions, 10908 flow [2024-06-21 21:48:30,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 683 transitions, 10848 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:30,229 INFO L231 Difference]: Finished difference. Result has 461 places, 670 transitions, 9516 flow [2024-06-21 21:48:30,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9364, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9516, PETRI_PLACES=461, PETRI_TRANSITIONS=670} [2024-06-21 21:48:30,229 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 420 predicate places. [2024-06-21 21:48:30,229 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 670 transitions, 9516 flow [2024-06-21 21:48:30,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:30,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:30,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:30,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:48:30,230 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:30,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash -840224337, now seen corresponding path program 11 times [2024-06-21 21:48:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114736312] [2024-06-21 21:48:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114736312] [2024-06-21 21:48:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114736312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:31,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:31,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:31,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889089500] [2024-06-21 21:48:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:31,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:31,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:31,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 670 transitions, 9516 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:31,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:31,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:31,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:32,996 INFO L124 PetriNetUnfolderBase]: 4021/6193 cut-off events. [2024-06-21 21:48:32,996 INFO L125 PetriNetUnfolderBase]: For 689115/689115 co-relation queries the response was YES. [2024-06-21 21:48:33,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53066 conditions, 6193 events. 4021/6193 cut-off events. For 689115/689115 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 36045 event pairs, 739 based on Foata normal form. 10/6202 useless extension candidates. Maximal degree in co-relation 52864. Up to 5855 conditions per place. [2024-06-21 21:48:33,098 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 632 selfloop transitions, 64 changer transitions 0/700 dead transitions. [2024-06-21 21:48:33,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 700 transitions, 11091 flow [2024-06-21 21:48:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:48:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:48:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:48:33,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:48:33,099 INFO L175 Difference]: Start difference. First operand has 461 places, 670 transitions, 9516 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:48:33,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 700 transitions, 11091 flow [2024-06-21 21:48:36,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 700 transitions, 10959 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:36,269 INFO L231 Difference]: Finished difference. Result has 464 places, 671 transitions, 9550 flow [2024-06-21 21:48:36,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9384, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9550, PETRI_PLACES=464, PETRI_TRANSITIONS=671} [2024-06-21 21:48:36,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-21 21:48:36,270 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 671 transitions, 9550 flow [2024-06-21 21:48:36,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:36,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:36,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:36,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:48:36,271 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)] === [2024-06-21 21:48:36,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1935250547, now seen corresponding path program 12 times [2024-06-21 21:48:36,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:36,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502680258] [2024-06-21 21:48:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:37,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502680258] [2024-06-21 21:48:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502680258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:37,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:37,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:48:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312292066] [2024-06-21 21:48:37,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:37,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:48:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:48:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:48:37,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:37,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 671 transitions, 9550 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:37,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:37,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:37,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:39,335 INFO L124 PetriNetUnfolderBase]: 4077/6281 cut-off events. [2024-06-21 21:48:39,336 INFO L125 PetriNetUnfolderBase]: For 723803/723803 co-relation queries the response was YES. [2024-06-21 21:48:39,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53910 conditions, 6281 events. 4077/6281 cut-off events. For 723803/723803 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36657 event pairs, 759 based on Foata normal form. 16/6296 useless extension candidates. Maximal degree in co-relation 53707. Up to 6003 conditions per place. [2024-06-21 21:48:39,446 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 665 selfloop transitions, 23 changer transitions 0/692 dead transitions. [2024-06-21 21:48:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 692 transitions, 11117 flow [2024-06-21 21:48:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:48:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:48:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:48:39,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 21:48:39,447 INFO L175 Difference]: Start difference. First operand has 464 places, 671 transitions, 9550 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:48:39,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 692 transitions, 11117 flow [2024-06-21 21:48:42,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 692 transitions, 10999 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:42,583 INFO L231 Difference]: Finished difference. Result has 467 places, 673 transitions, 9567 flow [2024-06-21 21:48:42,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9432, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9567, PETRI_PLACES=467, PETRI_TRANSITIONS=673} [2024-06-21 21:48:42,584 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-21 21:48:42,584 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 673 transitions, 9567 flow [2024-06-21 21:48:42,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:42,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:42,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:42,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:48:42,584 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)] === [2024-06-21 21:48:42,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash 557428495, now seen corresponding path program 10 times [2024-06-21 21:48:42,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:42,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478669001] [2024-06-21 21:48:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:42,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:43,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:43,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478669001] [2024-06-21 21:48:43,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478669001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:43,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:43,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:43,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901224985] [2024-06-21 21:48:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:43,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:43,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:43,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:43,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 673 transitions, 9567 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:43,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:43,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:43,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:45,332 INFO L124 PetriNetUnfolderBase]: 4085/6293 cut-off events. [2024-06-21 21:48:45,332 INFO L125 PetriNetUnfolderBase]: For 662837/662837 co-relation queries the response was YES. [2024-06-21 21:48:45,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54056 conditions, 6293 events. 4085/6293 cut-off events. For 662837/662837 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36811 event pairs, 763 based on Foata normal form. 2/6294 useless extension candidates. Maximal degree in co-relation 53852. Up to 6046 conditions per place. [2024-06-21 21:48:45,446 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 649 selfloop transitions, 35 changer transitions 0/688 dead transitions. [2024-06-21 21:48:45,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 688 transitions, 11057 flow [2024-06-21 21:48:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 21:48:45,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 21:48:45,447 INFO L175 Difference]: Start difference. First operand has 467 places, 673 transitions, 9567 flow. Second operand 8 states and 129 transitions. [2024-06-21 21:48:45,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 688 transitions, 11057 flow [2024-06-21 21:48:48,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 688 transitions, 10975 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:48,512 INFO L231 Difference]: Finished difference. Result has 469 places, 675 transitions, 9651 flow [2024-06-21 21:48:48,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9485, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9651, PETRI_PLACES=469, PETRI_TRANSITIONS=675} [2024-06-21 21:48:48,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 428 predicate places. [2024-06-21 21:48:48,513 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 675 transitions, 9651 flow [2024-06-21 21:48:48,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:48,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:48,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:48,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:48:48,514 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)] === [2024-06-21 21:48:48,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash 557687965, now seen corresponding path program 11 times [2024-06-21 21:48:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:48,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218322002] [2024-06-21 21:48:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:48,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:49,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:49,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218322002] [2024-06-21 21:48:49,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218322002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:49,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:48:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468369551] [2024-06-21 21:48:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:48:49,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:48:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:48:49,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:49,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 675 transitions, 9651 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:49,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:49,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:49,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:51,383 INFO L124 PetriNetUnfolderBase]: 4093/6305 cut-off events. [2024-06-21 21:48:51,384 INFO L125 PetriNetUnfolderBase]: For 672475/672475 co-relation queries the response was YES. [2024-06-21 21:48:51,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54138 conditions, 6305 events. 4093/6305 cut-off events. For 672475/672475 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36790 event pairs, 769 based on Foata normal form. 2/6306 useless extension candidates. Maximal degree in co-relation 53933. Up to 6096 conditions per place. [2024-06-21 21:48:51,479 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 667 selfloop transitions, 19 changer transitions 0/690 dead transitions. [2024-06-21 21:48:51,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 690 transitions, 11143 flow [2024-06-21 21:48:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 21:48:51,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 21:48:51,480 INFO L175 Difference]: Start difference. First operand has 469 places, 675 transitions, 9651 flow. Second operand 8 states and 126 transitions. [2024-06-21 21:48:51,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 690 transitions, 11143 flow [2024-06-21 21:48:54,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 690 transitions, 10989 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 21:48:54,869 INFO L231 Difference]: Finished difference. Result has 470 places, 677 transitions, 9632 flow [2024-06-21 21:48:54,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9501, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9632, PETRI_PLACES=470, PETRI_TRANSITIONS=677} [2024-06-21 21:48:54,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-21 21:48:54,869 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 677 transitions, 9632 flow [2024-06-21 21:48:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:54,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:54,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:48:54,870 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)] === [2024-06-21 21:48:54,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1707257879, now seen corresponding path program 13 times [2024-06-21 21:48:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:54,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047908458] [2024-06-21 21:48:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:54,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:55,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047908458] [2024-06-21 21:48:55,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047908458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:55,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:55,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:55,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160248893] [2024-06-21 21:48:55,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:55,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:55,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:55,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:55,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:55,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:48:55,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 677 transitions, 9632 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:55,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:55,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:48:55,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:57,619 INFO L124 PetriNetUnfolderBase]: 4121/6349 cut-off events. [2024-06-21 21:48:57,619 INFO L125 PetriNetUnfolderBase]: For 706609/706609 co-relation queries the response was YES. [2024-06-21 21:48:57,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54369 conditions, 6349 events. 4121/6349 cut-off events. For 706609/706609 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 37113 event pairs, 739 based on Foata normal form. 8/6356 useless extension candidates. Maximal degree in co-relation 54163. Up to 5838 conditions per place. [2024-06-21 21:48:57,727 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 643 selfloop transitions, 68 changer transitions 0/715 dead transitions. [2024-06-21 21:48:57,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 715 transitions, 11506 flow [2024-06-21 21:48:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:48:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:48:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:48:57,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-21 21:48:57,728 INFO L175 Difference]: Start difference. First operand has 470 places, 677 transitions, 9632 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:48:57,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 715 transitions, 11506 flow [2024-06-21 21:49:00,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 715 transitions, 11391 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:00,392 INFO L231 Difference]: Finished difference. Result has 474 places, 679 transitions, 9718 flow [2024-06-21 21:49:00,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9517, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9718, PETRI_PLACES=474, PETRI_TRANSITIONS=679} [2024-06-21 21:49:00,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-21 21:49:00,392 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 679 transitions, 9718 flow [2024-06-21 21:49:00,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:00,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:00,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:00,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:49:00,393 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)] === [2024-06-21 21:49:00,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1707405749, now seen corresponding path program 14 times [2024-06-21 21:49:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:00,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146325987] [2024-06-21 21:49:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:00,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:01,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:01,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146325987] [2024-06-21 21:49:01,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146325987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:01,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:01,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:01,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282835393] [2024-06-21 21:49:01,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:01,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:01,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:01,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:01,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:01,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:01,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 679 transitions, 9718 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:01,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:01,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:01,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:03,350 INFO L124 PetriNetUnfolderBase]: 4177/6437 cut-off events. [2024-06-21 21:49:03,351 INFO L125 PetriNetUnfolderBase]: For 768097/768097 co-relation queries the response was YES. [2024-06-21 21:49:03,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55641 conditions, 6437 events. 4177/6437 cut-off events. For 768097/768097 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 37782 event pairs, 780 based on Foata normal form. 16/6452 useless extension candidates. Maximal degree in co-relation 55433. Up to 6115 conditions per place. [2024-06-21 21:49:03,458 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 661 selfloop transitions, 42 changer transitions 0/707 dead transitions. [2024-06-21 21:49:03,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 707 transitions, 11352 flow [2024-06-21 21:49:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:49:03,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 21:49:03,459 INFO L175 Difference]: Start difference. First operand has 474 places, 679 transitions, 9718 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:49:03,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 707 transitions, 11352 flow [2024-06-21 21:49:07,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 707 transitions, 10990 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 21:49:07,247 INFO L231 Difference]: Finished difference. Result has 473 places, 681 transitions, 9538 flow [2024-06-21 21:49:07,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9364, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9538, PETRI_PLACES=473, PETRI_TRANSITIONS=681} [2024-06-21 21:49:07,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-21 21:49:07,247 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 681 transitions, 9538 flow [2024-06-21 21:49:07,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:07,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:07,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:07,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:49:07,248 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)] === [2024-06-21 21:49:07,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash -834502605, now seen corresponding path program 12 times [2024-06-21 21:49:07,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:07,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058354098] [2024-06-21 21:49:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:08,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058354098] [2024-06-21 21:49:08,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058354098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:08,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:08,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:08,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918143546] [2024-06-21 21:49:08,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:08,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:08,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:08,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:08,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:08,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 681 transitions, 9538 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:08,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:08,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:08,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:10,184 INFO L124 PetriNetUnfolderBase]: 4172/6430 cut-off events. [2024-06-21 21:49:10,184 INFO L125 PetriNetUnfolderBase]: For 685289/685289 co-relation queries the response was YES. [2024-06-21 21:49:10,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54350 conditions, 6430 events. 4172/6430 cut-off events. For 685289/685289 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 37763 event pairs, 777 based on Foata normal form. 2/6431 useless extension candidates. Maximal degree in co-relation 54144. Up to 6162 conditions per place. [2024-06-21 21:49:10,284 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 655 selfloop transitions, 41 changer transitions 0/700 dead transitions. [2024-06-21 21:49:10,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 700 transitions, 11076 flow [2024-06-21 21:49:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:49:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:49:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:49:10,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:49:10,285 INFO L175 Difference]: Start difference. First operand has 473 places, 681 transitions, 9538 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:49:10,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 700 transitions, 11076 flow [2024-06-21 21:49:13,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 700 transitions, 10952 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 21:49:13,713 INFO L231 Difference]: Finished difference. Result has 474 places, 683 transitions, 9595 flow [2024-06-21 21:49:13,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9414, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9595, PETRI_PLACES=474, PETRI_TRANSITIONS=683} [2024-06-21 21:49:13,714 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-21 21:49:13,715 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 683 transitions, 9595 flow [2024-06-21 21:49:13,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:13,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:13,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:13,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 21:49:13,715 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)] === [2024-06-21 21:49:13,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash -834717807, now seen corresponding path program 15 times [2024-06-21 21:49:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:13,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769514697] [2024-06-21 21:49:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:13,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:14,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769514697] [2024-06-21 21:49:14,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769514697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:14,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:14,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:49:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509719845] [2024-06-21 21:49:14,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:49:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:49:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:49:15,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:15,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 683 transitions, 9595 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:15,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:15,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:15,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:16,813 INFO L124 PetriNetUnfolderBase]: 4215/6499 cut-off events. [2024-06-21 21:49:16,813 INFO L125 PetriNetUnfolderBase]: For 767854/767854 co-relation queries the response was YES. [2024-06-21 21:49:16,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54757 conditions, 6499 events. 4215/6499 cut-off events. For 767854/767854 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 38237 event pairs, 788 based on Foata normal form. 16/6514 useless extension candidates. Maximal degree in co-relation 54550. Up to 6177 conditions per place. [2024-06-21 21:49:17,174 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 664 selfloop transitions, 40 changer transitions 0/708 dead transitions. [2024-06-21 21:49:17,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 708 transitions, 11219 flow [2024-06-21 21:49:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:49:17,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 21:49:17,175 INFO L175 Difference]: Start difference. First operand has 474 places, 683 transitions, 9595 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:49:17,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 708 transitions, 11219 flow [2024-06-21 21:49:20,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 708 transitions, 11056 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:20,484 INFO L231 Difference]: Finished difference. Result has 477 places, 685 transitions, 9608 flow [2024-06-21 21:49:20,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9432, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9608, PETRI_PLACES=477, PETRI_TRANSITIONS=685} [2024-06-21 21:49:20,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-21 21:49:20,485 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 685 transitions, 9608 flow [2024-06-21 21:49:20,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:20,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:20,485 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] [2024-06-21 21:49:20,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 21:49:20,485 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)] === [2024-06-21 21:49:20,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1029623974, now seen corresponding path program 1 times [2024-06-21 21:49:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820325585] [2024-06-21 21:49:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:21,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:21,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820325585] [2024-06-21 21:49:21,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820325585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:21,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:21,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121033209] [2024-06-21 21:49:21,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:21,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:21,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:21,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:21,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 685 transitions, 9608 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:21,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:21,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:21,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:23,548 INFO L124 PetriNetUnfolderBase]: 4228/6520 cut-off events. [2024-06-21 21:49:23,549 INFO L125 PetriNetUnfolderBase]: For 697350/697350 co-relation queries the response was YES. [2024-06-21 21:49:23,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55138 conditions, 6520 events. 4228/6520 cut-off events. For 697350/697350 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 38355 event pairs, 772 based on Foata normal form. 1/6520 useless extension candidates. Maximal degree in co-relation 54931. Up to 5674 conditions per place. [2024-06-21 21:49:23,657 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 445 selfloop transitions, 263 changer transitions 0/712 dead transitions. [2024-06-21 21:49:23,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 712 transitions, 11476 flow [2024-06-21 21:49:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:49:23,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 21:49:23,658 INFO L175 Difference]: Start difference. First operand has 477 places, 685 transitions, 9608 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:49:23,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 712 transitions, 11476 flow [2024-06-21 21:49:27,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 712 transitions, 11350 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 21:49:27,200 INFO L231 Difference]: Finished difference. Result has 479 places, 691 transitions, 10218 flow [2024-06-21 21:49:27,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9482, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10218, PETRI_PLACES=479, PETRI_TRANSITIONS=691} [2024-06-21 21:49:27,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 438 predicate places. [2024-06-21 21:49:27,201 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 691 transitions, 10218 flow [2024-06-21 21:49:27,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:27,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:27,201 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] [2024-06-21 21:49:27,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 21:49:27,201 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)] === [2024-06-21 21:49:27,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2037407415, now seen corresponding path program 1 times [2024-06-21 21:49:27,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:27,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414419634] [2024-06-21 21:49:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:28,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:28,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414419634] [2024-06-21 21:49:28,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414419634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:28,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:28,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:28,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960358225] [2024-06-21 21:49:28,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:28,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:28,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:28,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:28,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:28,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:28,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 691 transitions, 10218 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:28,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:28,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:28,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:30,109 INFO L124 PetriNetUnfolderBase]: 4254/6551 cut-off events. [2024-06-21 21:49:30,110 INFO L125 PetriNetUnfolderBase]: For 730373/730373 co-relation queries the response was YES. [2024-06-21 21:49:30,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56588 conditions, 6551 events. 4254/6551 cut-off events. For 730373/730373 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 38504 event pairs, 688 based on Foata normal form. 2/6552 useless extension candidates. Maximal degree in co-relation 56380. Up to 5617 conditions per place. [2024-06-21 21:49:30,223 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 500 selfloop transitions, 224 changer transitions 0/728 dead transitions. [2024-06-21 21:49:30,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 728 transitions, 12288 flow [2024-06-21 21:49:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:49:30,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 21:49:30,224 INFO L175 Difference]: Start difference. First operand has 479 places, 691 transitions, 10218 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:49:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 728 transitions, 12288 flow [2024-06-21 21:49:33,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 728 transitions, 11914 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:33,965 INFO L231 Difference]: Finished difference. Result has 482 places, 697 transitions, 10543 flow [2024-06-21 21:49:33,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9846, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10543, PETRI_PLACES=482, PETRI_TRANSITIONS=697} [2024-06-21 21:49:33,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-21 21:49:33,966 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 697 transitions, 10543 flow [2024-06-21 21:49:33,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:33,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:33,966 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] [2024-06-21 21:49:33,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 21:49:33,967 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)] === [2024-06-21 21:49:33,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:33,967 INFO L85 PathProgramCache]: Analyzing trace with hash 112487995, now seen corresponding path program 2 times [2024-06-21 21:49:33,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:33,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204446773] [2024-06-21 21:49:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204446773] [2024-06-21 21:49:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204446773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:35,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:35,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:35,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354980222] [2024-06-21 21:49:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:35,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:35,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:35,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 697 transitions, 10543 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:35,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:35,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:35,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:37,231 INFO L124 PetriNetUnfolderBase]: 4280/6585 cut-off events. [2024-06-21 21:49:37,232 INFO L125 PetriNetUnfolderBase]: For 751387/751387 co-relation queries the response was YES. [2024-06-21 21:49:37,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58223 conditions, 6585 events. 4280/6585 cut-off events. For 751387/751387 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 38675 event pairs, 689 based on Foata normal form. 2/6586 useless extension candidates. Maximal degree in co-relation 58014. Up to 5860 conditions per place. [2024-06-21 21:49:37,337 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 538 selfloop transitions, 191 changer transitions 0/733 dead transitions. [2024-06-21 21:49:37,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 733 transitions, 12639 flow [2024-06-21 21:49:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:49:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:49:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 21:49:37,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-21 21:49:37,338 INFO L175 Difference]: Start difference. First operand has 482 places, 697 transitions, 10543 flow. Second operand 11 states and 191 transitions. [2024-06-21 21:49:37,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 733 transitions, 12639 flow [2024-06-21 21:49:40,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 733 transitions, 12303 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:40,847 INFO L231 Difference]: Finished difference. Result has 487 places, 703 transitions, 10855 flow [2024-06-21 21:49:40,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10229, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10855, PETRI_PLACES=487, PETRI_TRANSITIONS=703} [2024-06-21 21:49:40,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-21 21:49:40,848 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 703 transitions, 10855 flow [2024-06-21 21:49:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:40,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:40,848 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] [2024-06-21 21:49:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 21:49:40,849 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)] === [2024-06-21 21:49:40,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1635004198, now seen corresponding path program 2 times [2024-06-21 21:49:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:40,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342218378] [2024-06-21 21:49:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:42,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342218378] [2024-06-21 21:49:42,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342218378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:42,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:42,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:42,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418979405] [2024-06-21 21:49:42,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:42,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:42,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:42,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:42,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 703 transitions, 10855 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:42,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:42,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:42,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:44,091 INFO L124 PetriNetUnfolderBase]: 4285/6598 cut-off events. [2024-06-21 21:49:44,091 INFO L125 PetriNetUnfolderBase]: For 744743/744743 co-relation queries the response was YES. [2024-06-21 21:49:44,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58634 conditions, 6598 events. 4285/6598 cut-off events. For 744743/744743 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 38864 event pairs, 772 based on Foata normal form. 1/6598 useless extension candidates. Maximal degree in co-relation 58424. Up to 6158 conditions per place. [2024-06-21 21:49:44,193 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 595 selfloop transitions, 120 changer transitions 0/719 dead transitions. [2024-06-21 21:49:44,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 719 transitions, 12395 flow [2024-06-21 21:49:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:49:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:49:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:49:44,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 21:49:44,194 INFO L175 Difference]: Start difference. First operand has 487 places, 703 transitions, 10855 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:49:44,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 719 transitions, 12395 flow [2024-06-21 21:49:47,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 719 transitions, 12046 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 21:49:47,305 INFO L231 Difference]: Finished difference. Result has 487 places, 706 transitions, 10843 flow [2024-06-21 21:49:47,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10506, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10843, PETRI_PLACES=487, PETRI_TRANSITIONS=706} [2024-06-21 21:49:47,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-21 21:49:47,306 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 706 transitions, 10843 flow [2024-06-21 21:49:47,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:47,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:47,306 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] [2024-06-21 21:49:47,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 21:49:47,306 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)] === [2024-06-21 21:49:47,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1635004353, now seen corresponding path program 3 times [2024-06-21 21:49:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:47,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341836962] [2024-06-21 21:49:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:47,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:48,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341836962] [2024-06-21 21:49:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341836962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:48,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:48,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:48,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350054385] [2024-06-21 21:49:48,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:48,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:48,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:48,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:48,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 706 transitions, 10843 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:48,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:48,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:48,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:50,673 INFO L124 PetriNetUnfolderBase]: 4279/6592 cut-off events. [2024-06-21 21:49:50,673 INFO L125 PetriNetUnfolderBase]: For 735486/735486 co-relation queries the response was YES. [2024-06-21 21:49:50,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58295 conditions, 6592 events. 4279/6592 cut-off events. For 735486/735486 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 38837 event pairs, 684 based on Foata normal form. 2/6593 useless extension candidates. Maximal degree in co-relation 58084. Up to 5862 conditions per place. [2024-06-21 21:49:50,777 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 543 selfloop transitions, 186 changer transitions 0/733 dead transitions. [2024-06-21 21:49:50,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 733 transitions, 12479 flow [2024-06-21 21:49:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:49:50,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:49:50,778 INFO L175 Difference]: Start difference. First operand has 487 places, 706 transitions, 10843 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:49:50,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 733 transitions, 12479 flow [2024-06-21 21:49:54,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 733 transitions, 12165 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-21 21:49:54,088 INFO L231 Difference]: Finished difference. Result has 492 places, 706 transitions, 10925 flow [2024-06-21 21:49:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10533, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10925, PETRI_PLACES=492, PETRI_TRANSITIONS=706} [2024-06-21 21:49:54,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-21 21:49:54,089 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 706 transitions, 10925 flow [2024-06-21 21:49:54,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:54,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:54,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:54,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 21:49:54,089 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:54,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1918727087, now seen corresponding path program 4 times [2024-06-21 21:49:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:54,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292728081] [2024-06-21 21:49:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292728081] [2024-06-21 21:49:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292728081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:55,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:49:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803391177] [2024-06-21 21:49:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:55,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:49:55,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:49:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:49:55,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:49:55,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 706 transitions, 10925 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:55,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:55,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:49:55,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:57,056 INFO L124 PetriNetUnfolderBase]: 4305/6636 cut-off events. [2024-06-21 21:49:57,056 INFO L125 PetriNetUnfolderBase]: For 762834/762834 co-relation queries the response was YES. [2024-06-21 21:49:57,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59384 conditions, 6636 events. 4305/6636 cut-off events. For 762834/762834 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39187 event pairs, 754 based on Foata normal form. 2/6637 useless extension candidates. Maximal degree in co-relation 59172. Up to 5908 conditions per place. [2024-06-21 21:49:57,172 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 577 selfloop transitions, 156 changer transitions 0/737 dead transitions. [2024-06-21 21:49:57,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 737 transitions, 13217 flow [2024-06-21 21:49:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:49:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:49:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:49:57,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 21:49:57,173 INFO L175 Difference]: Start difference. First operand has 492 places, 706 transitions, 10925 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:49:57,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 737 transitions, 13217 flow [2024-06-21 21:50:00,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 737 transitions, 12825 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:50:00,881 INFO L231 Difference]: Finished difference. Result has 491 places, 712 transitions, 11096 flow [2024-06-21 21:50:00,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10537, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11096, PETRI_PLACES=491, PETRI_TRANSITIONS=712} [2024-06-21 21:50:00,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 450 predicate places. [2024-06-21 21:50:00,882 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 712 transitions, 11096 flow [2024-06-21 21:50:00,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:00,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:00,882 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] [2024-06-21 21:50:00,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 21:50:00,882 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:00,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1873213498, now seen corresponding path program 3 times [2024-06-21 21:50:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:00,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086590300] [2024-06-21 21:50:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:02,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086590300] [2024-06-21 21:50:02,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086590300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:02,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:02,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:50:02,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464200992] [2024-06-21 21:50:02,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:02,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:50:02,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:50:02,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:50:02,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:02,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 712 transitions, 11096 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:02,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:02,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:02,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:04,145 INFO L124 PetriNetUnfolderBase]: 4302/6622 cut-off events. [2024-06-21 21:50:04,145 INFO L125 PetriNetUnfolderBase]: For 749828/749828 co-relation queries the response was YES. [2024-06-21 21:50:04,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59117 conditions, 6622 events. 4302/6622 cut-off events. For 749828/749828 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 38973 event pairs, 774 based on Foata normal form. 1/6622 useless extension candidates. Maximal degree in co-relation 58905. Up to 5970 conditions per place. [2024-06-21 21:50:04,260 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 560 selfloop transitions, 166 changer transitions 0/730 dead transitions. [2024-06-21 21:50:04,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 730 transitions, 12602 flow [2024-06-21 21:50:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:50:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:50:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:50:04,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 21:50:04,261 INFO L175 Difference]: Start difference. First operand has 491 places, 712 transitions, 11096 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:50:04,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 730 transitions, 12602 flow [2024-06-21 21:50:07,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 730 transitions, 12293 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 21:50:07,653 INFO L231 Difference]: Finished difference. Result has 493 places, 712 transitions, 11162 flow [2024-06-21 21:50:07,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10787, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11162, PETRI_PLACES=493, PETRI_TRANSITIONS=712} [2024-06-21 21:50:07,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-21 21:50:07,654 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 712 transitions, 11162 flow [2024-06-21 21:50:07,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:07,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:07,654 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] [2024-06-21 21:50:07,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 21:50:07,654 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:07,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1873213653, now seen corresponding path program 5 times [2024-06-21 21:50:07,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:07,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144409227] [2024-06-21 21:50:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:07,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:08,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:08,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144409227] [2024-06-21 21:50:08,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144409227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:08,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:08,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:50:08,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599364258] [2024-06-21 21:50:08,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:08,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:50:08,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:08,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:50:08,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:50:08,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:08,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 712 transitions, 11162 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:08,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:08,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:08,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:10,673 INFO L124 PetriNetUnfolderBase]: 4296/6624 cut-off events. [2024-06-21 21:50:10,673 INFO L125 PetriNetUnfolderBase]: For 743237/743237 co-relation queries the response was YES. [2024-06-21 21:50:10,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58728 conditions, 6624 events. 4296/6624 cut-off events. For 743237/743237 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39187 event pairs, 740 based on Foata normal form. 2/6625 useless extension candidates. Maximal degree in co-relation 58516. Up to 5899 conditions per place. [2024-06-21 21:50:10,791 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 566 selfloop transitions, 169 changer transitions 0/739 dead transitions. [2024-06-21 21:50:10,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 739 transitions, 13010 flow [2024-06-21 21:50:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:50:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:50:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:50:10,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-21 21:50:10,792 INFO L175 Difference]: Start difference. First operand has 493 places, 712 transitions, 11162 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:50:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 739 transitions, 13010 flow [2024-06-21 21:50:14,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 739 transitions, 12559 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 21:50:14,989 INFO L231 Difference]: Finished difference. Result has 494 places, 712 transitions, 11065 flow [2024-06-21 21:50:14,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10711, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11065, PETRI_PLACES=494, PETRI_TRANSITIONS=712} [2024-06-21 21:50:14,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 453 predicate places. [2024-06-21 21:50:14,989 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 712 transitions, 11065 flow [2024-06-21 21:50:14,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:14,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:14,990 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] [2024-06-21 21:50:14,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 21:50:14,990 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:14,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1880570883, now seen corresponding path program 6 times [2024-06-21 21:50:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:14,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796545064] [2024-06-21 21:50:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:14,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796545064] [2024-06-21 21:50:15,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796545064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:15,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:15,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:50:15,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54557526] [2024-06-21 21:50:15,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:15,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:50:15,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:50:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:50:16,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:16,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 712 transitions, 11065 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:16,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:16,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:16,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:17,966 INFO L124 PetriNetUnfolderBase]: 4290/6606 cut-off events. [2024-06-21 21:50:17,967 INFO L125 PetriNetUnfolderBase]: For 740201/740201 co-relation queries the response was YES. [2024-06-21 21:50:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58414 conditions, 6606 events. 4290/6606 cut-off events. For 740201/740201 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 38907 event pairs, 754 based on Foata normal form. 2/6607 useless extension candidates. Maximal degree in co-relation 58201. Up to 6215 conditions per place. [2024-06-21 21:50:18,076 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 644 selfloop transitions, 77 changer transitions 0/725 dead transitions. [2024-06-21 21:50:18,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 725 transitions, 12575 flow [2024-06-21 21:50:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:50:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:50:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:50:18,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:50:18,077 INFO L175 Difference]: Start difference. First operand has 494 places, 712 transitions, 11065 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:50:18,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 725 transitions, 12575 flow [2024-06-21 21:50:22,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 725 transitions, 11992 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 21:50:22,281 INFO L231 Difference]: Finished difference. Result has 493 places, 712 transitions, 10651 flow [2024-06-21 21:50:22,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10482, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10651, PETRI_PLACES=493, PETRI_TRANSITIONS=712} [2024-06-21 21:50:22,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-21 21:50:22,282 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 712 transitions, 10651 flow [2024-06-21 21:50:22,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:22,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:22,282 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] [2024-06-21 21:50:22,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 21:50:22,282 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:22,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1761988714, now seen corresponding path program 4 times [2024-06-21 21:50:22,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:22,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268736093] [2024-06-21 21:50:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:22,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:23,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:23,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268736093] [2024-06-21 21:50:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268736093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:23,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:23,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:50:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839415985] [2024-06-21 21:50:23,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:23,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:50:23,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:50:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:50:23,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:23,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 712 transitions, 10651 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:23,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:23,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:25,318 INFO L124 PetriNetUnfolderBase]: 4295/6615 cut-off events. [2024-06-21 21:50:25,318 INFO L125 PetriNetUnfolderBase]: For 731837/731837 co-relation queries the response was YES. [2024-06-21 21:50:25,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57626 conditions, 6615 events. 4295/6615 cut-off events. For 731837/731837 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 38978 event pairs, 774 based on Foata normal form. 1/6615 useless extension candidates. Maximal degree in co-relation 57414. Up to 5746 conditions per place. [2024-06-21 21:50:25,423 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 477 selfloop transitions, 261 changer transitions 0/742 dead transitions. [2024-06-21 21:50:25,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 742 transitions, 12611 flow [2024-06-21 21:50:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:50:25,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 21:50:25,424 INFO L175 Difference]: Start difference. First operand has 493 places, 712 transitions, 10651 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:50:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 742 transitions, 12611 flow [2024-06-21 21:50:28,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 742 transitions, 12443 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:50:28,688 INFO L231 Difference]: Finished difference. Result has 496 places, 718 transitions, 11207 flow [2024-06-21 21:50:28,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10485, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11207, PETRI_PLACES=496, PETRI_TRANSITIONS=718} [2024-06-21 21:50:28,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-21 21:50:28,689 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 718 transitions, 11207 flow [2024-06-21 21:50:28,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:28,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:28,689 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] [2024-06-21 21:50:28,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 21:50:28,689 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:28,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:28,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1716779762, now seen corresponding path program 1 times [2024-06-21 21:50:28,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:28,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897314557] [2024-06-21 21:50:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:28,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:29,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:29,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897314557] [2024-06-21 21:50:29,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897314557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:29,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:29,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:50:29,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346205862] [2024-06-21 21:50:29,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:29,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:50:29,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:29,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:50:29,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:50:29,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:29,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 718 transitions, 11207 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:29,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:29,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:29,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:32,039 INFO L124 PetriNetUnfolderBase]: 4409/6774 cut-off events. [2024-06-21 21:50:32,040 INFO L125 PetriNetUnfolderBase]: For 783748/783754 co-relation queries the response was YES. [2024-06-21 21:50:32,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60465 conditions, 6774 events. 4409/6774 cut-off events. For 783748/783754 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 39931 event pairs, 658 based on Foata normal form. 10/6783 useless extension candidates. Maximal degree in co-relation 60253. Up to 5811 conditions per place. [2024-06-21 21:50:32,142 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 561 selfloop transitions, 231 changer transitions 0/796 dead transitions. [2024-06-21 21:50:32,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 796 transitions, 13916 flow [2024-06-21 21:50:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:50:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:50:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 214 transitions. [2024-06-21 21:50:32,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-21 21:50:32,143 INFO L175 Difference]: Start difference. First operand has 496 places, 718 transitions, 11207 flow. Second operand 12 states and 214 transitions. [2024-06-21 21:50:32,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 796 transitions, 13916 flow [2024-06-21 21:50:36,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 796 transitions, 13214 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-21 21:50:36,389 INFO L231 Difference]: Finished difference. Result has 504 places, 752 transitions, 11782 flow [2024-06-21 21:50:36,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10569, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11782, PETRI_PLACES=504, PETRI_TRANSITIONS=752} [2024-06-21 21:50:36,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-21 21:50:36,389 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 752 transitions, 11782 flow [2024-06-21 21:50:36,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:36,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:36,390 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] [2024-06-21 21:50:36,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 21:50:36,390 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:36,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:36,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1670319212, now seen corresponding path program 5 times [2024-06-21 21:50:36,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:36,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930389572] [2024-06-21 21:50:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:36,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:37,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:37,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930389572] [2024-06-21 21:50:37,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930389572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:37,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:37,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:50:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266979906] [2024-06-21 21:50:37,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:37,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:50:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:50:37,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:50:37,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:37,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 752 transitions, 11782 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:37,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:37,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:37,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:39,668 INFO L124 PetriNetUnfolderBase]: 4419/6791 cut-off events. [2024-06-21 21:50:39,668 INFO L125 PetriNetUnfolderBase]: For 780524/780524 co-relation queries the response was YES. [2024-06-21 21:50:39,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61479 conditions, 6791 events. 4419/6791 cut-off events. For 780524/780524 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 40016 event pairs, 779 based on Foata normal form. 1/6791 useless extension candidates. Maximal degree in co-relation 61264. Up to 5885 conditions per place. [2024-06-21 21:50:39,772 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 486 selfloop transitions, 289 changer transitions 0/779 dead transitions. [2024-06-21 21:50:39,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 779 transitions, 13715 flow [2024-06-21 21:50:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:50:39,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 21:50:39,773 INFO L175 Difference]: Start difference. First operand has 504 places, 752 transitions, 11782 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:50:39,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 779 transitions, 13715 flow [2024-06-21 21:50:43,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 779 transitions, 13355 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-21 21:50:43,928 INFO L231 Difference]: Finished difference. Result has 505 places, 758 transitions, 12104 flow [2024-06-21 21:50:43,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11424, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12104, PETRI_PLACES=505, PETRI_TRANSITIONS=758} [2024-06-21 21:50:43,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-21 21:50:43,929 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 758 transitions, 12104 flow [2024-06-21 21:50:43,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:43,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:43,930 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] [2024-06-21 21:50:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 21:50:43,930 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:43,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1719575900, now seen corresponding path program 6 times [2024-06-21 21:50:43,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732472391] [2024-06-21 21:50:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:45,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:45,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732472391] [2024-06-21 21:50:45,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732472391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:45,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:45,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:50:45,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122964465] [2024-06-21 21:50:45,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:45,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:50:45,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:50:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:50:45,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:45,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 758 transitions, 12104 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:45,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:45,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:45,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:47,035 INFO L124 PetriNetUnfolderBase]: 4439/6830 cut-off events. [2024-06-21 21:50:47,035 INFO L125 PetriNetUnfolderBase]: For 778551/778557 co-relation queries the response was YES. [2024-06-21 21:50:47,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61990 conditions, 6830 events. 4439/6830 cut-off events. For 778551/778557 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 40449 event pairs, 760 based on Foata normal form. 7/6836 useless extension candidates. Maximal degree in co-relation 61774. Up to 6240 conditions per place. [2024-06-21 21:50:47,165 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 603 selfloop transitions, 182 changer transitions 0/789 dead transitions. [2024-06-21 21:50:47,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 789 transitions, 13930 flow [2024-06-21 21:50:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:50:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:50:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 21:50:47,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 21:50:47,167 INFO L175 Difference]: Start difference. First operand has 505 places, 758 transitions, 12104 flow. Second operand 10 states and 168 transitions. [2024-06-21 21:50:47,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 789 transitions, 13930 flow [2024-06-21 21:50:51,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 789 transitions, 13406 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 21:50:51,635 INFO L231 Difference]: Finished difference. Result has 510 places, 770 transitions, 12157 flow [2024-06-21 21:50:51,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11598, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12157, PETRI_PLACES=510, PETRI_TRANSITIONS=770} [2024-06-21 21:50:51,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 469 predicate places. [2024-06-21 21:50:51,636 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 770 transitions, 12157 flow [2024-06-21 21:50:51,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:51,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:51,637 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] [2024-06-21 21:50:51,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 21:50:51,637 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:51,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:51,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1835052016, now seen corresponding path program 1 times [2024-06-21 21:50:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:51,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964573594] [2024-06-21 21:50:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:51,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:52,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:52,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964573594] [2024-06-21 21:50:52,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964573594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:52,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:52,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:50:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172324085] [2024-06-21 21:50:52,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:52,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:50:52,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:50:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:50:52,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:52,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 770 transitions, 12157 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:52,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:52,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:52,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:54,779 INFO L124 PetriNetUnfolderBase]: 4483/6903 cut-off events. [2024-06-21 21:50:54,779 INFO L125 PetriNetUnfolderBase]: For 863913/863913 co-relation queries the response was YES. [2024-06-21 21:50:54,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62525 conditions, 6903 events. 4483/6903 cut-off events. For 863913/863913 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 41047 event pairs, 701 based on Foata normal form. 12/6914 useless extension candidates. Maximal degree in co-relation 62308. Up to 6231 conditions per place. [2024-06-21 21:50:54,897 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 648 selfloop transitions, 146 changer transitions 0/798 dead transitions. [2024-06-21 21:50:54,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 798 transitions, 14000 flow [2024-06-21 21:50:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:50:54,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:50:54,898 INFO L175 Difference]: Start difference. First operand has 510 places, 770 transitions, 12157 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:50:54,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 798 transitions, 14000 flow [2024-06-21 21:50:58,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 798 transitions, 13619 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 21:50:58,598 INFO L231 Difference]: Finished difference. Result has 513 places, 771 transitions, 12110 flow [2024-06-21 21:50:58,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11776, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12110, PETRI_PLACES=513, PETRI_TRANSITIONS=771} [2024-06-21 21:50:58,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 472 predicate places. [2024-06-21 21:50:58,598 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 771 transitions, 12110 flow [2024-06-21 21:50:58,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:58,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:58,599 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] [2024-06-21 21:50:58,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 21:50:58,599 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:58,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1591100184, now seen corresponding path program 2 times [2024-06-21 21:50:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:58,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921761772] [2024-06-21 21:50:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:59,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:59,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921761772] [2024-06-21 21:50:59,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921761772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:59,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:59,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:50:59,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816781924] [2024-06-21 21:50:59,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:59,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:50:59,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:59,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:50:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:50:59,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:50:59,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 771 transitions, 12110 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:59,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:59,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:50:59,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:01,914 INFO L124 PetriNetUnfolderBase]: 4503/6932 cut-off events. [2024-06-21 21:51:01,914 INFO L125 PetriNetUnfolderBase]: For 827562/827568 co-relation queries the response was YES. [2024-06-21 21:51:02,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62971 conditions, 6932 events. 4503/6932 cut-off events. For 827562/827568 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 41292 event pairs, 692 based on Foata normal form. 10/6941 useless extension candidates. Maximal degree in co-relation 62753. Up to 6353 conditions per place. [2024-06-21 21:51:02,037 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 676 selfloop transitions, 124 changer transitions 0/804 dead transitions. [2024-06-21 21:51:02,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 804 transitions, 13996 flow [2024-06-21 21:51:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:51:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:51:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 21:51:02,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:51:02,038 INFO L175 Difference]: Start difference. First operand has 513 places, 771 transitions, 12110 flow. Second operand 10 states and 175 transitions. [2024-06-21 21:51:02,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 804 transitions, 13996 flow [2024-06-21 21:51:06,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 804 transitions, 13706 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:51:06,342 INFO L231 Difference]: Finished difference. Result has 516 places, 775 transitions, 12182 flow [2024-06-21 21:51:06,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11820, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12182, PETRI_PLACES=516, PETRI_TRANSITIONS=775} [2024-06-21 21:51:06,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-21 21:51:06,343 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 775 transitions, 12182 flow [2024-06-21 21:51:06,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:06,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:06,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:06,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 21:51:06,343 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:06,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1788406892, now seen corresponding path program 7 times [2024-06-21 21:51:06,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:06,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167214849] [2024-06-21 21:51:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:06,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167214849] [2024-06-21 21:51:07,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167214849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:07,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:07,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:51:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246843441] [2024-06-21 21:51:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:07,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:51:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:51:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:51:07,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:51:07,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 775 transitions, 12182 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:07,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:07,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:51:07,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:09,684 INFO L124 PetriNetUnfolderBase]: 4528/6971 cut-off events. [2024-06-21 21:51:09,684 INFO L125 PetriNetUnfolderBase]: For 818681/818687 co-relation queries the response was YES. [2024-06-21 21:51:09,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63384 conditions, 6971 events. 4528/6971 cut-off events. For 818681/818687 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 41547 event pairs, 774 based on Foata normal form. 7/6977 useless extension candidates. Maximal degree in co-relation 63165. Up to 6521 conditions per place. [2024-06-21 21:51:09,807 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 674 selfloop transitions, 128 changer transitions 0/806 dead transitions. [2024-06-21 21:51:09,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 806 transitions, 14097 flow [2024-06-21 21:51:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:51:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:51:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 21:51:09,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 21:51:09,809 INFO L175 Difference]: Start difference. First operand has 516 places, 775 transitions, 12182 flow. Second operand 10 states and 164 transitions. [2024-06-21 21:51:09,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 806 transitions, 14097 flow [2024-06-21 21:51:15,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 806 transitions, 13781 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 21:51:15,010 INFO L231 Difference]: Finished difference. Result has 518 places, 790 transitions, 12400 flow [2024-06-21 21:51:15,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11878, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12400, PETRI_PLACES=518, PETRI_TRANSITIONS=790} [2024-06-21 21:51:15,010 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 477 predicate places. [2024-06-21 21:51:15,010 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 790 transitions, 12400 flow [2024-06-21 21:51:15,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:15,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:15,011 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] [2024-06-21 21:51:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 21:51:15,011 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:15,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1637387382, now seen corresponding path program 3 times [2024-06-21 21:51:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:15,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551001902] [2024-06-21 21:51:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:16,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:16,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551001902] [2024-06-21 21:51:16,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551001902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:16,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:16,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:51:16,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260155834] [2024-06-21 21:51:16,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:16,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:51:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:51:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:51:16,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:51:16,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 790 transitions, 12400 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:16,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:16,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:51:16,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:18,343 INFO L124 PetriNetUnfolderBase]: 4538/6987 cut-off events. [2024-06-21 21:51:18,344 INFO L125 PetriNetUnfolderBase]: For 835714/835720 co-relation queries the response was YES. [2024-06-21 21:51:18,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63384 conditions, 6987 events. 4538/6987 cut-off events. For 835714/835720 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 41737 event pairs, 684 based on Foata normal form. 8/6994 useless extension candidates. Maximal degree in co-relation 63164. Up to 6544 conditions per place. [2024-06-21 21:51:18,462 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 734 selfloop transitions, 111 changer transitions 0/849 dead transitions. [2024-06-21 21:51:18,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 849 transitions, 14774 flow [2024-06-21 21:51:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:51:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:51:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-21 21:51:18,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41041666666666665 [2024-06-21 21:51:18,464 INFO L175 Difference]: Start difference. First operand has 518 places, 790 transitions, 12400 flow. Second operand 12 states and 197 transitions. [2024-06-21 21:51:18,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 849 transitions, 14774 flow [2024-06-21 21:51:23,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 849 transitions, 14499 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 21:51:23,742 INFO L231 Difference]: Finished difference. Result has 531 places, 826 transitions, 13131 flow [2024-06-21 21:51:23,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12125, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13131, PETRI_PLACES=531, PETRI_TRANSITIONS=826} [2024-06-21 21:51:23,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-21 21:51:23,743 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 826 transitions, 13131 flow [2024-06-21 21:51:23,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:23,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:23,743 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] [2024-06-21 21:51:23,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 21:51:23,743 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:23,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1788407264, now seen corresponding path program 4 times [2024-06-21 21:51:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:23,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362288750] [2024-06-21 21:51:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:23,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:24,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:24,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362288750] [2024-06-21 21:51:24,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362288750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:24,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:24,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:51:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178475213] [2024-06-21 21:51:24,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:24,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:51:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:51:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:51:24,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:51:24,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 826 transitions, 13131 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:24,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:24,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:51:24,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:27,095 INFO L124 PetriNetUnfolderBase]: 4574/7033 cut-off events. [2024-06-21 21:51:27,095 INFO L125 PetriNetUnfolderBase]: For 881226/881232 co-relation queries the response was YES. [2024-06-21 21:51:27,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64921 conditions, 7033 events. 4574/7033 cut-off events. For 881226/881232 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 41878 event pairs, 676 based on Foata normal form. 10/7042 useless extension candidates. Maximal degree in co-relation 64693. Up to 6376 conditions per place. [2024-06-21 21:51:27,224 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 681 selfloop transitions, 175 changer transitions 0/860 dead transitions. [2024-06-21 21:51:27,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 860 transitions, 15422 flow [2024-06-21 21:51:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:51:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:51:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 21:51:27,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 21:51:27,226 INFO L175 Difference]: Start difference. First operand has 531 places, 826 transitions, 13131 flow. Second operand 11 states and 193 transitions. [2024-06-21 21:51:27,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 860 transitions, 15422 flow [2024-06-21 21:51:32,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 860 transitions, 15276 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-21 21:51:32,014 INFO L231 Difference]: Finished difference. Result has 540 places, 835 transitions, 13631 flow [2024-06-21 21:51:32,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12993, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13631, PETRI_PLACES=540, PETRI_TRANSITIONS=835} [2024-06-21 21:51:32,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 499 predicate places. [2024-06-21 21:51:32,015 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 835 transitions, 13631 flow [2024-06-21 21:51:32,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:32,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:32,015 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] [2024-06-21 21:51:32,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 21:51:32,015 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:32,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:32,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1993889020, now seen corresponding path program 2 times [2024-06-21 21:51:32,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:32,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613253563] [2024-06-21 21:51:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:32,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:32,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613253563] [2024-06-21 21:51:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613253563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:32,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:32,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:51:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185860915] [2024-06-21 21:51:32,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:32,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:51:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:51:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:51:33,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:51:33,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 835 transitions, 13631 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:33,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:33,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:51:33,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:35,267 INFO L124 PetriNetUnfolderBase]: 4654/7159 cut-off events. [2024-06-21 21:51:35,267 INFO L125 PetriNetUnfolderBase]: For 956884/956890 co-relation queries the response was YES. [2024-06-21 21:51:35,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66535 conditions, 7159 events. 4654/7159 cut-off events. For 956884/956890 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42835 event pairs, 692 based on Foata normal form. 18/7176 useless extension candidates. Maximal degree in co-relation 66304. Up to 6581 conditions per place. [2024-06-21 21:51:35,400 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 752 selfloop transitions, 105 changer transitions 0/861 dead transitions. [2024-06-21 21:51:35,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 861 transitions, 15593 flow [2024-06-21 21:51:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:51:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:51:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:51:35,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 21:51:35,401 INFO L175 Difference]: Start difference. First operand has 540 places, 835 transitions, 13631 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:51:35,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 861 transitions, 15593 flow [2024-06-21 21:51:39,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 861 transitions, 15330 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 21:51:40,009 INFO L231 Difference]: Finished difference. Result has 540 places, 837 transitions, 13656 flow [2024-06-21 21:51:40,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13368, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13656, PETRI_PLACES=540, PETRI_TRANSITIONS=837} [2024-06-21 21:51:40,010 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 499 predicate places. [2024-06-21 21:51:40,010 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 837 transitions, 13656 flow [2024-06-21 21:51:40,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:40,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:40,010 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] [2024-06-21 21:51:40,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 21:51:40,010 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:40,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2064902916, now seen corresponding path program 3 times [2024-06-21 21:51:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:40,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682083480] [2024-06-21 21:51:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:41,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682083480] [2024-06-21 21:51:41,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682083480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:41,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:51:41,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3166878] [2024-06-21 21:51:41,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:41,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:51:41,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:51:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:51:41,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:51:41,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 837 transitions, 13656 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:41,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:41,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:51:41,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:43,430 INFO L124 PetriNetUnfolderBase]: 4698/7240 cut-off events. [2024-06-21 21:51:43,431 INFO L125 PetriNetUnfolderBase]: For 959623/959623 co-relation queries the response was YES. [2024-06-21 21:51:43,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67425 conditions, 7240 events. 4698/7240 cut-off events. For 959623/959623 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 43581 event pairs, 808 based on Foata normal form. 12/7251 useless extension candidates. Maximal degree in co-relation 67193. Up to 6747 conditions per place. [2024-06-21 21:51:43,567 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 762 selfloop transitions, 89 changer transitions 0/855 dead transitions. [2024-06-21 21:51:43,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 855 transitions, 15547 flow [2024-06-21 21:51:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:51:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:51:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:51:43,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:51:43,568 INFO L175 Difference]: Start difference. First operand has 540 places, 837 transitions, 13656 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:51:43,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 855 transitions, 15547 flow [2024-06-21 21:51:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 855 transitions, 15349 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:51:49,260 INFO L231 Difference]: Finished difference. Result has 541 places, 838 transitions, 13690 flow [2024-06-21 21:51:49,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13458, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13690, PETRI_PLACES=541, PETRI_TRANSITIONS=838} [2024-06-21 21:51:49,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 500 predicate places. [2024-06-21 21:51:49,261 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 838 transitions, 13690 flow [2024-06-21 21:51:49,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:49,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:49,261 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] [2024-06-21 21:51:49,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 21:51:49,261 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:49,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1993704446, now seen corresponding path program 5 times [2024-06-21 21:51:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:49,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425523046] [2024-06-21 21:51:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:50,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:50,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425523046] [2024-06-21 21:51:50,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425523046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:50,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:50,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:51:50,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414491021] [2024-06-21 21:51:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:50,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:51:50,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:50,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:51:50,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:51:50,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:51:50,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 838 transitions, 13690 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:50,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:50,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:51:50,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:52,560 INFO L124 PetriNetUnfolderBase]: 4724/7259 cut-off events. [2024-06-21 21:51:52,560 INFO L125 PetriNetUnfolderBase]: For 917457/917463 co-relation queries the response was YES. [2024-06-21 21:51:52,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68125 conditions, 7259 events. 4724/7259 cut-off events. For 917457/917463 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 43435 event pairs, 758 based on Foata normal form. 8/7266 useless extension candidates. Maximal degree in co-relation 67892. Up to 6743 conditions per place. [2024-06-21 21:51:52,694 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 749 selfloop transitions, 132 changer transitions 0/885 dead transitions. [2024-06-21 21:51:52,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 885 transitions, 16486 flow [2024-06-21 21:51:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:51:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:51:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:51:52,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-21 21:51:52,695 INFO L175 Difference]: Start difference. First operand has 541 places, 838 transitions, 13690 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:51:52,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 885 transitions, 16486 flow [2024-06-21 21:51:57,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 885 transitions, 16345 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:51:57,181 INFO L231 Difference]: Finished difference. Result has 548 places, 858 transitions, 14389 flow [2024-06-21 21:51:57,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13549, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14389, PETRI_PLACES=548, PETRI_TRANSITIONS=858} [2024-06-21 21:51:57,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 507 predicate places. [2024-06-21 21:51:57,182 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 858 transitions, 14389 flow [2024-06-21 21:51:57,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:57,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:57,182 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] [2024-06-21 21:51:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 21:51:57,182 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:57,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1432090200, now seen corresponding path program 6 times [2024-06-21 21:51:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:57,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255529265] [2024-06-21 21:51:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:58,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:58,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255529265] [2024-06-21 21:51:58,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255529265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:58,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:58,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:51:58,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306892707] [2024-06-21 21:51:58,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:58,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:51:58,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:51:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:51:58,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:51:58,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 858 transitions, 14389 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:58,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:58,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:51:58,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:00,653 INFO L124 PetriNetUnfolderBase]: 4744/7281 cut-off events. [2024-06-21 21:52:00,654 INFO L125 PetriNetUnfolderBase]: For 952585/952591 co-relation queries the response was YES. [2024-06-21 21:52:00,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69565 conditions, 7281 events. 4744/7281 cut-off events. For 952585/952591 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 43585 event pairs, 774 based on Foata normal form. 10/7290 useless extension candidates. Maximal degree in co-relation 69329. Up to 6723 conditions per place. [2024-06-21 21:52:00,788 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 767 selfloop transitions, 117 changer transitions 0/888 dead transitions. [2024-06-21 21:52:00,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 888 transitions, 16519 flow [2024-06-21 21:52:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:52:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:52:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:52:00,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:52:00,789 INFO L175 Difference]: Start difference. First operand has 548 places, 858 transitions, 14389 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:52:00,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 888 transitions, 16519 flow [2024-06-21 21:52:05,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 888 transitions, 16317 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 21:52:05,114 INFO L231 Difference]: Finished difference. Result has 552 places, 864 transitions, 14654 flow [2024-06-21 21:52:05,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14211, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14654, PETRI_PLACES=552, PETRI_TRANSITIONS=864} [2024-06-21 21:52:05,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 511 predicate places. [2024-06-21 21:52:05,115 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 864 transitions, 14654 flow [2024-06-21 21:52:05,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:05,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:05,115 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] [2024-06-21 21:52:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 21:52:05,115 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:05,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1993709096, now seen corresponding path program 7 times [2024-06-21 21:52:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947411366] [2024-06-21 21:52:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:06,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:06,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947411366] [2024-06-21 21:52:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947411366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:06,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:06,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:52:06,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100223090] [2024-06-21 21:52:06,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:06,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:52:06,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:52:06,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:52:06,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:52:06,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 864 transitions, 14654 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:06,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:06,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:52:06,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:08,627 INFO L124 PetriNetUnfolderBase]: 4764/7325 cut-off events. [2024-06-21 21:52:08,627 INFO L125 PetriNetUnfolderBase]: For 955785/955791 co-relation queries the response was YES. [2024-06-21 21:52:08,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70141 conditions, 7325 events. 4764/7325 cut-off events. For 955785/955791 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 44003 event pairs, 774 based on Foata normal form. 10/7334 useless extension candidates. Maximal degree in co-relation 69904. Up to 6751 conditions per place. [2024-06-21 21:52:08,777 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 762 selfloop transitions, 129 changer transitions 0/895 dead transitions. [2024-06-21 21:52:08,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 895 transitions, 16765 flow [2024-06-21 21:52:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:52:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:52:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:52:08,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:52:08,778 INFO L175 Difference]: Start difference. First operand has 552 places, 864 transitions, 14654 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:52:08,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 895 transitions, 16765 flow [2024-06-21 21:52:13,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 895 transitions, 16423 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 21:52:13,893 INFO L231 Difference]: Finished difference. Result has 554 places, 870 transitions, 14791 flow [2024-06-21 21:52:13,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14312, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14791, PETRI_PLACES=554, PETRI_TRANSITIONS=870} [2024-06-21 21:52:13,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 513 predicate places. [2024-06-21 21:52:13,894 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 870 transitions, 14791 flow [2024-06-21 21:52:13,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:13,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:13,894 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] [2024-06-21 21:52:13,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 21:52:13,894 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:13,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1297668270, now seen corresponding path program 8 times [2024-06-21 21:52:13,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:13,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21559057] [2024-06-21 21:52:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:13,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:15,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:15,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21559057] [2024-06-21 21:52:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21559057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:15,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:15,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:52:15,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853302131] [2024-06-21 21:52:15,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:15,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:52:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:52:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:52:15,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:52:15,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 870 transitions, 14791 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:15,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:15,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:52:15,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:17,470 INFO L124 PetriNetUnfolderBase]: 4771/7335 cut-off events. [2024-06-21 21:52:17,470 INFO L125 PetriNetUnfolderBase]: For 936800/936806 co-relation queries the response was YES. [2024-06-21 21:52:17,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70157 conditions, 7335 events. 4771/7335 cut-off events. For 936800/936806 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 44019 event pairs, 816 based on Foata normal form. 7/7341 useless extension candidates. Maximal degree in co-relation 69919. Up to 6763 conditions per place. [2024-06-21 21:52:17,610 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 763 selfloop transitions, 136 changer transitions 0/903 dead transitions. [2024-06-21 21:52:17,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 903 transitions, 16798 flow [2024-06-21 21:52:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:52:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:52:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:52:17,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:52:17,611 INFO L175 Difference]: Start difference. First operand has 554 places, 870 transitions, 14791 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:52:17,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 903 transitions, 16798 flow [2024-06-21 21:52:23,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 903 transitions, 16370 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-21 21:52:23,923 INFO L231 Difference]: Finished difference. Result has 556 places, 876 transitions, 14772 flow [2024-06-21 21:52:23,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14369, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14772, PETRI_PLACES=556, PETRI_TRANSITIONS=876} [2024-06-21 21:52:23,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 515 predicate places. [2024-06-21 21:52:23,923 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 876 transitions, 14772 flow [2024-06-21 21:52:23,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:23,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:23,923 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] [2024-06-21 21:52:23,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 21:52:23,924 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:23,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2027676216, now seen corresponding path program 8 times [2024-06-21 21:52:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:23,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137950495] [2024-06-21 21:52:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:23,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:24,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:24,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137950495] [2024-06-21 21:52:24,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137950495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:24,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:24,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:52:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193486453] [2024-06-21 21:52:24,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:24,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:52:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:52:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:52:24,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:52:24,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 876 transitions, 14772 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:24,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:24,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:52:24,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:27,188 INFO L124 PetriNetUnfolderBase]: 4764/7336 cut-off events. [2024-06-21 21:52:27,189 INFO L125 PetriNetUnfolderBase]: For 940230/940236 co-relation queries the response was YES. [2024-06-21 21:52:27,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69575 conditions, 7336 events. 4764/7336 cut-off events. For 940230/940236 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 44228 event pairs, 796 based on Foata normal form. 9/7344 useless extension candidates. Maximal degree in co-relation 69336. Up to 6986 conditions per place. [2024-06-21 21:52:27,337 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 820 selfloop transitions, 69 changer transitions 0/893 dead transitions. [2024-06-21 21:52:27,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 893 transitions, 16887 flow [2024-06-21 21:52:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:52:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:52:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:52:27,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 21:52:27,339 INFO L175 Difference]: Start difference. First operand has 556 places, 876 transitions, 14772 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:52:27,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 893 transitions, 16887 flow [2024-06-21 21:52:32,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 893 transitions, 16588 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 21:52:32,953 INFO L231 Difference]: Finished difference. Result has 560 places, 878 transitions, 14698 flow [2024-06-21 21:52:32,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14473, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14698, PETRI_PLACES=560, PETRI_TRANSITIONS=878} [2024-06-21 21:52:32,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 519 predicate places. [2024-06-21 21:52:32,954 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 878 transitions, 14698 flow [2024-06-21 21:52:32,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:32,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:32,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:32,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 21:52:32,955 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:32,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:32,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2000384140, now seen corresponding path program 4 times [2024-06-21 21:52:32,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:32,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362169019] [2024-06-21 21:52:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:32,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362169019] [2024-06-21 21:52:33,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362169019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:33,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:33,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:52:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957615349] [2024-06-21 21:52:33,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:52:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:52:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:52:34,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:52:34,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 878 transitions, 14698 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:34,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:34,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:52:34,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:36,170 INFO L124 PetriNetUnfolderBase]: 4836/7445 cut-off events. [2024-06-21 21:52:36,170 INFO L125 PetriNetUnfolderBase]: For 1027083/1027083 co-relation queries the response was YES. [2024-06-21 21:52:36,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70590 conditions, 7445 events. 4836/7445 cut-off events. For 1027083/1027083 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44959 event pairs, 815 based on Foata normal form. 12/7456 useless extension candidates. Maximal degree in co-relation 70348. Up to 6961 conditions per place. [2024-06-21 21:52:36,312 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 829 selfloop transitions, 68 changer transitions 0/901 dead transitions. [2024-06-21 21:52:36,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 901 transitions, 16795 flow [2024-06-21 21:52:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:52:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:52:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:52:36,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 21:52:36,317 INFO L175 Difference]: Start difference. First operand has 560 places, 878 transitions, 14698 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:52:36,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 901 transitions, 16795 flow [2024-06-21 21:52:41,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 901 transitions, 16645 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:52:41,919 INFO L231 Difference]: Finished difference. Result has 563 places, 882 transitions, 14786 flow [2024-06-21 21:52:41,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14548, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14786, PETRI_PLACES=563, PETRI_TRANSITIONS=882} [2024-06-21 21:52:41,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 522 predicate places. [2024-06-21 21:52:41,920 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 882 transitions, 14786 flow [2024-06-21 21:52:41,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:41,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:41,920 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] [2024-06-21 21:52:41,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 21:52:41,920 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:41,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2064903164, now seen corresponding path program 1 times [2024-06-21 21:52:41,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:41,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41052882] [2024-06-21 21:52:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:41,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41052882] [2024-06-21 21:52:42,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41052882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:42,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:42,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:52:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089496469] [2024-06-21 21:52:42,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:42,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:52:42,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:52:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:52:43,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:52:43,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 882 transitions, 14786 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:43,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:43,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:52:43,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:45,295 INFO L124 PetriNetUnfolderBase]: 4836/7447 cut-off events. [2024-06-21 21:52:45,295 INFO L125 PetriNetUnfolderBase]: For 952186/952186 co-relation queries the response was YES. [2024-06-21 21:52:45,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71194 conditions, 7447 events. 4836/7447 cut-off events. For 952186/952186 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 45054 event pairs, 836 based on Foata normal form. 2/7448 useless extension candidates. Maximal degree in co-relation 70951. Up to 6981 conditions per place. [2024-06-21 21:52:45,447 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 789 selfloop transitions, 103 changer transitions 0/896 dead transitions. [2024-06-21 21:52:45,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 896 transitions, 16742 flow [2024-06-21 21:52:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:52:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:52:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:52:45,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 21:52:45,448 INFO L175 Difference]: Start difference. First operand has 563 places, 882 transitions, 14786 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:52:45,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 896 transitions, 16742 flow [2024-06-21 21:52:51,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 896 transitions, 16535 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 21:52:51,392 INFO L231 Difference]: Finished difference. Result has 566 places, 885 transitions, 14949 flow [2024-06-21 21:52:51,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14579, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14949, PETRI_PLACES=566, PETRI_TRANSITIONS=885} [2024-06-21 21:52:51,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 525 predicate places. [2024-06-21 21:52:51,393 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 885 transitions, 14949 flow [2024-06-21 21:52:51,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:51,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:51,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:51,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 21:52:51,394 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:51,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1498299296, now seen corresponding path program 9 times [2024-06-21 21:52:51,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:51,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492200014] [2024-06-21 21:52:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:51,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:52,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492200014] [2024-06-21 21:52:52,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492200014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:52,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:52,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:52:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518869163] [2024-06-21 21:52:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:52,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:52:52,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:52:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:52:52,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:52:52,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 885 transitions, 14949 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:52,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:52,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:52:52,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:54,992 INFO L124 PetriNetUnfolderBase]: 4950/7598 cut-off events. [2024-06-21 21:52:54,992 INFO L125 PetriNetUnfolderBase]: For 1019460/1019466 co-relation queries the response was YES. [2024-06-21 21:52:55,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73715 conditions, 7598 events. 4950/7598 cut-off events. For 1019460/1019466 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 45779 event pairs, 823 based on Foata normal form. 10/7607 useless extension candidates. Maximal degree in co-relation 73471. Up to 6623 conditions per place. [2024-06-21 21:52:55,144 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 718 selfloop transitions, 244 changer transitions 0/966 dead transitions. [2024-06-21 21:52:55,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 966 transitions, 18126 flow [2024-06-21 21:52:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:52:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:52:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 241 transitions. [2024-06-21 21:52:55,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303571428571429 [2024-06-21 21:52:55,145 INFO L175 Difference]: Start difference. First operand has 566 places, 885 transitions, 14949 flow. Second operand 14 states and 241 transitions. [2024-06-21 21:52:55,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 966 transitions, 18126 flow [2024-06-21 21:53:00,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 966 transitions, 17829 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 21:53:00,522 INFO L231 Difference]: Finished difference. Result has 575 places, 919 transitions, 15950 flow [2024-06-21 21:53:00,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14656, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15950, PETRI_PLACES=575, PETRI_TRANSITIONS=919} [2024-06-21 21:53:00,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 534 predicate places. [2024-06-21 21:53:00,523 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 919 transitions, 15950 flow [2024-06-21 21:53:00,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:00,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:00,523 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] [2024-06-21 21:53:00,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 21:53:00,524 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:00,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1380206966, now seen corresponding path program 10 times [2024-06-21 21:53:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009062182] [2024-06-21 21:53:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:00,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:01,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:01,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009062182] [2024-06-21 21:53:01,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009062182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:01,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:01,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:53:01,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732022502] [2024-06-21 21:53:01,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:01,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:53:01,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:53:01,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:53:01,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:53:01,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 919 transitions, 15950 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:01,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:01,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:53:01,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:04,161 INFO L124 PetriNetUnfolderBase]: 4960/7626 cut-off events. [2024-06-21 21:53:04,161 INFO L125 PetriNetUnfolderBase]: For 1004658/1004664 co-relation queries the response was YES. [2024-06-21 21:53:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75280 conditions, 7626 events. 4960/7626 cut-off events. For 1004658/1004664 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46195 event pairs, 831 based on Foata normal form. 8/7633 useless extension candidates. Maximal degree in co-relation 75035. Up to 7254 conditions per place. [2024-06-21 21:53:04,313 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 888 selfloop transitions, 72 changer transitions 0/964 dead transitions. [2024-06-21 21:53:04,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 964 transitions, 18298 flow [2024-06-21 21:53:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:53:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:53:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-21 21:53:04,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40208333333333335 [2024-06-21 21:53:04,314 INFO L175 Difference]: Start difference. First operand has 575 places, 919 transitions, 15950 flow. Second operand 12 states and 193 transitions. [2024-06-21 21:53:04,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 964 transitions, 18298 flow [2024-06-21 21:53:10,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 964 transitions, 17752 flow, removed 133 selfloop flow, removed 9 redundant places. [2024-06-21 21:53:10,534 INFO L231 Difference]: Finished difference. Result has 582 places, 938 transitions, 15925 flow [2024-06-21 21:53:10,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15451, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=851, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15925, PETRI_PLACES=582, PETRI_TRANSITIONS=938} [2024-06-21 21:53:10,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 541 predicate places. [2024-06-21 21:53:10,535 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 938 transitions, 15925 flow [2024-06-21 21:53:10,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:10,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:10,535 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] [2024-06-21 21:53:10,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 21:53:10,536 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:10,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1824746434, now seen corresponding path program 11 times [2024-06-21 21:53:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097278775] [2024-06-21 21:53:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:10,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:11,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:11,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097278775] [2024-06-21 21:53:11,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097278775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:11,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:11,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:53:11,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741669000] [2024-06-21 21:53:11,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:53:11,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:53:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:53:11,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:53:11,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 938 transitions, 15925 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:11,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:11,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:53:11,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:14,467 INFO L124 PetriNetUnfolderBase]: 5072/7768 cut-off events. [2024-06-21 21:53:14,467 INFO L125 PetriNetUnfolderBase]: For 1066768/1066774 co-relation queries the response was YES. [2024-06-21 21:53:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77175 conditions, 7768 events. 5072/7768 cut-off events. For 1066768/1066774 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 46867 event pairs, 837 based on Foata normal form. 10/7777 useless extension candidates. Maximal degree in co-relation 76924. Up to 6863 conditions per place. [2024-06-21 21:53:14,627 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 707 selfloop transitions, 302 changer transitions 0/1013 dead transitions. [2024-06-21 21:53:14,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 1013 transitions, 18976 flow [2024-06-21 21:53:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:53:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:53:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 228 transitions. [2024-06-21 21:53:14,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43846153846153846 [2024-06-21 21:53:14,628 INFO L175 Difference]: Start difference. First operand has 582 places, 938 transitions, 15925 flow. Second operand 13 states and 228 transitions. [2024-06-21 21:53:14,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 1013 transitions, 18976 flow [2024-06-21 21:53:21,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1013 transitions, 18798 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-21 21:53:21,924 INFO L231 Difference]: Finished difference. Result has 593 places, 970 transitions, 17020 flow [2024-06-21 21:53:21,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15747, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17020, PETRI_PLACES=593, PETRI_TRANSITIONS=970} [2024-06-21 21:53:21,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 552 predicate places. [2024-06-21 21:53:21,925 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 970 transitions, 17020 flow [2024-06-21 21:53:21,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:21,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:21,925 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] [2024-06-21 21:53:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 21:53:21,925 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:21,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:21,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1380027042, now seen corresponding path program 5 times [2024-06-21 21:53:21,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:21,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713838608] [2024-06-21 21:53:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:21,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:23,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:23,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713838608] [2024-06-21 21:53:23,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713838608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:23,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:23,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:53:23,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942317890] [2024-06-21 21:53:23,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:23,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:53:23,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:53:23,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:53:23,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:53:23,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 970 transitions, 17020 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:23,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:23,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:53:23,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:26,168 INFO L124 PetriNetUnfolderBase]: 5116/7855 cut-off events. [2024-06-21 21:53:26,169 INFO L125 PetriNetUnfolderBase]: For 1160543/1160543 co-relation queries the response was YES. [2024-06-21 21:53:26,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79453 conditions, 7855 events. 5116/7855 cut-off events. For 1160543/1160543 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 47624 event pairs, 860 based on Foata normal form. 12/7866 useless extension candidates. Maximal degree in co-relation 79199. Up to 7253 conditions per place. [2024-06-21 21:53:26,307 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 859 selfloop transitions, 134 changer transitions 0/997 dead transitions. [2024-06-21 21:53:26,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 997 transitions, 19252 flow [2024-06-21 21:53:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:53:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:53:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 21:53:26,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 21:53:26,308 INFO L175 Difference]: Start difference. First operand has 593 places, 970 transitions, 17020 flow. Second operand 10 states and 173 transitions. [2024-06-21 21:53:26,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 997 transitions, 19252 flow [2024-06-21 21:53:33,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 997 transitions, 18675 flow, removed 180 selfloop flow, removed 6 redundant places. [2024-06-21 21:53:33,424 INFO L231 Difference]: Finished difference. Result has 597 places, 971 transitions, 16755 flow [2024-06-21 21:53:33,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16443, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16755, PETRI_PLACES=597, PETRI_TRANSITIONS=971} [2024-06-21 21:53:33,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 556 predicate places. [2024-06-21 21:53:33,424 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 971 transitions, 16755 flow [2024-06-21 21:53:33,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:33,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:33,425 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] [2024-06-21 21:53:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 21:53:33,425 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:33,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1380033986, now seen corresponding path program 12 times [2024-06-21 21:53:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:33,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858413162] [2024-06-21 21:53:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:33,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:34,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:34,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858413162] [2024-06-21 21:53:34,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858413162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:34,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:34,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:53:34,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138710254] [2024-06-21 21:53:34,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:34,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:53:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:53:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:53:34,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:53:34,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 971 transitions, 16755 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:34,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:34,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:53:34,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:37,129 INFO L124 PetriNetUnfolderBase]: 5126/7876 cut-off events. [2024-06-21 21:53:37,130 INFO L125 PetriNetUnfolderBase]: For 1089645/1089651 co-relation queries the response was YES. [2024-06-21 21:53:37,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79190 conditions, 7876 events. 5126/7876 cut-off events. For 1089645/1089651 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 47886 event pairs, 849 based on Foata normal form. 8/7883 useless extension candidates. Maximal degree in co-relation 78934. Up to 7492 conditions per place. [2024-06-21 21:53:37,298 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 925 selfloop transitions, 72 changer transitions 0/1001 dead transitions. [2024-06-21 21:53:37,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 1001 transitions, 18930 flow [2024-06-21 21:53:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:53:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:53:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2024-06-21 21:53:37,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2024-06-21 21:53:37,299 INFO L175 Difference]: Start difference. First operand has 597 places, 971 transitions, 16755 flow. Second operand 13 states and 205 transitions. [2024-06-21 21:53:37,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 1001 transitions, 18930 flow [2024-06-21 21:53:44,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1001 transitions, 18598 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-21 21:53:44,315 INFO L231 Difference]: Finished difference. Result has 597 places, 974 transitions, 16648 flow [2024-06-21 21:53:44,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16423, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16648, PETRI_PLACES=597, PETRI_TRANSITIONS=974} [2024-06-21 21:53:44,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 556 predicate places. [2024-06-21 21:53:44,316 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 974 transitions, 16648 flow [2024-06-21 21:53:44,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:44,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:44,316 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] [2024-06-21 21:53:44,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 21:53:44,317 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:44,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:44,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1352272810, now seen corresponding path program 13 times [2024-06-21 21:53:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:44,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752885300] [2024-06-21 21:53:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752885300] [2024-06-21 21:53:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752885300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:45,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:45,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:53:45,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664043424] [2024-06-21 21:53:45,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:45,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:53:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:53:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:53:45,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:53:45,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 974 transitions, 16648 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:45,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:45,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:53:45,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:48,456 INFO L124 PetriNetUnfolderBase]: 5182/7924 cut-off events. [2024-06-21 21:53:48,456 INFO L125 PetriNetUnfolderBase]: For 1045580/1045586 co-relation queries the response was YES. [2024-06-21 21:53:48,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79152 conditions, 7924 events. 5182/7924 cut-off events. For 1045580/1045586 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 47886 event pairs, 686 based on Foata normal form. 8/7931 useless extension candidates. Maximal degree in co-relation 78900. Up to 6648 conditions per place. [2024-06-21 21:53:48,620 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 749 selfloop transitions, 344 changer transitions 0/1097 dead transitions. [2024-06-21 21:53:48,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 1097 transitions, 20806 flow [2024-06-21 21:53:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:53:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:53:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 21:53:48,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 21:53:48,621 INFO L175 Difference]: Start difference. First operand has 597 places, 974 transitions, 16648 flow. Second operand 10 states and 182 transitions. [2024-06-21 21:53:48,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 1097 transitions, 20806 flow [2024-06-21 21:53:55,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1097 transitions, 20614 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-21 21:53:55,577 INFO L231 Difference]: Finished difference. Result has 601 places, 1067 transitions, 18816 flow [2024-06-21 21:53:55,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16456, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18816, PETRI_PLACES=601, PETRI_TRANSITIONS=1067} [2024-06-21 21:53:55,578 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 560 predicate places. [2024-06-21 21:53:55,578 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1067 transitions, 18816 flow [2024-06-21 21:53:55,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:55,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:55,578 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] [2024-06-21 21:53:55,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 21:53:55,578 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:55,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1380211616, now seen corresponding path program 14 times [2024-06-21 21:53:55,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:55,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397144190] [2024-06-21 21:53:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:56,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:56,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397144190] [2024-06-21 21:53:56,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397144190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:56,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:53:56,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69184914] [2024-06-21 21:53:56,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:53:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:53:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:53:56,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:53:56,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1067 transitions, 18816 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:56,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:56,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:53:56,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:00,514 INFO L124 PetriNetUnfolderBase]: 5228/7996 cut-off events. [2024-06-21 21:54:00,514 INFO L125 PetriNetUnfolderBase]: For 1105938/1105944 co-relation queries the response was YES. [2024-06-21 21:54:00,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82962 conditions, 7996 events. 5228/7996 cut-off events. For 1105938/1105944 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 48437 event pairs, 811 based on Foata normal form. 10/8005 useless extension candidates. Maximal degree in co-relation 82705. Up to 7477 conditions per place. [2024-06-21 21:54:00,662 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 982 selfloop transitions, 125 changer transitions 0/1111 dead transitions. [2024-06-21 21:54:00,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 1111 transitions, 21772 flow [2024-06-21 21:54:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:54:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:54:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-21 21:54:00,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-06-21 21:54:00,663 INFO L175 Difference]: Start difference. First operand has 601 places, 1067 transitions, 18816 flow. Second operand 13 states and 218 transitions. [2024-06-21 21:54:00,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 1111 transitions, 21772 flow [2024-06-21 21:54:07,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1111 transitions, 21596 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:07,798 INFO L231 Difference]: Finished difference. Result has 613 places, 1082 transitions, 19314 flow [2024-06-21 21:54:07,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18640, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19314, PETRI_PLACES=613, PETRI_TRANSITIONS=1082} [2024-06-21 21:54:07,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 572 predicate places. [2024-06-21 21:54:07,799 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1082 transitions, 19314 flow [2024-06-21 21:54:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:07,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:07,799 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] [2024-06-21 21:54:07,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 21:54:07,800 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:07,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash 836282948, now seen corresponding path program 15 times [2024-06-21 21:54:07,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:07,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651458263] [2024-06-21 21:54:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:08,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:08,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651458263] [2024-06-21 21:54:08,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651458263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:08,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:08,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:54:08,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079553554] [2024-06-21 21:54:08,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:54:08,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:54:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:54:09,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:54:09,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1082 transitions, 19314 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:09,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:09,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:54:09,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:12,511 INFO L124 PetriNetUnfolderBase]: 5242/8020 cut-off events. [2024-06-21 21:54:12,511 INFO L125 PetriNetUnfolderBase]: For 1115794/1115800 co-relation queries the response was YES. [2024-06-21 21:54:12,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82879 conditions, 8020 events. 5242/8020 cut-off events. For 1115794/1115800 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 48616 event pairs, 845 based on Foata normal form. 12/8031 useless extension candidates. Maximal degree in co-relation 82618. Up to 7193 conditions per place. [2024-06-21 21:54:12,862 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 800 selfloop transitions, 312 changer transitions 0/1116 dead transitions. [2024-06-21 21:54:12,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1116 transitions, 21806 flow [2024-06-21 21:54:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:54:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:54:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-21 21:54:12,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 21:54:12,863 INFO L175 Difference]: Start difference. First operand has 613 places, 1082 transitions, 19314 flow. Second operand 12 states and 205 transitions. [2024-06-21 21:54:12,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1116 transitions, 21806 flow [2024-06-21 21:54:20,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1116 transitions, 21521 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-06-21 21:54:20,185 INFO L231 Difference]: Finished difference. Result has 616 places, 1089 transitions, 19856 flow [2024-06-21 21:54:20,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19029, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19856, PETRI_PLACES=616, PETRI_TRANSITIONS=1089} [2024-06-21 21:54:20,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 575 predicate places. [2024-06-21 21:54:20,186 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 1089 transitions, 19856 flow [2024-06-21 21:54:20,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:20,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:20,186 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] [2024-06-21 21:54:20,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 21:54:20,186 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:20,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash 879548486, now seen corresponding path program 16 times [2024-06-21 21:54:20,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:20,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870304350] [2024-06-21 21:54:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:21,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:21,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870304350] [2024-06-21 21:54:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870304350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:21,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:21,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:54:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098423713] [2024-06-21 21:54:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:21,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:54:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:54:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:54:21,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:54:21,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 1089 transitions, 19856 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:21,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:21,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:54:21,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:24,682 INFO L124 PetriNetUnfolderBase]: 5358/8184 cut-off events. [2024-06-21 21:54:24,682 INFO L125 PetriNetUnfolderBase]: For 1137493/1137499 co-relation queries the response was YES. [2024-06-21 21:54:24,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85404 conditions, 8184 events. 5358/8184 cut-off events. For 1137493/1137499 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 49632 event pairs, 699 based on Foata normal form. 10/8193 useless extension candidates. Maximal degree in co-relation 85141. Up to 6657 conditions per place. [2024-06-21 21:54:24,865 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 725 selfloop transitions, 426 changer transitions 0/1155 dead transitions. [2024-06-21 21:54:24,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1155 transitions, 23358 flow [2024-06-21 21:54:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:54:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:54:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 21:54:24,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 21:54:24,866 INFO L175 Difference]: Start difference. First operand has 616 places, 1089 transitions, 19856 flow. Second operand 11 states and 195 transitions. [2024-06-21 21:54:24,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1155 transitions, 23358 flow [2024-06-21 21:54:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1155 transitions, 22577 flow, removed 91 selfloop flow, removed 9 redundant places. [2024-06-21 21:54:32,199 INFO L231 Difference]: Finished difference. Result has 619 places, 1122 transitions, 20724 flow [2024-06-21 21:54:32,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19167, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20724, PETRI_PLACES=619, PETRI_TRANSITIONS=1122} [2024-06-21 21:54:32,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 578 predicate places. [2024-06-21 21:54:32,199 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1122 transitions, 20724 flow [2024-06-21 21:54:32,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:32,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:32,200 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] [2024-06-21 21:54:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 21:54:32,200 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:32,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash 875079836, now seen corresponding path program 17 times [2024-06-21 21:54:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:32,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581037800] [2024-06-21 21:54:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581037800] [2024-06-21 21:54:33,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581037800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:33,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:33,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:54:33,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440605713] [2024-06-21 21:54:33,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:33,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:54:33,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:54:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:54:33,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:54:33,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1122 transitions, 20724 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:33,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:33,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:54:33,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:36,503 INFO L124 PetriNetUnfolderBase]: 5368/8186 cut-off events. [2024-06-21 21:54:36,503 INFO L125 PetriNetUnfolderBase]: For 1147160/1147166 co-relation queries the response was YES. [2024-06-21 21:54:36,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86651 conditions, 8186 events. 5368/8186 cut-off events. For 1147160/1147166 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 49495 event pairs, 712 based on Foata normal form. 8/8193 useless extension candidates. Maximal degree in co-relation 86386. Up to 7265 conditions per place. [2024-06-21 21:54:36,888 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 883 selfloop transitions, 265 changer transitions 0/1152 dead transitions. [2024-06-21 21:54:36,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 1152 transitions, 23526 flow [2024-06-21 21:54:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:54:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:54:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 21:54:36,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-21 21:54:36,890 INFO L175 Difference]: Start difference. First operand has 619 places, 1122 transitions, 20724 flow. Second operand 10 states and 178 transitions. [2024-06-21 21:54:36,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 1152 transitions, 23526 flow [2024-06-21 21:54:43,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1152 transitions, 22805 flow, removed 122 selfloop flow, removed 7 redundant places. [2024-06-21 21:54:43,989 INFO L231 Difference]: Finished difference. Result has 622 places, 1126 transitions, 20677 flow [2024-06-21 21:54:43,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20003, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=858, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20677, PETRI_PLACES=622, PETRI_TRANSITIONS=1126} [2024-06-21 21:54:43,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 581 predicate places. [2024-06-21 21:54:43,990 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1126 transitions, 20677 flow [2024-06-21 21:54:43,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:43,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:43,991 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] [2024-06-21 21:54:43,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 21:54:43,991 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:43,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash 171446940, now seen corresponding path program 18 times [2024-06-21 21:54:43,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:43,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063632416] [2024-06-21 21:54:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:43,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:45,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:45,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063632416] [2024-06-21 21:54:45,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063632416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:45,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:45,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:54:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087615378] [2024-06-21 21:54:45,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:45,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:54:45,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:54:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:54:45,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:54:45,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1126 transitions, 20677 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:45,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:45,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:54:45,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:48,603 INFO L124 PetriNetUnfolderBase]: 5457/8316 cut-off events. [2024-06-21 21:54:48,604 INFO L125 PetriNetUnfolderBase]: For 1248222/1248222 co-relation queries the response was YES. [2024-06-21 21:54:48,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89814 conditions, 8316 events. 5457/8316 cut-off events. For 1248222/1248222 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 50333 event pairs, 750 based on Foata normal form. 4/8319 useless extension candidates. Maximal degree in co-relation 89547. Up to 7116 conditions per place. [2024-06-21 21:54:48,776 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 834 selfloop transitions, 346 changer transitions 0/1184 dead transitions. [2024-06-21 21:54:48,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 1184 transitions, 24338 flow [2024-06-21 21:54:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:54:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:54:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 222 transitions. [2024-06-21 21:54:48,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269230769230769 [2024-06-21 21:54:48,777 INFO L175 Difference]: Start difference. First operand has 622 places, 1126 transitions, 20677 flow. Second operand 13 states and 222 transitions. [2024-06-21 21:54:48,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 1184 transitions, 24338 flow [2024-06-21 21:54:57,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1184 transitions, 23748 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:57,082 INFO L231 Difference]: Finished difference. Result has 633 places, 1150 transitions, 21773 flow [2024-06-21 21:54:57,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20103, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=21773, PETRI_PLACES=633, PETRI_TRANSITIONS=1150} [2024-06-21 21:54:57,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 592 predicate places. [2024-06-21 21:54:57,083 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 1150 transitions, 21773 flow [2024-06-21 21:54:57,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:57,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:57,083 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] [2024-06-21 21:54:57,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 21:54:57,083 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:57,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1482067040, now seen corresponding path program 6 times [2024-06-21 21:54:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:57,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583132911] [2024-06-21 21:54:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:57,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:58,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583132911] [2024-06-21 21:54:58,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583132911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:58,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:58,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66591058] [2024-06-21 21:54:58,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:58,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:58,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:54:58,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1150 transitions, 21773 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-21 21:54:58,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:58,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:54:58,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:01,563 INFO L124 PetriNetUnfolderBase]: 5501/8387 cut-off events. [2024-06-21 21:55:01,564 INFO L125 PetriNetUnfolderBase]: For 1348231/1348237 co-relation queries the response was YES. [2024-06-21 21:55:01,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92364 conditions, 8387 events. 5501/8387 cut-off events. For 1348231/1348237 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 50902 event pairs, 755 based on Foata normal form. 18/8404 useless extension candidates. Maximal degree in co-relation 92093. Up to 7724 conditions per place. [2024-06-21 21:55:01,738 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 1027 selfloop transitions, 148 changer transitions 0/1179 dead transitions. [2024-06-21 21:55:01,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 1179 transitions, 24466 flow [2024-06-21 21:55:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:55:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:55:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:55:01,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:55:01,739 INFO L175 Difference]: Start difference. First operand has 633 places, 1150 transitions, 21773 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:55:01,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 1179 transitions, 24466 flow [2024-06-21 21:55:10,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 1179 transitions, 23908 flow, removed 164 selfloop flow, removed 7 redundant places. [2024-06-21 21:55:10,830 INFO L231 Difference]: Finished difference. Result has 635 places, 1151 transitions, 21557 flow [2024-06-21 21:55:10,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21215, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21557, PETRI_PLACES=635, PETRI_TRANSITIONS=1151} [2024-06-21 21:55:10,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 594 predicate places. [2024-06-21 21:55:10,831 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 1151 transitions, 21557 flow [2024-06-21 21:55:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-21 21:55:10,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:10,831 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] [2024-06-21 21:55:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 21:55:10,831 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:55:10,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash 4946250, now seen corresponding path program 19 times [2024-06-21 21:55:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:10,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809079230] [2024-06-21 21:55:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:11,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:11,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809079230] [2024-06-21 21:55:11,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809079230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:11,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:11,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:55:11,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871495999] [2024-06-21 21:55:11,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:11,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:55:11,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:55:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:55:11,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:55:11,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 1151 transitions, 21557 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:11,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:11,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:55:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:15,548 INFO L124 PetriNetUnfolderBase]: 5511/8401 cut-off events. [2024-06-21 21:55:15,548 INFO L125 PetriNetUnfolderBase]: For 1279424/1279430 co-relation queries the response was YES. [2024-06-21 21:55:15,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92429 conditions, 8401 events. 5511/8401 cut-off events. For 1279424/1279430 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 50973 event pairs, 751 based on Foata normal form. 8/8408 useless extension candidates. Maximal degree in co-relation 92155. Up to 7811 conditions per place. [2024-06-21 21:55:15,732 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 1019 selfloop transitions, 159 changer transitions 0/1182 dead transitions. [2024-06-21 21:55:15,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 1182 transitions, 24292 flow [2024-06-21 21:55:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:55:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:55:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 21:55:15,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-21 21:55:15,733 INFO L175 Difference]: Start difference. First operand has 635 places, 1151 transitions, 21557 flow. Second operand 10 states and 171 transitions. [2024-06-21 21:55:15,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 1182 transitions, 24292 flow