./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:53:41,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:53:41,701 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:53:41,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:53:41,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:53:41,717 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:53:41,717 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:53:41,718 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:53:41,718 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:53:41,718 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:53:41,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:53:41,719 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:53:41,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:53:41,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:53:41,720 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:53:41,720 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:53:41,720 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:53:41,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:53:41,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:53:41,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:53:41,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:53:41,721 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:53:41,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:53:41,722 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:53:41,722 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:53:41,722 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:53:41,723 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:53:41,723 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:53:41,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:53:41,723 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:53:41,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:53:41,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:53:41,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:53:41,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:53:41,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:53:41,725 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:53:41,725 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:53:41,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:53:41,725 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:53:41,726 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:53:41,726 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:53:41,726 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:53:41,726 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:53:41,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:53:41,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:53:41,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:53:41,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:53:41,896 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:53:41,896 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:53:41,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:53:43,084 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:53:43,288 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:53:43,288 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:53:43,304 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20a71f47/80e7f7707c114cd79400886e0765dd43/FLAG7fd7c7942 [2024-06-21 21:53:43,319 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20a71f47/80e7f7707c114cd79400886e0765dd43 [2024-06-21 21:53:43,321 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:53:43,322 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:53:43,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 21:53:43,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:53:43,450 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:53:43,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:53:43,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:53:43,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:53:43,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:53:43" (1/2) ... [2024-06-21 21:53:43,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6b7c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:53:43, skipping insertion in model container [2024-06-21 21:53:43,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:53:43" (1/2) ... [2024-06-21 21:53:43,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5320634f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:53:43, skipping insertion in model container [2024-06-21 21:53:43,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:53:43" (2/2) ... [2024-06-21 21:53:43,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6b7c0e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:53:43, skipping insertion in model container [2024-06-21 21:53:43,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:53:43" (2/2) ... [2024-06-21 21:53:43,474 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:53:43,540 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:53:43,541 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] (((((((((((((((! multithreaded || y$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) [2024-06-21 21:53:43,541 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((! multithreaded || y$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) [2024-06-21 21:53:43,542 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || y$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) [2024-06-21 21:53:43,542 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:53:43,542 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-21 21:53:43,578 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:53:43,871 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:53:43,882 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:53:43,996 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:53:44,035 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:53:44,035 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:53:44 WrapperNode [2024-06-21 21:53:44,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:53:44,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:53:44,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:53:44,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:53:44,042 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,061 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,089 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 142 [2024-06-21 21:53:44,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:53:44,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:53:44,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:53:44,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:53:44,100 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,100 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,103 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,118 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 21:53:44,118 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,118 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,125 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,126 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,128 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,129 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:53:44,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:53:44,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:53:44,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:53:44,133 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 09:53:44" (1/1) ... [2024-06-21 21:53:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:53:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:53:44,186 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 21:53:44,227 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 21:53:44,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:53:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:53:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:53:44,244 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:53:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:53:44,245 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:53:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:53:44,245 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:53:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:53:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:53:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:53:44,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:53:44,247 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 21:53:44,382 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:53:44,385 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:53:44,723 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:53:44,723 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:53:44,831 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:53:44,831 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:53:44,832 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:53:44 BoogieIcfgContainer [2024-06-21 21:53:44,832 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:53:44,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:53:44,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:53:44,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:53:44,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:53:43" (1/4) ... [2024-06-21 21:53:44,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a3cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:53:44, skipping insertion in model container [2024-06-21 21:53:44,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:53:43" (2/4) ... [2024-06-21 21:53:44,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a3cac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:53:44, skipping insertion in model container [2024-06-21 21:53:44,837 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 09:53:44" (3/4) ... [2024-06-21 21:53:44,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a3cac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:53:44, skipping insertion in model container [2024-06-21 21:53:44,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:53:44" (4/4) ... [2024-06-21 21:53:44,838 INFO L112 eAbstractionObserver]: Analyzing ICFG safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:53:44,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:53:44,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:53:44,851 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:53:44,884 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:53:44,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 21:53:44,926 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-21 21:53:44,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:53:44,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:53:44,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 21:53:44,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-21 21:53:44,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:53:44,943 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;@a5ec309, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:53:44,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:53:44,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:53:44,946 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:53:44,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:53:44,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:44,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:53:44,947 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 21:53:44,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash 367068007, now seen corresponding path program 1 times [2024-06-21 21:53:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107915698] [2024-06-21 21:53:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:45,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:45,836 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 21:53:45,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:45,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107915698] [2024-06-21 21:53:45,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107915698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:45,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:53:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877545386] [2024-06-21 21:53:45,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:53:45,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:53:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:53:45,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-21 21:53:45,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:45,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:45,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-21 21:53:45,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:46,149 INFO L124 PetriNetUnfolderBase]: 1156/1753 cut-off events. [2024-06-21 21:53:46,150 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 21:53:46,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 1753 events. 1156/1753 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7857 event pairs, 805 based on Foata normal form. 1/1716 useless extension candidates. Maximal degree in co-relation 3568. Up to 1740 conditions per place. [2024-06-21 21:53:46,165 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 31 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-06-21 21:53:46,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 165 flow [2024-06-21 21:53:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:53:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:53:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-21 21:53:46,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811965811965812 [2024-06-21 21:53:46,177 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 68 transitions. [2024-06-21 21:53:46,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 165 flow [2024-06-21 21:53:46,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:53:46,181 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-21 21:53:46,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-21 21:53:46,185 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-21 21:53:46,185 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-21 21:53:46,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:46,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:46,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:46,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:53:46,186 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 21:53:46,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash 565078598, now seen corresponding path program 1 times [2024-06-21 21:53:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608903819] [2024-06-21 21:53:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608903819] [2024-06-21 21:53:46,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608903819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:46,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:46,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:53:46,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468248274] [2024-06-21 21:53:46,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:46,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:53:46,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:53:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:53:46,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-21 21:53:46,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:46,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:46,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-21 21:53:46,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:46,892 INFO L124 PetriNetUnfolderBase]: 1150/1744 cut-off events. [2024-06-21 21:53:46,892 INFO L125 PetriNetUnfolderBase]: For 338/346 co-relation queries the response was YES. [2024-06-21 21:53:46,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 1744 events. 1150/1744 cut-off events. For 338/346 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7706 event pairs, 699 based on Foata normal form. 6/1747 useless extension candidates. Maximal degree in co-relation 4039. Up to 1716 conditions per place. [2024-06-21 21:53:46,902 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 38 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-06-21 21:53:46,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 232 flow [2024-06-21 21:53:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:53:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:53:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-21 21:53:46,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 21:53:46,906 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 88 transitions. [2024-06-21 21:53:46,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 232 flow [2024-06-21 21:53:46,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:53:46,909 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 132 flow [2024-06-21 21:53:46,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=92, 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=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:53:46,910 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2024-06-21 21:53:46,910 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 132 flow [2024-06-21 21:53:46,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:46,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:46,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:46,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:53:46,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:46,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash 337568732, now seen corresponding path program 1 times [2024-06-21 21:53:46,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:46,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675945973] [2024-06-21 21:53:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:47,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:47,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675945973] [2024-06-21 21:53:47,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675945973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:47,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:53:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244017422] [2024-06-21 21:53:47,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:47,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:53:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:47,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:53:47,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:53:47,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-06-21 21:53:47,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:47,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:47,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-06-21 21:53:47,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:47,634 INFO L124 PetriNetUnfolderBase]: 1405/2112 cut-off events. [2024-06-21 21:53:47,634 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-06-21 21:53:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 2112 events. 1405/2112 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9391 event pairs, 627 based on Foata normal form. 7/2117 useless extension candidates. Maximal degree in co-relation 5392. Up to 1974 conditions per place. [2024-06-21 21:53:47,643 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 60 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-21 21:53:47,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 417 flow [2024-06-21 21:53:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:53:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:53:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-21 21:53:47,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-06-21 21:53:47,644 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 132 flow. Second operand 5 states and 114 transitions. [2024-06-21 21:53:47,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 417 flow [2024-06-21 21:53:47,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 78 transitions, 396 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:53:47,647 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 229 flow [2024-06-21 21:53:47,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2024-06-21 21:53:47,647 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-06-21 21:53:47,648 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 229 flow [2024-06-21 21:53:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:53:47,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:47,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2040931289, now seen corresponding path program 1 times [2024-06-21 21:53:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186567335] [2024-06-21 21:53:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:48,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:48,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186567335] [2024-06-21 21:53:48,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186567335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:48,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:48,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:53:48,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741048137] [2024-06-21 21:53:48,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:48,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:53:48,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:48,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:53:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:53:48,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-06-21 21:53:48,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:48,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:48,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-06-21 21:53:48,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:48,553 INFO L124 PetriNetUnfolderBase]: 1427/2145 cut-off events. [2024-06-21 21:53:48,553 INFO L125 PetriNetUnfolderBase]: For 2513/2515 co-relation queries the response was YES. [2024-06-21 21:53:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6648 conditions, 2145 events. 1427/2145 cut-off events. For 2513/2515 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9578 event pairs, 492 based on Foata normal form. 7/2150 useless extension candidates. Maximal degree in co-relation 6631. Up to 1917 conditions per place. [2024-06-21 21:53:48,564 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 71 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-21 21:53:48,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 101 transitions, 621 flow [2024-06-21 21:53:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 21:53:48,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 21:53:48,566 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 229 flow. Second operand 6 states and 138 transitions. [2024-06-21 21:53:48,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 101 transitions, 621 flow [2024-06-21 21:53:48,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 101 transitions, 617 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 21:53:48,570 INFO L231 Difference]: Finished difference. Result has 57 places, 62 transitions, 390 flow [2024-06-21 21:53:48,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=57, PETRI_TRANSITIONS=62} [2024-06-21 21:53:48,571 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2024-06-21 21:53:48,571 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 62 transitions, 390 flow [2024-06-21 21:53:48,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:48,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:48,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:48,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:53:48,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:48,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2013917925, now seen corresponding path program 1 times [2024-06-21 21:53:48,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:48,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918039005] [2024-06-21 21:53:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:48,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:49,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:49,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918039005] [2024-06-21 21:53:49,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918039005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:49,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:49,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895542097] [2024-06-21 21:53:49,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:49,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:49,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-06-21 21:53:49,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 62 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:49,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:49,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-06-21 21:53:49,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:49,708 INFO L124 PetriNetUnfolderBase]: 1509/2291 cut-off events. [2024-06-21 21:53:49,708 INFO L125 PetriNetUnfolderBase]: For 5037/5039 co-relation queries the response was YES. [2024-06-21 21:53:49,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8305 conditions, 2291 events. 1509/2291 cut-off events. For 5037/5039 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10594 event pairs, 364 based on Foata normal form. 26/2315 useless extension candidates. Maximal degree in co-relation 8282. Up to 1881 conditions per place. [2024-06-21 21:53:49,722 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 79 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-21 21:53:49,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 111 transitions, 790 flow [2024-06-21 21:53:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 21:53:49,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-21 21:53:49,725 INFO L175 Difference]: Start difference. First operand has 57 places, 62 transitions, 390 flow. Second operand 7 states and 157 transitions. [2024-06-21 21:53:49,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 111 transitions, 790 flow [2024-06-21 21:53:49,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 780 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 21:53:49,737 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 454 flow [2024-06-21 21:53:49,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-21 21:53:49,739 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-21 21:53:49,739 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 454 flow [2024-06-21 21:53:49,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:49,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:49,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:49,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:53:49,741 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 21:53:49,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1413061631, now seen corresponding path program 1 times [2024-06-21 21:53:49,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:49,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811633099] [2024-06-21 21:53:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:50,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:50,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811633099] [2024-06-21 21:53:50,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811633099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:50,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:50,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:53:50,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277227847] [2024-06-21 21:53:50,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:50,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:53:50,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:50,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:53:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:53:50,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:50,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 454 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:50,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:50,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:50,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:50,565 INFO L124 PetriNetUnfolderBase]: 1499/2276 cut-off events. [2024-06-21 21:53:50,565 INFO L125 PetriNetUnfolderBase]: For 6329/6329 co-relation queries the response was YES. [2024-06-21 21:53:50,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 2276 events. 1499/2276 cut-off events. For 6329/6329 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10492 event pairs, 549 based on Foata normal form. 4/2278 useless extension candidates. Maximal degree in co-relation 8805. Up to 2246 conditions per place. [2024-06-21 21:53:50,577 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 63 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-21 21:53:50,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 642 flow [2024-06-21 21:53:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:53:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:53:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-21 21:53:50,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153846153846154 [2024-06-21 21:53:50,578 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 454 flow. Second operand 5 states and 81 transitions. [2024-06-21 21:53:50,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 642 flow [2024-06-21 21:53:50,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 582 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:50,584 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 444 flow [2024-06-21 21:53:50,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-06-21 21:53:50,587 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2024-06-21 21:53:50,587 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 444 flow [2024-06-21 21:53:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:50,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:50,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:50,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:53:50,588 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 21:53:50,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash -264995652, now seen corresponding path program 1 times [2024-06-21 21:53:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407109431] [2024-06-21 21:53:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:51,086 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 21:53:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:51,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407109431] [2024-06-21 21:53:51,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407109431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:51,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:51,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:51,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211681663] [2024-06-21 21:53:51,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:51,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:51,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:51,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:51,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:51,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:51,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:51,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:51,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:51,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:51,481 INFO L124 PetriNetUnfolderBase]: 1511/2295 cut-off events. [2024-06-21 21:53:51,481 INFO L125 PetriNetUnfolderBase]: For 7223/7225 co-relation queries the response was YES. [2024-06-21 21:53:51,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8919 conditions, 2295 events. 1511/2295 cut-off events. For 7223/7225 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10534 event pairs, 467 based on Foata normal form. 10/2303 useless extension candidates. Maximal degree in co-relation 8889. Up to 2144 conditions per place. [2024-06-21 21:53:51,505 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 70 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-21 21:53:51,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 734 flow [2024-06-21 21:53:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:53:51,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 21:53:51,507 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 444 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:53:51,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 734 flow [2024-06-21 21:53:51,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 712 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 21:53:51,515 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 514 flow [2024-06-21 21:53:51,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-21 21:53:51,516 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 28 predicate places. [2024-06-21 21:53:51,516 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 514 flow [2024-06-21 21:53:51,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:51,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:51,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:51,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:53:51,517 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 21:53:51,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash -226484508, now seen corresponding path program 2 times [2024-06-21 21:53:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:51,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190276687] [2024-06-21 21:53:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:51,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190276687] [2024-06-21 21:53:51,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190276687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:51,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:51,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:53:51,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984875791] [2024-06-21 21:53:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:51,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:53:51,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:53:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:53:51,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:51,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:51,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:51,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:51,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:52,278 INFO L124 PetriNetUnfolderBase]: 1488/2257 cut-off events. [2024-06-21 21:53:52,279 INFO L125 PetriNetUnfolderBase]: For 8431/8431 co-relation queries the response was YES. [2024-06-21 21:53:52,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9089 conditions, 2257 events. 1488/2257 cut-off events. For 8431/8431 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10259 event pairs, 509 based on Foata normal form. 4/2259 useless extension candidates. Maximal degree in co-relation 9057. Up to 2218 conditions per place. [2024-06-21 21:53:52,291 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 72 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-06-21 21:53:52,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 733 flow [2024-06-21 21:53:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 21:53:52,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2024-06-21 21:53:52,293 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 514 flow. Second operand 6 states and 95 transitions. [2024-06-21 21:53:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 733 flow [2024-06-21 21:53:52,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 86 transitions, 710 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 21:53:52,302 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 534 flow [2024-06-21 21:53:52,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=534, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-21 21:53:52,304 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-21 21:53:52,304 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 534 flow [2024-06-21 21:53:52,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:52,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:52,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:52,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:53:52,305 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:52,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash -259273796, now seen corresponding path program 1 times [2024-06-21 21:53:52,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:52,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050776458] [2024-06-21 21:53:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:53,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050776458] [2024-06-21 21:53:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050776458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:53,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:53,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252096737] [2024-06-21 21:53:53,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:53,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:53,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:53,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 534 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:53,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:53,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:53,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:53,468 INFO L124 PetriNetUnfolderBase]: 1480/2245 cut-off events. [2024-06-21 21:53:53,469 INFO L125 PetriNetUnfolderBase]: For 9870/9870 co-relation queries the response was YES. [2024-06-21 21:53:53,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9184 conditions, 2245 events. 1480/2245 cut-off events. For 9870/9870 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10180 event pairs, 490 based on Foata normal form. 4/2247 useless extension candidates. Maximal degree in co-relation 9151. Up to 2197 conditions per place. [2024-06-21 21:53:53,480 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 73 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-06-21 21:53:53,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 760 flow [2024-06-21 21:53:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 21:53:53,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2024-06-21 21:53:53,482 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 534 flow. Second operand 6 states and 95 transitions. [2024-06-21 21:53:53,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 760 flow [2024-06-21 21:53:53,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 736 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:53:53,491 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 561 flow [2024-06-21 21:53:53,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=561, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-21 21:53:53,491 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-06-21 21:53:53,492 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 561 flow [2024-06-21 21:53:53,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:53,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:53,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:53,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:53:53,492 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 21:53:53,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash 567051138, now seen corresponding path program 1 times [2024-06-21 21:53:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:53,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796899298] [2024-06-21 21:53:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:53,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:54,024 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 21:53:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796899298] [2024-06-21 21:53:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796899298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:54,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300101327] [2024-06-21 21:53:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:54,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:54,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:54,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:54,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:54,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:54,447 INFO L124 PetriNetUnfolderBase]: 1475/2238 cut-off events. [2024-06-21 21:53:54,447 INFO L125 PetriNetUnfolderBase]: For 11306/11306 co-relation queries the response was YES. [2024-06-21 21:53:54,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9445 conditions, 2238 events. 1475/2238 cut-off events. For 11306/11306 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10162 event pairs, 503 based on Foata normal form. 2/2238 useless extension candidates. Maximal degree in co-relation 9412. Up to 2181 conditions per place. [2024-06-21 21:53:54,459 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 69 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-21 21:53:54,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 88 transitions, 773 flow [2024-06-21 21:53:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:53:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:53:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:53:54,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 21:53:54,461 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 561 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:53:54,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 88 transitions, 773 flow [2024-06-21 21:53:54,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 88 transitions, 740 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:53:54,474 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 572 flow [2024-06-21 21:53:54,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=572, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-06-21 21:53:54,475 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 35 predicate places. [2024-06-21 21:53:54,477 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 572 flow [2024-06-21 21:53:54,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:54,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:54,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:53:54,478 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 21:53:54,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:54,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1261530661, now seen corresponding path program 1 times [2024-06-21 21:53:54,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:54,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840333834] [2024-06-21 21:53:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:54,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:55,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840333834] [2024-06-21 21:53:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840333834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:55,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:55,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:55,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399686824] [2024-06-21 21:53:55,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:55,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:55,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:55,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:55,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:55,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:55,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 572 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:55,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:55,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:55,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:55,527 INFO L124 PetriNetUnfolderBase]: 1497/2271 cut-off events. [2024-06-21 21:53:55,528 INFO L125 PetriNetUnfolderBase]: For 13266/13268 co-relation queries the response was YES. [2024-06-21 21:53:55,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9749 conditions, 2271 events. 1497/2271 cut-off events. For 13266/13268 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10410 event pairs, 430 based on Foata normal form. 4/2273 useless extension candidates. Maximal degree in co-relation 9715. Up to 2011 conditions per place. [2024-06-21 21:53:55,539 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 74 selfloop transitions, 33 changer transitions 0/110 dead transitions. [2024-06-21 21:53:55,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 110 transitions, 990 flow [2024-06-21 21:53:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:53:55,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 21:53:55,541 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 572 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:53:55,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 110 transitions, 990 flow [2024-06-21 21:53:55,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 948 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:55,551 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 650 flow [2024-06-21 21:53:55,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=650, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-21 21:53:55,552 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 37 predicate places. [2024-06-21 21:53:55,552 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 650 flow [2024-06-21 21:53:55,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:55,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:55,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:55,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:53:55,553 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 21:53:55,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash 250899877, now seen corresponding path program 2 times [2024-06-21 21:53:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:55,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112175477] [2024-06-21 21:53:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:56,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112175477] [2024-06-21 21:53:56,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112175477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:56,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:56,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828409679] [2024-06-21 21:53:56,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:56,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:56,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:56,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:56,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:56,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:56,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:56,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:56,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:56,493 INFO L124 PetriNetUnfolderBase]: 1487/2257 cut-off events. [2024-06-21 21:53:56,493 INFO L125 PetriNetUnfolderBase]: For 15407/15409 co-relation queries the response was YES. [2024-06-21 21:53:56,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10239 conditions, 2257 events. 1487/2257 cut-off events. For 15407/15409 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10306 event pairs, 440 based on Foata normal form. 4/2259 useless extension candidates. Maximal degree in co-relation 10204. Up to 2066 conditions per place. [2024-06-21 21:53:56,505 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 73 selfloop transitions, 29 changer transitions 0/105 dead transitions. [2024-06-21 21:53:56,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 970 flow [2024-06-21 21:53:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:53:56,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432234432234432 [2024-06-21 21:53:56,507 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 650 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:53:56,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 105 transitions, 970 flow [2024-06-21 21:53:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 921 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:53:56,522 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 667 flow [2024-06-21 21:53:56,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2024-06-21 21:53:56,523 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2024-06-21 21:53:56,523 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 667 flow [2024-06-21 21:53:56,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:56,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:56,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:53:56,523 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 21:53:56,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 254624899, now seen corresponding path program 1 times [2024-06-21 21:53:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:56,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074043634] [2024-06-21 21:53:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:57,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:57,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074043634] [2024-06-21 21:53:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074043634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:57,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:57,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:53:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234277456] [2024-06-21 21:53:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:57,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:53:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:53:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:53:57,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:57,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 667 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:57,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:57,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:57,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:57,764 INFO L124 PetriNetUnfolderBase]: 1521/2311 cut-off events. [2024-06-21 21:53:57,765 INFO L125 PetriNetUnfolderBase]: For 17967/17969 co-relation queries the response was YES. [2024-06-21 21:53:57,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10733 conditions, 2311 events. 1521/2311 cut-off events. For 17967/17969 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10623 event pairs, 428 based on Foata normal form. 10/2319 useless extension candidates. Maximal degree in co-relation 10696. Up to 2136 conditions per place. [2024-06-21 21:53:57,782 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 81 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-06-21 21:53:57,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 965 flow [2024-06-21 21:53:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:53:57,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43223443223443225 [2024-06-21 21:53:57,784 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 667 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:53:57,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 965 flow [2024-06-21 21:53:57,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 895 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:53:57,799 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 681 flow [2024-06-21 21:53:57,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=681, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-21 21:53:57,800 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 42 predicate places. [2024-06-21 21:53:57,800 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 681 flow [2024-06-21 21:53:57,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:57,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:57,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:57,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:53:57,801 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 21:53:57,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash 664270031, now seen corresponding path program 2 times [2024-06-21 21:53:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:57,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512858723] [2024-06-21 21:53:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:57,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:58,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:58,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512858723] [2024-06-21 21:53:58,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512858723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:58,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:58,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:53:58,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437512399] [2024-06-21 21:53:58,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:58,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:53:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:53:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:53:58,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:58,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 681 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:58,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:58,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:58,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:59,121 INFO L124 PetriNetUnfolderBase]: 1538/2337 cut-off events. [2024-06-21 21:53:59,121 INFO L125 PetriNetUnfolderBase]: For 20369/20369 co-relation queries the response was YES. [2024-06-21 21:53:59,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11212 conditions, 2337 events. 1538/2337 cut-off events. For 20369/20369 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10705 event pairs, 488 based on Foata normal form. 4/2339 useless extension candidates. Maximal degree in co-relation 11174. Up to 2257 conditions per place. [2024-06-21 21:53:59,134 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 83 selfloop transitions, 18 changer transitions 0/104 dead transitions. [2024-06-21 21:53:59,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 104 transitions, 961 flow [2024-06-21 21:53:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:53:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:53:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:53:59,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-21 21:53:59,136 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 681 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:53:59,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 104 transitions, 961 flow [2024-06-21 21:53:59,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 901 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:59,152 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 693 flow [2024-06-21 21:53:59,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=693, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2024-06-21 21:53:59,153 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 44 predicate places. [2024-06-21 21:53:59,153 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 693 flow [2024-06-21 21:53:59,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:59,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:59,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:59,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:53:59,154 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 21:53:59,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash 398717022, now seen corresponding path program 1 times [2024-06-21 21:53:59,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:59,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347210761] [2024-06-21 21:53:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:59,752 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 21:53:59,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:59,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347210761] [2024-06-21 21:53:59,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347210761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:59,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:59,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:53:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409467496] [2024-06-21 21:53:59,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:53:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:53:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:53:59,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:53:59,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 693 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:59,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:59,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:53:59,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:00,109 INFO L124 PetriNetUnfolderBase]: 1518/2298 cut-off events. [2024-06-21 21:54:00,110 INFO L125 PetriNetUnfolderBase]: For 22780/22782 co-relation queries the response was YES. [2024-06-21 21:54:00,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 2298 events. 1518/2298 cut-off events. For 22780/22782 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10449 event pairs, 437 based on Foata normal form. 2/2298 useless extension candidates. Maximal degree in co-relation 11167. Up to 2132 conditions per place. [2024-06-21 21:54:00,123 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 75 selfloop transitions, 28 changer transitions 0/106 dead transitions. [2024-06-21 21:54:00,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 961 flow [2024-06-21 21:54:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 21:54:00,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45726495726495725 [2024-06-21 21:54:00,125 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 693 flow. Second operand 6 states and 107 transitions. [2024-06-21 21:54:00,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 961 flow [2024-06-21 21:54:00,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 909 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:00,143 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 712 flow [2024-06-21 21:54:00,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=712, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2024-06-21 21:54:00,144 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 45 predicate places. [2024-06-21 21:54:00,144 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 712 flow [2024-06-21 21:54:00,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:00,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:00,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:00,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:54:00,145 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 21:54:00,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash 671686781, now seen corresponding path program 3 times [2024-06-21 21:54:00,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:00,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620273470] [2024-06-21 21:54:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:00,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:00,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:00,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620273470] [2024-06-21 21:54:00,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620273470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:00,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:00,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:00,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398472676] [2024-06-21 21:54:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:00,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:00,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:00,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 712 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:00,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:00,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:00,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:01,382 INFO L124 PetriNetUnfolderBase]: 1510/2285 cut-off events. [2024-06-21 21:54:01,383 INFO L125 PetriNetUnfolderBase]: For 24944/24944 co-relation queries the response was YES. [2024-06-21 21:54:01,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11331 conditions, 2285 events. 1510/2285 cut-off events. For 24944/24944 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10340 event pairs, 462 based on Foata normal form. 4/2287 useless extension candidates. Maximal degree in co-relation 11291. Up to 2214 conditions per place. [2024-06-21 21:54:01,397 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 89 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-21 21:54:01,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 106 transitions, 998 flow [2024-06-21 21:54:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 21:54:01,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992673992673993 [2024-06-21 21:54:01,399 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 712 flow. Second operand 7 states and 109 transitions. [2024-06-21 21:54:01,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 106 transitions, 998 flow [2024-06-21 21:54:01,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 106 transitions, 942 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:01,421 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 723 flow [2024-06-21 21:54:01,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=723, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-06-21 21:54:01,421 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-06-21 21:54:01,422 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 723 flow [2024-06-21 21:54:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:01,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:01,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:01,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:54:01,422 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:01,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2062042194, now seen corresponding path program 1 times [2024-06-21 21:54:01,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:01,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832077447] [2024-06-21 21:54:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:01,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832077447] [2024-06-21 21:54:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832077447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:01,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:01,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:54:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438609229] [2024-06-21 21:54:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:54:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:54:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:54:01,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:01,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:01,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:01,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:01,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:02,211 INFO L124 PetriNetUnfolderBase]: 1504/2277 cut-off events. [2024-06-21 21:54:02,211 INFO L125 PetriNetUnfolderBase]: For 27356/27356 co-relation queries the response was YES. [2024-06-21 21:54:02,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11468 conditions, 2277 events. 1504/2277 cut-off events. For 27356/27356 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10283 event pairs, 481 based on Foata normal form. 2/2277 useless extension candidates. Maximal degree in co-relation 11427. Up to 2256 conditions per place. [2024-06-21 21:54:02,225 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 84 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-06-21 21:54:02,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 97 transitions, 957 flow [2024-06-21 21:54:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:54:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:54:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-21 21:54:02,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:54:02,226 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 723 flow. Second operand 5 states and 78 transitions. [2024-06-21 21:54:02,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 97 transitions, 957 flow [2024-06-21 21:54:02,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 97 transitions, 908 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:02,245 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 730 flow [2024-06-21 21:54:02,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=730, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-21 21:54:02,246 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-06-21 21:54:02,246 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 730 flow [2024-06-21 21:54:02,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:02,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:02,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:02,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:54:02,246 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 21:54:02,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -452746627, now seen corresponding path program 1 times [2024-06-21 21:54:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:02,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228927344] [2024-06-21 21:54:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:02,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:02,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228927344] [2024-06-21 21:54:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228927344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:02,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:02,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804607821] [2024-06-21 21:54:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:02,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:02,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:02,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 730 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:02,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:02,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:02,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:03,345 INFO L124 PetriNetUnfolderBase]: 1623/2479 cut-off events. [2024-06-21 21:54:03,346 INFO L125 PetriNetUnfolderBase]: For 34438/34440 co-relation queries the response was YES. [2024-06-21 21:54:03,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12736 conditions, 2479 events. 1623/2479 cut-off events. For 34438/34440 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11628 event pairs, 287 based on Foata normal form. 16/2493 useless extension candidates. Maximal degree in co-relation 12694. Up to 1806 conditions per place. [2024-06-21 21:54:03,362 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 36 changer transitions 0/132 dead transitions. [2024-06-21 21:54:03,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 1214 flow [2024-06-21 21:54:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:54:03,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:54:03,364 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 730 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:54:03,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 1214 flow [2024-06-21 21:54:03,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 132 transitions, 1180 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:54:03,389 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 812 flow [2024-06-21 21:54:03,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=812, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-21 21:54:03,390 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 52 predicate places. [2024-06-21 21:54:03,390 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 812 flow [2024-06-21 21:54:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:03,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:03,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:54:03,390 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 21:54:03,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -452743837, now seen corresponding path program 2 times [2024-06-21 21:54:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:03,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516307380] [2024-06-21 21:54:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:03,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:04,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:04,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516307380] [2024-06-21 21:54:04,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516307380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:04,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:04,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:04,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908861820] [2024-06-21 21:54:04,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:04,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:04,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:04,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:04,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:04,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:04,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 812 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:04,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:04,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:04,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:04,497 INFO L124 PetriNetUnfolderBase]: 1698/2604 cut-off events. [2024-06-21 21:54:04,497 INFO L125 PetriNetUnfolderBase]: For 39586/39588 co-relation queries the response was YES. [2024-06-21 21:54:04,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13669 conditions, 2604 events. 1698/2604 cut-off events. For 39586/39588 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12460 event pairs, 456 based on Foata normal form. 20/2622 useless extension candidates. Maximal degree in co-relation 13626. Up to 2234 conditions per place. [2024-06-21 21:54:04,541 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 91 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-21 21:54:04,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 128 transitions, 1190 flow [2024-06-21 21:54:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:54:04,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 21:54:04,545 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 812 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:54:04,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 128 transitions, 1190 flow [2024-06-21 21:54:04,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 128 transitions, 1141 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:04,579 INFO L231 Difference]: Finished difference. Result has 96 places, 91 transitions, 860 flow [2024-06-21 21:54:04,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2024-06-21 21:54:04,580 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 56 predicate places. [2024-06-21 21:54:04,580 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 860 flow [2024-06-21 21:54:04,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:04,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:04,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:04,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:54:04,581 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 21:54:04,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash -449947327, now seen corresponding path program 3 times [2024-06-21 21:54:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:04,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651977975] [2024-06-21 21:54:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:04,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:05,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:05,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651977975] [2024-06-21 21:54:05,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651977975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:05,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:05,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:05,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859927101] [2024-06-21 21:54:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:05,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:05,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:05,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:05,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:05,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:05,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:05,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:05,858 INFO L124 PetriNetUnfolderBase]: 1703/2619 cut-off events. [2024-06-21 21:54:05,858 INFO L125 PetriNetUnfolderBase]: For 42493/42495 co-relation queries the response was YES. [2024-06-21 21:54:05,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13656 conditions, 2619 events. 1703/2619 cut-off events. For 42493/42495 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12604 event pairs, 471 based on Foata normal form. 34/2651 useless extension candidates. Maximal degree in co-relation 13611. Up to 2232 conditions per place. [2024-06-21 21:54:05,875 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 97 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2024-06-21 21:54:05,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 1226 flow [2024-06-21 21:54:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:54:05,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-21 21:54:05,877 INFO L175 Difference]: Start difference. First operand has 96 places, 91 transitions, 860 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:54:05,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 1226 flow [2024-06-21 21:54:05,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 126 transitions, 1143 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:05,925 INFO L231 Difference]: Finished difference. Result has 98 places, 92 transitions, 862 flow [2024-06-21 21:54:05,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=98, PETRI_TRANSITIONS=92} [2024-06-21 21:54:05,926 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 58 predicate places. [2024-06-21 21:54:05,926 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 92 transitions, 862 flow [2024-06-21 21:54:05,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:05,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:05,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:05,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:54:05,926 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:05,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash -334478217, now seen corresponding path program 1 times [2024-06-21 21:54:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930551882] [2024-06-21 21:54:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:05,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:06,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:06,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930551882] [2024-06-21 21:54:06,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930551882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:06,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:06,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:06,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237132558] [2024-06-21 21:54:06,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:06,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:06,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:06,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:06,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 92 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:06,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:06,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:06,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:07,118 INFO L124 PetriNetUnfolderBase]: 1720/2646 cut-off events. [2024-06-21 21:54:07,119 INFO L125 PetriNetUnfolderBase]: For 40087/40089 co-relation queries the response was YES. [2024-06-21 21:54:07,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13827 conditions, 2646 events. 1720/2646 cut-off events. For 40087/40089 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12776 event pairs, 471 based on Foata normal form. 6/2650 useless extension candidates. Maximal degree in co-relation 13781. Up to 2489 conditions per place. [2024-06-21 21:54:07,134 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 97 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-21 21:54:07,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 122 transitions, 1204 flow [2024-06-21 21:54:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:54:07,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-21 21:54:07,136 INFO L175 Difference]: Start difference. First operand has 98 places, 92 transitions, 862 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:54:07,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 122 transitions, 1204 flow [2024-06-21 21:54:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 1147 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:07,180 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 890 flow [2024-06-21 21:54:07,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2024-06-21 21:54:07,180 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-21 21:54:07,180 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 890 flow [2024-06-21 21:54:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:07,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:07,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:07,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:54:07,181 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:07,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:07,181 INFO L85 PathProgramCache]: Analyzing trace with hash -169320881, now seen corresponding path program 2 times [2024-06-21 21:54:07,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:07,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000698235] [2024-06-21 21:54:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:07,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:07,859 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 21:54:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000698235] [2024-06-21 21:54:07,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000698235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:07,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:07,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511483443] [2024-06-21 21:54:07,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:07,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:07,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:07,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:07,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:07,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:07,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:07,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:08,289 INFO L124 PetriNetUnfolderBase]: 1754/2700 cut-off events. [2024-06-21 21:54:08,290 INFO L125 PetriNetUnfolderBase]: For 43707/43709 co-relation queries the response was YES. [2024-06-21 21:54:08,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14226 conditions, 2700 events. 1754/2700 cut-off events. For 43707/43709 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13126 event pairs, 462 based on Foata normal form. 6/2704 useless extension candidates. Maximal degree in co-relation 14179. Up to 2456 conditions per place. [2024-06-21 21:54:08,307 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 95 selfloop transitions, 25 changer transitions 0/123 dead transitions. [2024-06-21 21:54:08,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 123 transitions, 1236 flow [2024-06-21 21:54:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:54:08,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-21 21:54:08,308 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 890 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:54:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 123 transitions, 1236 flow [2024-06-21 21:54:08,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 123 transitions, 1169 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:08,343 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 941 flow [2024-06-21 21:54:08,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=941, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2024-06-21 21:54:08,344 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-21 21:54:08,344 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 941 flow [2024-06-21 21:54:08,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:08,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:08,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:08,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:54:08,344 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:08,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash -660826061, now seen corresponding path program 3 times [2024-06-21 21:54:08,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:08,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703876344] [2024-06-21 21:54:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:09,210 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 21:54:09,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703876344] [2024-06-21 21:54:09,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703876344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:09,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:09,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:09,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972645643] [2024-06-21 21:54:09,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:09,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:09,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:09,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:09,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:09,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:09,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 941 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:09,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:09,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:09,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:09,679 INFO L124 PetriNetUnfolderBase]: 1771/2727 cut-off events. [2024-06-21 21:54:09,679 INFO L125 PetriNetUnfolderBase]: For 48085/48087 co-relation queries the response was YES. [2024-06-21 21:54:09,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14701 conditions, 2727 events. 1771/2727 cut-off events. For 48085/48087 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13209 event pairs, 480 based on Foata normal form. 4/2729 useless extension candidates. Maximal degree in co-relation 14652. Up to 2525 conditions per place. [2024-06-21 21:54:09,697 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-21 21:54:09,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 128 transitions, 1303 flow [2024-06-21 21:54:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:54:09,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432234432234432 [2024-06-21 21:54:09,699 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 941 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:54:09,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 128 transitions, 1303 flow [2024-06-21 21:54:09,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 128 transitions, 1237 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:09,759 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 991 flow [2024-06-21 21:54:09,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=991, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-06-21 21:54:09,760 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-21 21:54:09,760 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 991 flow [2024-06-21 21:54:09,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:09,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:09,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:54:09,761 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:09,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash -660819551, now seen corresponding path program 4 times [2024-06-21 21:54:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:09,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194677648] [2024-06-21 21:54:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:09,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:10,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:10,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194677648] [2024-06-21 21:54:10,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194677648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:10,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:10,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099398630] [2024-06-21 21:54:10,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:10,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:10,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:10,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 991 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:10,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:10,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:10,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:11,104 INFO L124 PetriNetUnfolderBase]: 1788/2754 cut-off events. [2024-06-21 21:54:11,105 INFO L125 PetriNetUnfolderBase]: For 52813/52815 co-relation queries the response was YES. [2024-06-21 21:54:11,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15153 conditions, 2754 events. 1788/2754 cut-off events. For 52813/52815 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13434 event pairs, 471 based on Foata normal form. 4/2756 useless extension candidates. Maximal degree in co-relation 15103. Up to 2424 conditions per place. [2024-06-21 21:54:11,120 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 86 selfloop transitions, 38 changer transitions 0/127 dead transitions. [2024-06-21 21:54:11,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 127 transitions, 1345 flow [2024-06-21 21:54:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:54:11,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:54:11,121 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 991 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:54:11,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 127 transitions, 1345 flow [2024-06-21 21:54:11,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 127 transitions, 1245 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:11,174 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 1024 flow [2024-06-21 21:54:11,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1024, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2024-06-21 21:54:11,174 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 67 predicate places. [2024-06-21 21:54:11,174 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 1024 flow [2024-06-21 21:54:11,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:11,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:11,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:11,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:54:11,175 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:11,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash 201237915, now seen corresponding path program 5 times [2024-06-21 21:54:11,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:11,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918608398] [2024-06-21 21:54:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:11,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:11,749 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 21:54:11,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:11,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918608398] [2024-06-21 21:54:11,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918608398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:11,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:11,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:11,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574280531] [2024-06-21 21:54:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:11,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:11,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:11,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 1024 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:11,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:11,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:11,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:12,233 INFO L124 PetriNetUnfolderBase]: 1780/2742 cut-off events. [2024-06-21 21:54:12,233 INFO L125 PetriNetUnfolderBase]: For 51467/51469 co-relation queries the response was YES. [2024-06-21 21:54:12,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14976 conditions, 2742 events. 1780/2742 cut-off events. For 51467/51469 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13292 event pairs, 528 based on Foata normal form. 4/2744 useless extension candidates. Maximal degree in co-relation 14925. Up to 2647 conditions per place. [2024-06-21 21:54:12,249 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 108 selfloop transitions, 15 changer transitions 0/126 dead transitions. [2024-06-21 21:54:12,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 126 transitions, 1366 flow [2024-06-21 21:54:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:54:12,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-21 21:54:12,250 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 1024 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:54:12,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 126 transitions, 1366 flow [2024-06-21 21:54:12,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 126 transitions, 1255 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:12,306 INFO L231 Difference]: Finished difference. Result has 109 places, 104 transitions, 996 flow [2024-06-21 21:54:12,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=996, PETRI_PLACES=109, PETRI_TRANSITIONS=104} [2024-06-21 21:54:12,306 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2024-06-21 21:54:12,306 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 104 transitions, 996 flow [2024-06-21 21:54:12,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:12,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:12,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:12,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:54:12,307 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 21:54:12,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1330370046, now seen corresponding path program 1 times [2024-06-21 21:54:12,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097561093] [2024-06-21 21:54:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:12,696 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 21:54:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:12,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097561093] [2024-06-21 21:54:12,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097561093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:12,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:12,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:54:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641401550] [2024-06-21 21:54:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:54:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:54:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:54:12,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:12,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 104 transitions, 996 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:12,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:12,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:12,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:13,196 INFO L124 PetriNetUnfolderBase]: 1790/2755 cut-off events. [2024-06-21 21:54:13,197 INFO L125 PetriNetUnfolderBase]: For 50146/50146 co-relation queries the response was YES. [2024-06-21 21:54:13,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14829 conditions, 2755 events. 1790/2755 cut-off events. For 50146/50146 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13456 event pairs, 545 based on Foata normal form. 2/2755 useless extension candidates. Maximal degree in co-relation 14777. Up to 2705 conditions per place. [2024-06-21 21:54:13,211 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 104 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2024-06-21 21:54:13,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 125 transitions, 1378 flow [2024-06-21 21:54:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 21:54:13,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2024-06-21 21:54:13,212 INFO L175 Difference]: Start difference. First operand has 109 places, 104 transitions, 996 flow. Second operand 6 states and 95 transitions. [2024-06-21 21:54:13,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 125 transitions, 1378 flow [2024-06-21 21:54:13,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 125 transitions, 1317 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:13,281 INFO L231 Difference]: Finished difference. Result has 110 places, 110 transitions, 1036 flow [2024-06-21 21:54:13,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=110, PETRI_TRANSITIONS=110} [2024-06-21 21:54:13,282 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-21 21:54:13,282 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 110 transitions, 1036 flow [2024-06-21 21:54:13,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:13,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:13,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:13,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:54:13,283 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 21:54:13,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1674663332, now seen corresponding path program 2 times [2024-06-21 21:54:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:13,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754678548] [2024-06-21 21:54:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:13,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754678548] [2024-06-21 21:54:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754678548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:13,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:13,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:54:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440881684] [2024-06-21 21:54:13,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:13,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:54:13,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:54:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:54:13,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:13,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 110 transitions, 1036 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:13,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:13,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:13,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:14,068 INFO L124 PetriNetUnfolderBase]: 1784/2747 cut-off events. [2024-06-21 21:54:14,068 INFO L125 PetriNetUnfolderBase]: For 53529/53529 co-relation queries the response was YES. [2024-06-21 21:54:14,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15074 conditions, 2747 events. 1784/2747 cut-off events. For 53529/53529 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13428 event pairs, 544 based on Foata normal form. 2/2747 useless extension candidates. Maximal degree in co-relation 15021. Up to 2708 conditions per place. [2024-06-21 21:54:14,086 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 104 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2024-06-21 21:54:14,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 122 transitions, 1306 flow [2024-06-21 21:54:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:54:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:54:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-21 21:54:14,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205128205128205 [2024-06-21 21:54:14,087 INFO L175 Difference]: Start difference. First operand has 110 places, 110 transitions, 1036 flow. Second operand 5 states and 82 transitions. [2024-06-21 21:54:14,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 122 transitions, 1306 flow [2024-06-21 21:54:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 122 transitions, 1268 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:14,156 INFO L231 Difference]: Finished difference. Result has 113 places, 110 transitions, 1040 flow [2024-06-21 21:54:14,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1040, PETRI_PLACES=113, PETRI_TRANSITIONS=110} [2024-06-21 21:54:14,157 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 73 predicate places. [2024-06-21 21:54:14,157 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 110 transitions, 1040 flow [2024-06-21 21:54:14,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:14,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:14,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:14,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:54:14,157 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 21:54:14,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1967991496, now seen corresponding path program 1 times [2024-06-21 21:54:14,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:14,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358588523] [2024-06-21 21:54:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:14,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358588523] [2024-06-21 21:54:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358588523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:14,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:14,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526204482] [2024-06-21 21:54:14,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:14,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:14,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:14,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 110 transitions, 1040 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:14,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:14,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:14,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:15,085 INFO L124 PetriNetUnfolderBase]: 1831/2813 cut-off events. [2024-06-21 21:54:15,086 INFO L125 PetriNetUnfolderBase]: For 58818/58820 co-relation queries the response was YES. [2024-06-21 21:54:15,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15647 conditions, 2813 events. 1831/2813 cut-off events. For 58818/58820 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13747 event pairs, 486 based on Foata normal form. 5/2816 useless extension candidates. Maximal degree in co-relation 15592. Up to 2595 conditions per place. [2024-06-21 21:54:15,105 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 115 selfloop transitions, 36 changer transitions 0/154 dead transitions. [2024-06-21 21:54:15,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 154 transitions, 1686 flow [2024-06-21 21:54:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:54:15,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-21 21:54:15,106 INFO L175 Difference]: Start difference. First operand has 113 places, 110 transitions, 1040 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:54:15,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 154 transitions, 1686 flow [2024-06-21 21:54:15,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 154 transitions, 1652 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:15,175 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1308 flow [2024-06-21 21:54:15,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=118, PETRI_TRANSITIONS=127} [2024-06-21 21:54:15,176 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2024-06-21 21:54:15,176 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1308 flow [2024-06-21 21:54:15,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:15,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:15,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:15,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:54:15,177 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:15,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1778889176, now seen corresponding path program 1 times [2024-06-21 21:54:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:15,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931012714] [2024-06-21 21:54:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:15,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:15,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931012714] [2024-06-21 21:54:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931012714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:15,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:15,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:15,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229896626] [2024-06-21 21:54:15,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:15,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:15,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:16,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:16,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 1308 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:16,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:16,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:16,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:16,586 INFO L124 PetriNetUnfolderBase]: 1872/2884 cut-off events. [2024-06-21 21:54:16,586 INFO L125 PetriNetUnfolderBase]: For 68748/68750 co-relation queries the response was YES. [2024-06-21 21:54:16,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17002 conditions, 2884 events. 1872/2884 cut-off events. For 68748/68750 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14241 event pairs, 487 based on Foata normal form. 12/2894 useless extension candidates. Maximal degree in co-relation 16944. Up to 2603 conditions per place. [2024-06-21 21:54:16,607 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 33 changer transitions 0/163 dead transitions. [2024-06-21 21:54:16,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 163 transitions, 1754 flow [2024-06-21 21:54:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:54:16,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 21:54:16,608 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1308 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:54:16,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 163 transitions, 1754 flow [2024-06-21 21:54:16,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 163 transitions, 1704 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 21:54:16,678 INFO L231 Difference]: Finished difference. Result has 125 places, 128 transitions, 1361 flow [2024-06-21 21:54:16,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1361, PETRI_PLACES=125, PETRI_TRANSITIONS=128} [2024-06-21 21:54:16,679 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2024-06-21 21:54:16,679 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 128 transitions, 1361 flow [2024-06-21 21:54:16,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:16,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:16,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:16,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:54:16,680 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 21:54:16,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash -118578206, now seen corresponding path program 2 times [2024-06-21 21:54:16,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:16,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269397538] [2024-06-21 21:54:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:17,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:17,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269397538] [2024-06-21 21:54:17,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269397538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:17,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:17,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:17,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253162283] [2024-06-21 21:54:17,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:17,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:17,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:17,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:17,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 128 transitions, 1361 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:17,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:17,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:17,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:18,104 INFO L124 PetriNetUnfolderBase]: 1913/2955 cut-off events. [2024-06-21 21:54:18,104 INFO L125 PetriNetUnfolderBase]: For 75541/75543 co-relation queries the response was YES. [2024-06-21 21:54:18,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17621 conditions, 2955 events. 1913/2955 cut-off events. For 75541/75543 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14755 event pairs, 483 based on Foata normal form. 12/2965 useless extension candidates. Maximal degree in co-relation 17560. Up to 2546 conditions per place. [2024-06-21 21:54:18,126 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 119 selfloop transitions, 39 changer transitions 0/161 dead transitions. [2024-06-21 21:54:18,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 161 transitions, 1793 flow [2024-06-21 21:54:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:54:18,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-21 21:54:18,127 INFO L175 Difference]: Start difference. First operand has 125 places, 128 transitions, 1361 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:54:18,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 161 transitions, 1793 flow [2024-06-21 21:54:18,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 161 transitions, 1706 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:18,221 INFO L231 Difference]: Finished difference. Result has 127 places, 129 transitions, 1391 flow [2024-06-21 21:54:18,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1391, PETRI_PLACES=127, PETRI_TRANSITIONS=129} [2024-06-21 21:54:18,222 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 87 predicate places. [2024-06-21 21:54:18,223 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 129 transitions, 1391 flow [2024-06-21 21:54:18,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:18,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:18,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:18,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:54:18,223 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:18,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1967722385, now seen corresponding path program 1 times [2024-06-21 21:54:18,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:18,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012115130] [2024-06-21 21:54:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:18,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:18,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:18,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012115130] [2024-06-21 21:54:18,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012115130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:18,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:18,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:18,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189164143] [2024-06-21 21:54:18,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:18,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:18,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:18,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 129 transitions, 1391 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:18,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:18,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:18,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:19,209 INFO L124 PetriNetUnfolderBase]: 1928/2975 cut-off events. [2024-06-21 21:54:19,210 INFO L125 PetriNetUnfolderBase]: For 75883/75883 co-relation queries the response was YES. [2024-06-21 21:54:19,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 2975 events. 1928/2975 cut-off events. For 75883/75883 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14796 event pairs, 580 based on Foata normal form. 2/2975 useless extension candidates. Maximal degree in co-relation 17789. Up to 2914 conditions per place. [2024-06-21 21:54:19,233 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 132 selfloop transitions, 23 changer transitions 0/158 dead transitions. [2024-06-21 21:54:19,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 158 transitions, 1899 flow [2024-06-21 21:54:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:54:19,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 21:54:19,236 INFO L175 Difference]: Start difference. First operand has 127 places, 129 transitions, 1391 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:54:19,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 158 transitions, 1899 flow [2024-06-21 21:54:19,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 158 transitions, 1798 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:19,322 INFO L231 Difference]: Finished difference. Result has 129 places, 138 transitions, 1448 flow [2024-06-21 21:54:19,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=129, PETRI_TRANSITIONS=138} [2024-06-21 21:54:19,322 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-21 21:54:19,322 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 138 transitions, 1448 flow [2024-06-21 21:54:19,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:19,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:19,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:19,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:54:19,324 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:19,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1207107258, now seen corresponding path program 2 times [2024-06-21 21:54:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:19,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115849332] [2024-06-21 21:54:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:19,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:19,865 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 21:54:19,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115849332] [2024-06-21 21:54:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115849332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:19,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:19,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:19,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664527843] [2024-06-21 21:54:19,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:19,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:19,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 138 transitions, 1448 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:19,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:19,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:19,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:20,472 INFO L124 PetriNetUnfolderBase]: 1979/3046 cut-off events. [2024-06-21 21:54:20,472 INFO L125 PetriNetUnfolderBase]: For 81463/81463 co-relation queries the response was YES. [2024-06-21 21:54:20,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18492 conditions, 3046 events. 1979/3046 cut-off events. For 81463/81463 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15185 event pairs, 583 based on Foata normal form. 3/3047 useless extension candidates. Maximal degree in co-relation 18428. Up to 2978 conditions per place. [2024-06-21 21:54:20,497 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 139 selfloop transitions, 24 changer transitions 0/166 dead transitions. [2024-06-21 21:54:20,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 166 transitions, 1991 flow [2024-06-21 21:54:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 21:54:20,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391025641025641 [2024-06-21 21:54:20,499 INFO L175 Difference]: Start difference. First operand has 129 places, 138 transitions, 1448 flow. Second operand 8 states and 122 transitions. [2024-06-21 21:54:20,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 166 transitions, 1991 flow [2024-06-21 21:54:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1947 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:20,606 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1585 flow [2024-06-21 21:54:20,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1585, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-06-21 21:54:20,607 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-21 21:54:20,607 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1585 flow [2024-06-21 21:54:20,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:20,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:20,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:20,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:54:20,608 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:20,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -341912966, now seen corresponding path program 3 times [2024-06-21 21:54:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:20,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503456652] [2024-06-21 21:54:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:21,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:21,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503456652] [2024-06-21 21:54:21,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503456652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:21,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:21,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:21,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377308604] [2024-06-21 21:54:21,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:21,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:21,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:21,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:21,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:21,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1585 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:21,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:21,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:21,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:21,959 INFO L124 PetriNetUnfolderBase]: 1959/3015 cut-off events. [2024-06-21 21:54:21,959 INFO L125 PetriNetUnfolderBase]: For 85311/85313 co-relation queries the response was YES. [2024-06-21 21:54:21,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18308 conditions, 3015 events. 1959/3015 cut-off events. For 85311/85313 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14942 event pairs, 539 based on Foata normal form. 12/3025 useless extension candidates. Maximal degree in co-relation 18241. Up to 2851 conditions per place. [2024-06-21 21:54:21,982 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 155 selfloop transitions, 16 changer transitions 0/174 dead transitions. [2024-06-21 21:54:21,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 174 transitions, 1951 flow [2024-06-21 21:54:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:54:21,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-21 21:54:21,984 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1585 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:54:21,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 174 transitions, 1951 flow [2024-06-21 21:54:22,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 174 transitions, 1851 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 21:54:22,090 INFO L231 Difference]: Finished difference. Result has 136 places, 145 transitions, 1471 flow [2024-06-21 21:54:22,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1471, PETRI_PLACES=136, PETRI_TRANSITIONS=145} [2024-06-21 21:54:22,090 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-21 21:54:22,090 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 145 transitions, 1471 flow [2024-06-21 21:54:22,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:22,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:22,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:22,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:54:22,091 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 21:54:22,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1642595315, now seen corresponding path program 2 times [2024-06-21 21:54:22,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:22,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287678153] [2024-06-21 21:54:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:22,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:22,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:22,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287678153] [2024-06-21 21:54:22,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287678153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:22,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:22,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:22,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526122554] [2024-06-21 21:54:22,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:22,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:22,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:22,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:22,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:22,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:22,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 145 transitions, 1471 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:22,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:22,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:22,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:23,003 INFO L124 PetriNetUnfolderBase]: 1969/3028 cut-off events. [2024-06-21 21:54:23,003 INFO L125 PetriNetUnfolderBase]: For 81847/81847 co-relation queries the response was YES. [2024-06-21 21:54:23,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18262 conditions, 3028 events. 1969/3028 cut-off events. For 81847/81847 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15037 event pairs, 570 based on Foata normal form. 2/3028 useless extension candidates. Maximal degree in co-relation 18196. Up to 3001 conditions per place. [2024-06-21 21:54:23,024 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 142 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-06-21 21:54:23,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 161 transitions, 1865 flow [2024-06-21 21:54:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-21 21:54:23,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2024-06-21 21:54:23,027 INFO L175 Difference]: Start difference. First operand has 136 places, 145 transitions, 1471 flow. Second operand 6 states and 89 transitions. [2024-06-21 21:54:23,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 161 transitions, 1865 flow [2024-06-21 21:54:23,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 161 transitions, 1801 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 21:54:23,129 INFO L231 Difference]: Finished difference. Result has 136 places, 151 transitions, 1511 flow [2024-06-21 21:54:23,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1511, PETRI_PLACES=136, PETRI_TRANSITIONS=151} [2024-06-21 21:54:23,130 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-21 21:54:23,130 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 151 transitions, 1511 flow [2024-06-21 21:54:23,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:23,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:23,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:23,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:54:23,130 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 21:54:23,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash -24385338, now seen corresponding path program 3 times [2024-06-21 21:54:23,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:23,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745274741] [2024-06-21 21:54:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:23,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:23,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:23,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745274741] [2024-06-21 21:54:23,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745274741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:23,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:23,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:23,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535763018] [2024-06-21 21:54:23,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:23,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:23,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:23,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:23,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 151 transitions, 1511 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:23,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:23,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:23,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:24,246 INFO L124 PetriNetUnfolderBase]: 2012/3088 cut-off events. [2024-06-21 21:54:24,247 INFO L125 PetriNetUnfolderBase]: For 82314/82314 co-relation queries the response was YES. [2024-06-21 21:54:24,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18659 conditions, 3088 events. 2012/3088 cut-off events. For 82314/82314 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15408 event pairs, 502 based on Foata normal form. 3/3089 useless extension candidates. Maximal degree in co-relation 18592. Up to 2907 conditions per place. [2024-06-21 21:54:24,268 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 148 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2024-06-21 21:54:24,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 187 transitions, 2124 flow [2024-06-21 21:54:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:54:24,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468864468864469 [2024-06-21 21:54:24,270 INFO L175 Difference]: Start difference. First operand has 136 places, 151 transitions, 1511 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:54:24,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 187 transitions, 2124 flow [2024-06-21 21:54:24,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 187 transitions, 2080 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:24,388 INFO L231 Difference]: Finished difference. Result has 143 places, 159 transitions, 1706 flow [2024-06-21 21:54:24,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1706, PETRI_PLACES=143, PETRI_TRANSITIONS=159} [2024-06-21 21:54:24,389 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 21:54:24,389 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 159 transitions, 1706 flow [2024-06-21 21:54:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:24,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:24,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:24,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:54:24,390 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 21:54:24,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash 374772557, now seen corresponding path program 3 times [2024-06-21 21:54:24,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:24,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311213457] [2024-06-21 21:54:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:24,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:24,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311213457] [2024-06-21 21:54:24,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311213457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:24,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:24,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:24,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815969066] [2024-06-21 21:54:24,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:24,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:24,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:24,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:24,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:24,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 159 transitions, 1706 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:24,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:24,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:24,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:25,263 INFO L124 PetriNetUnfolderBase]: 2014/3091 cut-off events. [2024-06-21 21:54:25,263 INFO L125 PetriNetUnfolderBase]: For 87391/87391 co-relation queries the response was YES. [2024-06-21 21:54:25,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19137 conditions, 3091 events. 2014/3091 cut-off events. For 87391/87391 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15361 event pairs, 576 based on Foata normal form. 2/3091 useless extension candidates. Maximal degree in co-relation 19066. Up to 3027 conditions per place. [2024-06-21 21:54:25,334 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 146 selfloop transitions, 31 changer transitions 0/180 dead transitions. [2024-06-21 21:54:25,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 180 transitions, 2218 flow [2024-06-21 21:54:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 21:54:25,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2024-06-21 21:54:25,336 INFO L175 Difference]: Start difference. First operand has 143 places, 159 transitions, 1706 flow. Second operand 6 states and 100 transitions. [2024-06-21 21:54:25,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 180 transitions, 2218 flow [2024-06-21 21:54:25,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 180 transitions, 2150 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 21:54:25,472 INFO L231 Difference]: Finished difference. Result has 146 places, 162 transitions, 1758 flow [2024-06-21 21:54:25,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1758, PETRI_PLACES=146, PETRI_TRANSITIONS=162} [2024-06-21 21:54:25,472 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 106 predicate places. [2024-06-21 21:54:25,473 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 162 transitions, 1758 flow [2024-06-21 21:54:25,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:25,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:25,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:25,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:54:25,473 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 21:54:25,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash -273141159, now seen corresponding path program 1 times [2024-06-21 21:54:25,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:25,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409685996] [2024-06-21 21:54:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:26,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:26,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409685996] [2024-06-21 21:54:26,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409685996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:26,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:26,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:26,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558729721] [2024-06-21 21:54:26,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:26,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:26,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:26,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:26,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:26,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 162 transitions, 1758 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:26,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:26,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:26,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:26,657 INFO L124 PetriNetUnfolderBase]: 2034/3119 cut-off events. [2024-06-21 21:54:26,657 INFO L125 PetriNetUnfolderBase]: For 93331/93331 co-relation queries the response was YES. [2024-06-21 21:54:26,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19304 conditions, 3119 events. 2034/3119 cut-off events. For 93331/93331 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15522 event pairs, 574 based on Foata normal form. 4/3121 useless extension candidates. Maximal degree in co-relation 19232. Up to 3022 conditions per place. [2024-06-21 21:54:26,683 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 153 selfloop transitions, 30 changer transitions 0/186 dead transitions. [2024-06-21 21:54:26,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 186 transitions, 2302 flow [2024-06-21 21:54:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 21:54:26,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2024-06-21 21:54:26,685 INFO L175 Difference]: Start difference. First operand has 146 places, 162 transitions, 1758 flow. Second operand 7 states and 111 transitions. [2024-06-21 21:54:26,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 186 transitions, 2302 flow [2024-06-21 21:54:26,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 186 transitions, 2222 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:26,829 INFO L231 Difference]: Finished difference. Result has 149 places, 168 transitions, 1813 flow [2024-06-21 21:54:26,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1813, PETRI_PLACES=149, PETRI_TRANSITIONS=168} [2024-06-21 21:54:26,830 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 21:54:26,830 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 168 transitions, 1813 flow [2024-06-21 21:54:26,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:26,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:26,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:26,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:54:26,831 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 21:54:26,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash 374957069, now seen corresponding path program 2 times [2024-06-21 21:54:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:26,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242430874] [2024-06-21 21:54:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:26,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:27,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242430874] [2024-06-21 21:54:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242430874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:27,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948601533] [2024-06-21 21:54:27,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:27,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:27,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:27,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 168 transitions, 1813 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:27,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:27,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:27,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:27,928 INFO L124 PetriNetUnfolderBase]: 2054/3147 cut-off events. [2024-06-21 21:54:27,929 INFO L125 PetriNetUnfolderBase]: For 94260/94260 co-relation queries the response was YES. [2024-06-21 21:54:27,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19670 conditions, 3147 events. 2054/3147 cut-off events. For 94260/94260 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15679 event pairs, 578 based on Foata normal form. 4/3149 useless extension candidates. Maximal degree in co-relation 19598. Up to 3062 conditions per place. [2024-06-21 21:54:27,955 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 158 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2024-06-21 21:54:27,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 188 transitions, 2335 flow [2024-06-21 21:54:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 21:54:27,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-21 21:54:27,957 INFO L175 Difference]: Start difference. First operand has 149 places, 168 transitions, 1813 flow. Second operand 6 states and 99 transitions. [2024-06-21 21:54:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 188 transitions, 2335 flow [2024-06-21 21:54:28,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 188 transitions, 2290 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 21:54:28,088 INFO L231 Difference]: Finished difference. Result has 152 places, 171 transitions, 1865 flow [2024-06-21 21:54:28,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1865, PETRI_PLACES=152, PETRI_TRANSITIONS=171} [2024-06-21 21:54:28,088 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 21:54:28,088 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 171 transitions, 1865 flow [2024-06-21 21:54:28,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:28,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:28,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:28,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:54:28,089 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 21:54:28,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash 375164459, now seen corresponding path program 3 times [2024-06-21 21:54:28,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:28,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299082544] [2024-06-21 21:54:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:28,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:28,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299082544] [2024-06-21 21:54:28,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299082544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:28,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:28,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:28,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807479058] [2024-06-21 21:54:28,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:28,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:28,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:28,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:28,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:28,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:28,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 171 transitions, 1865 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:28,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:28,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:28,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:29,193 INFO L124 PetriNetUnfolderBase]: 2042/3131 cut-off events. [2024-06-21 21:54:29,193 INFO L125 PetriNetUnfolderBase]: For 97106/97106 co-relation queries the response was YES. [2024-06-21 21:54:29,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19646 conditions, 3131 events. 2042/3131 cut-off events. For 97106/97106 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15561 event pairs, 570 based on Foata normal form. 4/3133 useless extension candidates. Maximal degree in co-relation 19572. Up to 3054 conditions per place. [2024-06-21 21:54:29,216 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 158 selfloop transitions, 28 changer transitions 0/189 dead transitions. [2024-06-21 21:54:29,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 189 transitions, 2291 flow [2024-06-21 21:54:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 21:54:29,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814102564102564 [2024-06-21 21:54:29,218 INFO L175 Difference]: Start difference. First operand has 152 places, 171 transitions, 1865 flow. Second operand 8 states and 119 transitions. [2024-06-21 21:54:29,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 189 transitions, 2291 flow [2024-06-21 21:54:29,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 189 transitions, 2213 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:29,360 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1850 flow [2024-06-21 21:54:29,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1850, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2024-06-21 21:54:29,361 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 116 predicate places. [2024-06-21 21:54:29,361 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1850 flow [2024-06-21 21:54:29,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:29,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:29,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:29,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:54:29,362 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 21:54:29,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash 375172395, now seen corresponding path program 1 times [2024-06-21 21:54:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:29,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006507743] [2024-06-21 21:54:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:29,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:29,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006507743] [2024-06-21 21:54:29,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006507743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:29,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:29,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:29,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241413734] [2024-06-21 21:54:29,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:29,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:29,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:29,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:30,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:30,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1850 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:30,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:30,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:30,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:30,492 INFO L124 PetriNetUnfolderBase]: 2037/3124 cut-off events. [2024-06-21 21:54:30,492 INFO L125 PetriNetUnfolderBase]: For 99752/99752 co-relation queries the response was YES. [2024-06-21 21:54:30,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 3124 events. 2037/3124 cut-off events. For 99752/99752 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15457 event pairs, 573 based on Foata normal form. 2/3124 useless extension candidates. Maximal degree in co-relation 19550. Up to 3097 conditions per place. [2024-06-21 21:54:30,518 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 166 selfloop transitions, 14 changer transitions 0/183 dead transitions. [2024-06-21 21:54:30,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 183 transitions, 2266 flow [2024-06-21 21:54:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-21 21:54:30,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2024-06-21 21:54:30,519 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1850 flow. Second operand 6 states and 88 transitions. [2024-06-21 21:54:30,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 183 transitions, 2266 flow [2024-06-21 21:54:30,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 183 transitions, 2186 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:54:30,693 INFO L231 Difference]: Finished difference. Result has 155 places, 173 transitions, 1839 flow [2024-06-21 21:54:30,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1839, PETRI_PLACES=155, PETRI_TRANSITIONS=173} [2024-06-21 21:54:30,694 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 115 predicate places. [2024-06-21 21:54:30,694 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 173 transitions, 1839 flow [2024-06-21 21:54:30,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:30,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:30,694 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 21:54:30,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:54:30,695 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 21:54:30,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -878432223, now seen corresponding path program 1 times [2024-06-21 21:54:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:30,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778343297] [2024-06-21 21:54:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:31,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:31,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778343297] [2024-06-21 21:54:31,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778343297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:31,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:31,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511814693] [2024-06-21 21:54:31,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:31,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:31,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:31,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 173 transitions, 1839 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:31,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:31,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:31,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:31,979 INFO L124 PetriNetUnfolderBase]: 2079/3184 cut-off events. [2024-06-21 21:54:31,980 INFO L125 PetriNetUnfolderBase]: For 106688/106690 co-relation queries the response was YES. [2024-06-21 21:54:31,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20178 conditions, 3184 events. 2079/3184 cut-off events. For 106688/106690 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15916 event pairs, 500 based on Foata normal form. 5/3187 useless extension candidates. Maximal degree in co-relation 20102. Up to 2824 conditions per place. [2024-06-21 21:54:32,005 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 153 selfloop transitions, 66 changer transitions 0/222 dead transitions. [2024-06-21 21:54:32,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 222 transitions, 2724 flow [2024-06-21 21:54:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:54:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:54:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:54:32,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:54:32,007 INFO L175 Difference]: Start difference. First operand has 155 places, 173 transitions, 1839 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:54:32,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 222 transitions, 2724 flow [2024-06-21 21:54:32,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 222 transitions, 2671 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:32,205 INFO L231 Difference]: Finished difference. Result has 161 places, 184 transitions, 2077 flow [2024-06-21 21:54:32,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2077, PETRI_PLACES=161, PETRI_TRANSITIONS=184} [2024-06-21 21:54:32,205 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-21 21:54:32,205 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 184 transitions, 2077 flow [2024-06-21 21:54:32,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:32,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:32,206 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 21:54:32,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:54:32,206 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 21:54:32,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash -878192903, now seen corresponding path program 1 times [2024-06-21 21:54:32,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082318156] [2024-06-21 21:54:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:32,809 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 21:54:32,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:32,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082318156] [2024-06-21 21:54:32,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082318156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:32,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:32,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473046515] [2024-06-21 21:54:32,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:32,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:32,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:32,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:32,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 184 transitions, 2077 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:32,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:32,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:32,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:33,415 INFO L124 PetriNetUnfolderBase]: 2283/3467 cut-off events. [2024-06-21 21:54:33,416 INFO L125 PetriNetUnfolderBase]: For 131297/131299 co-relation queries the response was YES. [2024-06-21 21:54:33,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23261 conditions, 3467 events. 2283/3467 cut-off events. For 131297/131299 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17335 event pairs, 511 based on Foata normal form. 12/3477 useless extension candidates. Maximal degree in co-relation 23183. Up to 2468 conditions per place. [2024-06-21 21:54:33,446 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 143 selfloop transitions, 97 changer transitions 0/243 dead transitions. [2024-06-21 21:54:33,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 243 transitions, 3199 flow [2024-06-21 21:54:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:54:33,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 21:54:33,450 INFO L175 Difference]: Start difference. First operand has 161 places, 184 transitions, 2077 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:54:33,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 243 transitions, 3199 flow [2024-06-21 21:54:33,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 243 transitions, 3068 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:33,673 INFO L231 Difference]: Finished difference. Result has 166 places, 202 transitions, 2475 flow [2024-06-21 21:54:33,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2475, PETRI_PLACES=166, PETRI_TRANSITIONS=202} [2024-06-21 21:54:33,674 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-21 21:54:33,674 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 202 transitions, 2475 flow [2024-06-21 21:54:33,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:33,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:33,679 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 21:54:33,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:54:33,679 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 21:54:33,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash -874618975, now seen corresponding path program 1 times [2024-06-21 21:54:33,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:33,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531555663] [2024-06-21 21:54:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:33,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:34,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531555663] [2024-06-21 21:54:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531555663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:34,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:34,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797722036] [2024-06-21 21:54:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:34,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:34,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:34,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 202 transitions, 2475 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:34,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:34,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:34,729 INFO L124 PetriNetUnfolderBase]: 2319/3517 cut-off events. [2024-06-21 21:54:34,730 INFO L125 PetriNetUnfolderBase]: For 138112/138114 co-relation queries the response was YES. [2024-06-21 21:54:34,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25251 conditions, 3517 events. 2319/3517 cut-off events. For 138112/138114 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17646 event pairs, 524 based on Foata normal form. 6/3521 useless extension candidates. Maximal degree in co-relation 25169. Up to 3218 conditions per place. [2024-06-21 21:54:34,766 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 172 selfloop transitions, 60 changer transitions 0/235 dead transitions. [2024-06-21 21:54:34,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 235 transitions, 3320 flow [2024-06-21 21:54:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:54:34,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 21:54:34,768 INFO L175 Difference]: Start difference. First operand has 166 places, 202 transitions, 2475 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:54:34,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 235 transitions, 3320 flow [2024-06-21 21:54:35,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 235 transitions, 3198 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 21:54:35,038 INFO L231 Difference]: Finished difference. Result has 172 places, 211 transitions, 2669 flow [2024-06-21 21:54:35,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2669, PETRI_PLACES=172, PETRI_TRANSITIONS=211} [2024-06-21 21:54:35,039 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-21 21:54:35,039 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 211 transitions, 2669 flow [2024-06-21 21:54:35,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:35,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:35,039 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 21:54:35,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:54:35,040 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 21:54:35,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash -87110213, now seen corresponding path program 2 times [2024-06-21 21:54:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:35,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939128321] [2024-06-21 21:54:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:35,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939128321] [2024-06-21 21:54:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939128321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:35,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:35,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:35,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764579026] [2024-06-21 21:54:35,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:35,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:35,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:35,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 211 transitions, 2669 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:35,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:35,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:35,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:36,243 INFO L124 PetriNetUnfolderBase]: 2303/3494 cut-off events. [2024-06-21 21:54:36,243 INFO L125 PetriNetUnfolderBase]: For 140107/140107 co-relation queries the response was YES. [2024-06-21 21:54:36,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24859 conditions, 3494 events. 2303/3494 cut-off events. For 140107/140107 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17449 event pairs, 624 based on Foata normal form. 4/3496 useless extension candidates. Maximal degree in co-relation 24774. Up to 3435 conditions per place. [2024-06-21 21:54:36,275 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 203 selfloop transitions, 24 changer transitions 0/230 dead transitions. [2024-06-21 21:54:36,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 230 transitions, 3177 flow [2024-06-21 21:54:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 21:54:36,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:54:36,276 INFO L175 Difference]: Start difference. First operand has 172 places, 211 transitions, 2669 flow. Second operand 8 states and 120 transitions. [2024-06-21 21:54:36,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 230 transitions, 3177 flow [2024-06-21 21:54:36,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 230 transitions, 3053 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 21:54:36,560 INFO L231 Difference]: Finished difference. Result has 177 places, 211 transitions, 2601 flow [2024-06-21 21:54:36,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2601, PETRI_PLACES=177, PETRI_TRANSITIONS=211} [2024-06-21 21:54:36,561 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-21 21:54:36,561 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 211 transitions, 2601 flow [2024-06-21 21:54:36,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:36,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:36,561 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 21:54:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:54:36,562 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 21:54:36,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:36,562 INFO L85 PathProgramCache]: Analyzing trace with hash -869850803, now seen corresponding path program 2 times [2024-06-21 21:54:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:36,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415170463] [2024-06-21 21:54:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:36,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:37,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:37,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415170463] [2024-06-21 21:54:37,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415170463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:37,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188152913] [2024-06-21 21:54:37,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:37,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:37,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:37,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:37,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 211 transitions, 2601 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:37,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:37,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:37,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:38,003 INFO L124 PetriNetUnfolderBase]: 2653/3977 cut-off events. [2024-06-21 21:54:38,003 INFO L125 PetriNetUnfolderBase]: For 179368/179368 co-relation queries the response was YES. [2024-06-21 21:54:38,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29117 conditions, 3977 events. 2653/3977 cut-off events. For 179368/179368 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20026 event pairs, 657 based on Foata normal form. 6/3981 useless extension candidates. Maximal degree in co-relation 29031. Up to 3563 conditions per place. [2024-06-21 21:54:38,035 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 206 selfloop transitions, 57 changer transitions 0/266 dead transitions. [2024-06-21 21:54:38,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 266 transitions, 3804 flow [2024-06-21 21:54:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:54:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:54:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 21:54:38,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 21:54:38,037 INFO L175 Difference]: Start difference. First operand has 177 places, 211 transitions, 2601 flow. Second operand 10 states and 160 transitions. [2024-06-21 21:54:38,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 266 transitions, 3804 flow [2024-06-21 21:54:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 266 transitions, 3764 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:38,303 INFO L231 Difference]: Finished difference. Result has 183 places, 233 transitions, 3026 flow [2024-06-21 21:54:38,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3026, PETRI_PLACES=183, PETRI_TRANSITIONS=233} [2024-06-21 21:54:38,303 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 143 predicate places. [2024-06-21 21:54:38,303 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 233 transitions, 3026 flow [2024-06-21 21:54:38,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:38,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:38,304 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 21:54:38,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:54:38,304 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 21:54:38,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -869861033, now seen corresponding path program 3 times [2024-06-21 21:54:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:38,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617690838] [2024-06-21 21:54:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:38,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:38,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617690838] [2024-06-21 21:54:38,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617690838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:38,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:38,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:38,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521996381] [2024-06-21 21:54:38,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:38,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:38,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:38,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:38,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:38,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 233 transitions, 3026 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:38,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:38,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:38,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:39,733 INFO L124 PetriNetUnfolderBase]: 2629/3947 cut-off events. [2024-06-21 21:54:39,733 INFO L125 PetriNetUnfolderBase]: For 186802/186802 co-relation queries the response was YES. [2024-06-21 21:54:39,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29590 conditions, 3947 events. 2629/3947 cut-off events. For 186802/186802 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19922 event pairs, 671 based on Foata normal form. 12/3957 useless extension candidates. Maximal degree in co-relation 29501. Up to 3558 conditions per place. [2024-06-21 21:54:39,770 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 205 selfloop transitions, 58 changer transitions 0/266 dead transitions. [2024-06-21 21:54:39,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 266 transitions, 3974 flow [2024-06-21 21:54:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:54:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:54:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:54:39,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2024-06-21 21:54:39,780 INFO L175 Difference]: Start difference. First operand has 183 places, 233 transitions, 3026 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:54:39,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 266 transitions, 3974 flow [2024-06-21 21:54:40,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 266 transitions, 3818 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:40,114 INFO L231 Difference]: Finished difference. Result has 188 places, 237 transitions, 3114 flow [2024-06-21 21:54:40,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3114, PETRI_PLACES=188, PETRI_TRANSITIONS=237} [2024-06-21 21:54:40,115 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 148 predicate places. [2024-06-21 21:54:40,115 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 237 transitions, 3114 flow [2024-06-21 21:54:40,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:40,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:40,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:54:40,116 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 21:54:40,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash -869861343, now seen corresponding path program 2 times [2024-06-21 21:54:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:40,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834149602] [2024-06-21 21:54:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834149602] [2024-06-21 21:54:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834149602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:40,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:40,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:40,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40866543] [2024-06-21 21:54:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:40,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:40,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 237 transitions, 3114 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:40,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:40,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:40,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:41,671 INFO L124 PetriNetUnfolderBase]: 2598/3905 cut-off events. [2024-06-21 21:54:41,672 INFO L125 PetriNetUnfolderBase]: For 183154/183154 co-relation queries the response was YES. [2024-06-21 21:54:41,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29027 conditions, 3905 events. 2598/3905 cut-off events. For 183154/183154 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19688 event pairs, 649 based on Foata normal form. 9/3912 useless extension candidates. Maximal degree in co-relation 28935. Up to 3641 conditions per place. [2024-06-21 21:54:41,711 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 211 selfloop transitions, 56 changer transitions 0/270 dead transitions. [2024-06-21 21:54:41,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 270 transitions, 3978 flow [2024-06-21 21:54:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:54:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:54:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:54:41,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-06-21 21:54:41,713 INFO L175 Difference]: Start difference. First operand has 188 places, 237 transitions, 3114 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:54:41,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 270 transitions, 3978 flow [2024-06-21 21:54:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 270 transitions, 3836 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:42,036 INFO L231 Difference]: Finished difference. Result has 195 places, 242 transitions, 3214 flow [2024-06-21 21:54:42,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3214, PETRI_PLACES=195, PETRI_TRANSITIONS=242} [2024-06-21 21:54:42,037 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 155 predicate places. [2024-06-21 21:54:42,037 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 242 transitions, 3214 flow [2024-06-21 21:54:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:42,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:42,037 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 21:54:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:54:42,037 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 21:54:42,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash 321490849, now seen corresponding path program 3 times [2024-06-21 21:54:42,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:42,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613432785] [2024-06-21 21:54:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:42,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:42,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:42,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613432785] [2024-06-21 21:54:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613432785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:42,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741785497] [2024-06-21 21:54:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:42,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:42,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 242 transitions, 3214 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:42,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:42,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:42,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:43,280 INFO L124 PetriNetUnfolderBase]: 2608/3919 cut-off events. [2024-06-21 21:54:43,281 INFO L125 PetriNetUnfolderBase]: For 184915/184915 co-relation queries the response was YES. [2024-06-21 21:54:43,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29517 conditions, 3919 events. 2608/3919 cut-off events. For 184915/184915 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19697 event pairs, 713 based on Foata normal form. 2/3919 useless extension candidates. Maximal degree in co-relation 29421. Up to 3845 conditions per place. [2024-06-21 21:54:43,321 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 233 selfloop transitions, 29 changer transitions 0/265 dead transitions. [2024-06-21 21:54:43,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 265 transitions, 3969 flow [2024-06-21 21:54:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 21:54:43,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:54:43,323 INFO L175 Difference]: Start difference. First operand has 195 places, 242 transitions, 3214 flow. Second operand 8 states and 117 transitions. [2024-06-21 21:54:43,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 265 transitions, 3969 flow [2024-06-21 21:54:43,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 265 transitions, 3856 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:43,637 INFO L231 Difference]: Finished difference. Result has 198 places, 247 transitions, 3265 flow [2024-06-21 21:54:43,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=198, PETRI_TRANSITIONS=247} [2024-06-21 21:54:43,638 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 158 predicate places. [2024-06-21 21:54:43,638 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 247 transitions, 3265 flow [2024-06-21 21:54:43,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:43,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:43,639 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 21:54:43,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:54:43,639 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 21:54:43,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash 122547127, now seen corresponding path program 4 times [2024-06-21 21:54:43,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:43,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620581231] [2024-06-21 21:54:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:43,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:44,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620581231] [2024-06-21 21:54:44,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620581231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:44,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:44,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:44,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855166326] [2024-06-21 21:54:44,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:44,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:44,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:44,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 247 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:44,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:44,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:44,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:44,829 INFO L124 PetriNetUnfolderBase]: 2602/3911 cut-off events. [2024-06-21 21:54:44,829 INFO L125 PetriNetUnfolderBase]: For 191483/191483 co-relation queries the response was YES. [2024-06-21 21:54:44,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29357 conditions, 3911 events. 2602/3911 cut-off events. For 191483/191483 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19677 event pairs, 702 based on Foata normal form. 2/3911 useless extension candidates. Maximal degree in co-relation 29259. Up to 3875 conditions per place. [2024-06-21 21:54:44,868 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 237 selfloop transitions, 20 changer transitions 0/260 dead transitions. [2024-06-21 21:54:44,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 260 transitions, 3815 flow [2024-06-21 21:54:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-21 21:54:44,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772893772893773 [2024-06-21 21:54:44,869 INFO L175 Difference]: Start difference. First operand has 198 places, 247 transitions, 3265 flow. Second operand 7 states and 103 transitions. [2024-06-21 21:54:44,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 260 transitions, 3815 flow [2024-06-21 21:54:45,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 260 transitions, 3622 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 21:54:45,215 INFO L231 Difference]: Finished difference. Result has 198 places, 247 transitions, 3118 flow [2024-06-21 21:54:45,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3118, PETRI_PLACES=198, PETRI_TRANSITIONS=247} [2024-06-21 21:54:45,216 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 158 predicate places. [2024-06-21 21:54:45,216 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 247 transitions, 3118 flow [2024-06-21 21:54:45,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:45,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:45,216 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 21:54:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:54:45,217 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 21:54:45,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash -435789305, now seen corresponding path program 5 times [2024-06-21 21:54:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:45,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613766734] [2024-06-21 21:54:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:45,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613766734] [2024-06-21 21:54:45,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613766734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:45,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:45,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:45,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740979148] [2024-06-21 21:54:45,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:45,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:45,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:45,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:45,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:45,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 247 transitions, 3118 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:45,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:45,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:45,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:46,494 INFO L124 PetriNetUnfolderBase]: 2590/3895 cut-off events. [2024-06-21 21:54:46,494 INFO L125 PetriNetUnfolderBase]: For 195558/195558 co-relation queries the response was YES. [2024-06-21 21:54:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28975 conditions, 3895 events. 2590/3895 cut-off events. For 195558/195558 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19684 event pairs, 595 based on Foata normal form. 4/3897 useless extension candidates. Maximal degree in co-relation 28878. Up to 3709 conditions per place. [2024-06-21 21:54:46,528 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 230 selfloop transitions, 38 changer transitions 0/271 dead transitions. [2024-06-21 21:54:46,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 271 transitions, 3812 flow [2024-06-21 21:54:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:54:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:54:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:54:46,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 21:54:46,529 INFO L175 Difference]: Start difference. First operand has 198 places, 247 transitions, 3118 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:54:46,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 271 transitions, 3812 flow [2024-06-21 21:54:46,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 271 transitions, 3726 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:46,957 INFO L231 Difference]: Finished difference. Result has 199 places, 247 transitions, 3122 flow [2024-06-21 21:54:46,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3122, PETRI_PLACES=199, PETRI_TRANSITIONS=247} [2024-06-21 21:54:46,960 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 159 predicate places. [2024-06-21 21:54:46,961 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 247 transitions, 3122 flow [2024-06-21 21:54:46,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:46,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:46,961 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 21:54:46,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:54:46,961 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 21:54:46,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1261244285, now seen corresponding path program 6 times [2024-06-21 21:54:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:46,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064645819] [2024-06-21 21:54:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:46,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064645819] [2024-06-21 21:54:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064645819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:47,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:54:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678718919] [2024-06-21 21:54:47,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:54:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:54:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:54:47,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:47,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 247 transitions, 3122 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:47,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:47,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:47,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:48,117 INFO L124 PetriNetUnfolderBase]: 2580/3881 cut-off events. [2024-06-21 21:54:48,118 INFO L125 PetriNetUnfolderBase]: For 200175/200175 co-relation queries the response was YES. [2024-06-21 21:54:48,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29059 conditions, 3881 events. 2580/3881 cut-off events. For 200175/200175 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19550 event pairs, 694 based on Foata normal form. 2/3881 useless extension candidates. Maximal degree in co-relation 28962. Up to 3830 conditions per place. [2024-06-21 21:54:48,158 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 239 selfloop transitions, 20 changer transitions 0/262 dead transitions. [2024-06-21 21:54:48,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 262 transitions, 3682 flow [2024-06-21 21:54:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:54:48,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 21:54:48,159 INFO L175 Difference]: Start difference. First operand has 199 places, 247 transitions, 3122 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:54:48,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 262 transitions, 3682 flow [2024-06-21 21:54:48,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 262 transitions, 3599 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:48,431 INFO L231 Difference]: Finished difference. Result has 200 places, 247 transitions, 3089 flow [2024-06-21 21:54:48,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3089, PETRI_PLACES=200, PETRI_TRANSITIONS=247} [2024-06-21 21:54:48,432 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-21 21:54:48,432 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 247 transitions, 3089 flow [2024-06-21 21:54:48,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:48,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:48,432 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 21:54:48,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:54:48,432 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 21:54:48,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:48,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1254987183, now seen corresponding path program 4 times [2024-06-21 21:54:48,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:48,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766322730] [2024-06-21 21:54:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:48,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:48,982 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 21:54:48,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:48,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766322730] [2024-06-21 21:54:48,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766322730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:48,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:48,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:54:48,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920658231] [2024-06-21 21:54:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:48,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:54:48,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:54:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:54:49,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:49,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 247 transitions, 3089 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:49,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:49,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:49,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:49,775 INFO L124 PetriNetUnfolderBase]: 2687/4030 cut-off events. [2024-06-21 21:54:49,775 INFO L125 PetriNetUnfolderBase]: For 213433/213433 co-relation queries the response was YES. [2024-06-21 21:54:49,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30318 conditions, 4030 events. 2687/4030 cut-off events. For 213433/213433 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20350 event pairs, 703 based on Foata normal form. 6/4034 useless extension candidates. Maximal degree in co-relation 30221. Up to 3872 conditions per place. [2024-06-21 21:54:49,818 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 234 selfloop transitions, 42 changer transitions 0/279 dead transitions. [2024-06-21 21:54:49,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 3971 flow [2024-06-21 21:54:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:54:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:54:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-21 21:54:49,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.351981351981352 [2024-06-21 21:54:49,819 INFO L175 Difference]: Start difference. First operand has 200 places, 247 transitions, 3089 flow. Second operand 11 states and 151 transitions. [2024-06-21 21:54:49,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 3971 flow [2024-06-21 21:54:50,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 279 transitions, 3879 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:54:50,132 INFO L231 Difference]: Finished difference. Result has 206 places, 260 transitions, 3305 flow [2024-06-21 21:54:50,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2997, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3305, PETRI_PLACES=206, PETRI_TRANSITIONS=260} [2024-06-21 21:54:50,133 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 166 predicate places. [2024-06-21 21:54:50,133 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 260 transitions, 3305 flow [2024-06-21 21:54:50,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:50,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:50,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:50,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:54:50,133 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 21:54:50,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1315023771, now seen corresponding path program 5 times [2024-06-21 21:54:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:50,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855393809] [2024-06-21 21:54:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:50,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:50,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:50,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855393809] [2024-06-21 21:54:50,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855393809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:50,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:50,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:50,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146399064] [2024-06-21 21:54:50,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:50,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:50,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:50,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 260 transitions, 3305 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:50,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:50,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:50,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:51,608 INFO L124 PetriNetUnfolderBase]: 3093/4590 cut-off events. [2024-06-21 21:54:51,609 INFO L125 PetriNetUnfolderBase]: For 277460/277460 co-relation queries the response was YES. [2024-06-21 21:54:51,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37565 conditions, 4590 events. 3093/4590 cut-off events. For 277460/277460 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23437 event pairs, 646 based on Foata normal form. 6/4594 useless extension candidates. Maximal degree in co-relation 37465. Up to 3682 conditions per place. [2024-06-21 21:54:51,656 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 222 selfloop transitions, 89 changer transitions 0/314 dead transitions. [2024-06-21 21:54:51,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 314 transitions, 4656 flow [2024-06-21 21:54:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:54:51,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 21:54:51,658 INFO L175 Difference]: Start difference. First operand has 206 places, 260 transitions, 3305 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:54:51,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 314 transitions, 4656 flow [2024-06-21 21:54:52,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 314 transitions, 4500 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-21 21:54:52,339 INFO L231 Difference]: Finished difference. Result has 208 places, 282 transitions, 3800 flow [2024-06-21 21:54:52,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3800, PETRI_PLACES=208, PETRI_TRANSITIONS=282} [2024-06-21 21:54:52,340 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 168 predicate places. [2024-06-21 21:54:52,340 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 282 transitions, 3800 flow [2024-06-21 21:54:52,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:52,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:52,340 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 21:54:52,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:54:52,341 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 21:54:52,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash -435793273, now seen corresponding path program 3 times [2024-06-21 21:54:52,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:52,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425211582] [2024-06-21 21:54:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:52,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425211582] [2024-06-21 21:54:52,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425211582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:52,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:52,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678155424] [2024-06-21 21:54:52,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:52,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:52,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:52,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:52,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 282 transitions, 3800 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:52,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:52,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:52,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:53,899 INFO L124 PetriNetUnfolderBase]: 3077/4571 cut-off events. [2024-06-21 21:54:53,899 INFO L125 PetriNetUnfolderBase]: For 288077/288077 co-relation queries the response was YES. [2024-06-21 21:54:53,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38312 conditions, 4571 events. 3077/4571 cut-off events. For 288077/288077 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23381 event pairs, 620 based on Foata normal form. 10/4579 useless extension candidates. Maximal degree in co-relation 38212. Up to 3856 conditions per place. [2024-06-21 21:54:53,945 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 231 selfloop transitions, 106 changer transitions 0/340 dead transitions. [2024-06-21 21:54:53,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 340 transitions, 5187 flow [2024-06-21 21:54:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:54:53,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 21:54:53,947 INFO L175 Difference]: Start difference. First operand has 208 places, 282 transitions, 3800 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:54:53,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 340 transitions, 5187 flow [2024-06-21 21:54:54,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 340 transitions, 4983 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-21 21:54:54,521 INFO L231 Difference]: Finished difference. Result has 215 places, 297 transitions, 4296 flow [2024-06-21 21:54:54,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4296, PETRI_PLACES=215, PETRI_TRANSITIONS=297} [2024-06-21 21:54:54,522 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 175 predicate places. [2024-06-21 21:54:54,522 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 297 transitions, 4296 flow [2024-06-21 21:54:54,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:54,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:54,522 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 21:54:54,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:54:54,522 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 21:54:54,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1266961863, now seen corresponding path program 6 times [2024-06-21 21:54:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:54,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816574350] [2024-06-21 21:54:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:55,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:55,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816574350] [2024-06-21 21:54:55,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816574350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:55,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:55,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631691940] [2024-06-21 21:54:55,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:55,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:55,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:55,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:55,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 297 transitions, 4296 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:55,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:55,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:55,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:55,958 INFO L124 PetriNetUnfolderBase]: 3047/4532 cut-off events. [2024-06-21 21:54:55,958 INFO L125 PetriNetUnfolderBase]: For 287580/287580 co-relation queries the response was YES. [2024-06-21 21:54:55,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38318 conditions, 4532 events. 3047/4532 cut-off events. For 287580/287580 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23184 event pairs, 615 based on Foata normal form. 12/4542 useless extension candidates. Maximal degree in co-relation 38214. Up to 3669 conditions per place. [2024-06-21 21:54:56,003 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 217 selfloop transitions, 114 changer transitions 0/334 dead transitions. [2024-06-21 21:54:56,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 334 transitions, 5329 flow [2024-06-21 21:54:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:54:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:54:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:54:56,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-06-21 21:54:56,006 INFO L175 Difference]: Start difference. First operand has 215 places, 297 transitions, 4296 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:54:56,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 334 transitions, 5329 flow [2024-06-21 21:54:56,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 334 transitions, 5188 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 21:54:56,829 INFO L231 Difference]: Finished difference. Result has 220 places, 299 transitions, 4498 flow [2024-06-21 21:54:56,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4498, PETRI_PLACES=220, PETRI_TRANSITIONS=299} [2024-06-21 21:54:56,830 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 180 predicate places. [2024-06-21 21:54:56,830 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 299 transitions, 4498 flow [2024-06-21 21:54:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:56,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:56,831 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 21:54:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:54:56,831 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 21:54:56,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1254571101, now seen corresponding path program 1 times [2024-06-21 21:54:56,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:56,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945286198] [2024-06-21 21:54:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:57,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:57,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945286198] [2024-06-21 21:54:57,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945286198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:57,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:57,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:57,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785309125] [2024-06-21 21:54:57,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:57,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:57,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:57,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 299 transitions, 4498 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:57,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:57,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:57,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:58,356 INFO L124 PetriNetUnfolderBase]: 3044/4528 cut-off events. [2024-06-21 21:54:58,356 INFO L125 PetriNetUnfolderBase]: For 283450/283450 co-relation queries the response was YES. [2024-06-21 21:54:58,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38905 conditions, 4528 events. 3044/4528 cut-off events. For 283450/283450 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23156 event pairs, 807 based on Foata normal form. 1/4527 useless extension candidates. Maximal degree in co-relation 38799. Up to 4498 conditions per place. [2024-06-21 21:54:58,402 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 286 selfloop transitions, 19 changer transitions 0/308 dead transitions. [2024-06-21 21:54:58,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 308 transitions, 5134 flow [2024-06-21 21:54:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:54:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:54:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-21 21:54:58,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2024-06-21 21:54:58,404 INFO L175 Difference]: Start difference. First operand has 220 places, 299 transitions, 4498 flow. Second operand 6 states and 89 transitions. [2024-06-21 21:54:58,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 308 transitions, 5134 flow [2024-06-21 21:54:59,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 308 transitions, 4880 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:59,144 INFO L231 Difference]: Finished difference. Result has 221 places, 299 transitions, 4292 flow [2024-06-21 21:54:59,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4292, PETRI_PLACES=221, PETRI_TRANSITIONS=299} [2024-06-21 21:54:59,144 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 181 predicate places. [2024-06-21 21:54:59,144 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 299 transitions, 4292 flow [2024-06-21 21:54:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:59,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:59,145 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 21:54:59,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:54:59,145 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 21:54:59,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:59,146 INFO L85 PathProgramCache]: Analyzing trace with hash 329117345, now seen corresponding path program 1 times [2024-06-21 21:54:59,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:59,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856979692] [2024-06-21 21:54:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:59,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:59,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856979692] [2024-06-21 21:54:59,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856979692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:59,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:59,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711088872] [2024-06-21 21:54:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:59,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:59,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:54:59,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 299 transitions, 4292 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:54:59,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:59,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:54:59,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:00,896 INFO L124 PetriNetUnfolderBase]: 3052/4540 cut-off events. [2024-06-21 21:55:00,896 INFO L125 PetriNetUnfolderBase]: For 292674/292674 co-relation queries the response was YES. [2024-06-21 21:55:00,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38256 conditions, 4540 events. 3052/4540 cut-off events. For 292674/292674 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23195 event pairs, 768 based on Foata normal form. 2/4540 useless extension candidates. Maximal degree in co-relation 38150. Up to 4456 conditions per place. [2024-06-21 21:55:00,950 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 291 selfloop transitions, 27 changer transitions 0/321 dead transitions. [2024-06-21 21:55:00,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 321 transitions, 5140 flow [2024-06-21 21:55:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 21:55:00,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956043956043956 [2024-06-21 21:55:00,951 INFO L175 Difference]: Start difference. First operand has 221 places, 299 transitions, 4292 flow. Second operand 7 states and 108 transitions. [2024-06-21 21:55:00,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 321 transitions, 5140 flow [2024-06-21 21:55:01,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 321 transitions, 5063 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:01,660 INFO L231 Difference]: Finished difference. Result has 223 places, 303 transitions, 4348 flow [2024-06-21 21:55:01,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4348, PETRI_PLACES=223, PETRI_TRANSITIONS=303} [2024-06-21 21:55:01,660 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 183 predicate places. [2024-06-21 21:55:01,660 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 303 transitions, 4348 flow [2024-06-21 21:55:01,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:55:01,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:01,661 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 21:55:01,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:55:01,668 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 21:55:01,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash 329177795, now seen corresponding path program 2 times [2024-06-21 21:55:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:01,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024588847] [2024-06-21 21:55:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:02,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:02,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024588847] [2024-06-21 21:55:02,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024588847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:02,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:02,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:55:02,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7926995] [2024-06-21 21:55:02,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:02,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:55:02,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:55:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:55:02,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:02,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 303 transitions, 4348 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:55:02,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:02,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:02,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:03,488 INFO L124 PetriNetUnfolderBase]: 3060/4552 cut-off events. [2024-06-21 21:55:03,489 INFO L125 PetriNetUnfolderBase]: For 293523/293523 co-relation queries the response was YES. [2024-06-21 21:55:03,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38417 conditions, 4552 events. 3060/4552 cut-off events. For 293523/293523 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23327 event pairs, 807 based on Foata normal form. 2/4552 useless extension candidates. Maximal degree in co-relation 38310. Up to 4499 conditions per place. [2024-06-21 21:55:03,533 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 290 selfloop transitions, 25 changer transitions 0/318 dead transitions. [2024-06-21 21:55:03,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 318 transitions, 5048 flow [2024-06-21 21:55:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-21 21:55:03,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:55:03,534 INFO L175 Difference]: Start difference. First operand has 223 places, 303 transitions, 4348 flow. Second operand 7 states and 104 transitions. [2024-06-21 21:55:03,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 318 transitions, 5048 flow [2024-06-21 21:55:04,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 318 transitions, 4958 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 21:55:04,204 INFO L231 Difference]: Finished difference. Result has 227 places, 305 transitions, 4355 flow [2024-06-21 21:55:04,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4355, PETRI_PLACES=227, PETRI_TRANSITIONS=305} [2024-06-21 21:55:04,205 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 187 predicate places. [2024-06-21 21:55:04,205 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 305 transitions, 4355 flow [2024-06-21 21:55:04,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:55:04,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:04,205 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 21:55:04,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:55:04,205 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 21:55:04,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:04,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1261236349, now seen corresponding path program 3 times [2024-06-21 21:55:04,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:04,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114416240] [2024-06-21 21:55:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:05,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:05,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114416240] [2024-06-21 21:55:05,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114416240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:05,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:05,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:05,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251846864] [2024-06-21 21:55:05,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:05,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:05,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:05,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:05,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 305 transitions, 4355 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:05,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:05,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:05,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:05,927 INFO L124 PetriNetUnfolderBase]: 3055/4545 cut-off events. [2024-06-21 21:55:05,928 INFO L125 PetriNetUnfolderBase]: For 301630/301630 co-relation queries the response was YES. [2024-06-21 21:55:05,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38418 conditions, 4545 events. 3055/4545 cut-off events. For 301630/301630 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23205 event pairs, 755 based on Foata normal form. 2/4545 useless extension candidates. Maximal degree in co-relation 38309. Up to 4482 conditions per place. [2024-06-21 21:55:05,978 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 295 selfloop transitions, 22 changer transitions 0/320 dead transitions. [2024-06-21 21:55:05,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 320 transitions, 5027 flow [2024-06-21 21:55:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:55:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:55:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:55:05,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 21:55:05,980 INFO L175 Difference]: Start difference. First operand has 227 places, 305 transitions, 4355 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:55:05,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 320 transitions, 5027 flow [2024-06-21 21:55:06,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 320 transitions, 4958 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:06,670 INFO L231 Difference]: Finished difference. Result has 228 places, 305 transitions, 4338 flow [2024-06-21 21:55:06,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4338, PETRI_PLACES=228, PETRI_TRANSITIONS=305} [2024-06-21 21:55:06,670 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 188 predicate places. [2024-06-21 21:55:06,671 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 4338 flow [2024-06-21 21:55:06,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:06,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:06,671 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 21:55:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:55:06,671 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 21:55:06,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -647157373, now seen corresponding path program 1 times [2024-06-21 21:55:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:06,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104519839] [2024-06-21 21:55:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:06,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:07,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:07,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104519839] [2024-06-21 21:55:07,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104519839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:07,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:07,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:07,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183690398] [2024-06-21 21:55:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:07,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:07,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:07,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:07,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 4338 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:07,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:07,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:08,110 INFO L124 PetriNetUnfolderBase]: 3049/4538 cut-off events. [2024-06-21 21:55:08,110 INFO L125 PetriNetUnfolderBase]: For 308762/308764 co-relation queries the response was YES. [2024-06-21 21:55:08,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38441 conditions, 4538 events. 3049/4538 cut-off events. For 308762/308764 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23235 event pairs, 612 based on Foata normal form. 4/4540 useless extension candidates. Maximal degree in co-relation 38331. Up to 4262 conditions per place. [2024-06-21 21:55:08,165 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 262 selfloop transitions, 67 changer transitions 0/332 dead transitions. [2024-06-21 21:55:08,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 332 transitions, 5194 flow [2024-06-21 21:55:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:55:08,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-06-21 21:55:08,166 INFO L175 Difference]: Start difference. First operand has 228 places, 305 transitions, 4338 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:55:08,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 332 transitions, 5194 flow [2024-06-21 21:55:08,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 332 transitions, 5131 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:08,778 INFO L231 Difference]: Finished difference. Result has 231 places, 305 transitions, 4415 flow [2024-06-21 21:55:08,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4415, PETRI_PLACES=231, PETRI_TRANSITIONS=305} [2024-06-21 21:55:08,778 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 191 predicate places. [2024-06-21 21:55:08,778 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 305 transitions, 4415 flow [2024-06-21 21:55:08,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:08,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:08,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:55:08,779 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 21:55:08,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash -654778909, now seen corresponding path program 1 times [2024-06-21 21:55:08,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121933141] [2024-06-21 21:55:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:09,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:09,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121933141] [2024-06-21 21:55:09,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121933141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:09,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:09,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:55:09,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449247875] [2024-06-21 21:55:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:55:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:09,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:55:09,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:55:09,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:09,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 305 transitions, 4415 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:09,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:09,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:09,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:10,581 INFO L124 PetriNetUnfolderBase]: 3475/5192 cut-off events. [2024-06-21 21:55:10,581 INFO L125 PetriNetUnfolderBase]: For 435595/435597 co-relation queries the response was YES. [2024-06-21 21:55:10,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45670 conditions, 5192 events. 3475/5192 cut-off events. For 435595/435597 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27045 event pairs, 599 based on Foata normal form. 12/5202 useless extension candidates. Maximal degree in co-relation 45559. Up to 3042 conditions per place. [2024-06-21 21:55:10,643 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 205 selfloop transitions, 176 changer transitions 0/384 dead transitions. [2024-06-21 21:55:10,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 384 transitions, 6230 flow [2024-06-21 21:55:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:55:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:55:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 21:55:10,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-06-21 21:55:10,664 INFO L175 Difference]: Start difference. First operand has 231 places, 305 transitions, 4415 flow. Second operand 9 states and 177 transitions. [2024-06-21 21:55:10,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 384 transitions, 6230 flow [2024-06-21 21:55:11,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 384 transitions, 6027 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:55:11,590 INFO L231 Difference]: Finished difference. Result has 235 places, 324 transitions, 5149 flow [2024-06-21 21:55:11,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5149, PETRI_PLACES=235, PETRI_TRANSITIONS=324} [2024-06-21 21:55:11,591 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 195 predicate places. [2024-06-21 21:55:11,591 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 324 transitions, 5149 flow [2024-06-21 21:55:11,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:11,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:11,592 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 21:55:11,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:55:11,592 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 21:55:11,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash -654569659, now seen corresponding path program 2 times [2024-06-21 21:55:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:11,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799234693] [2024-06-21 21:55:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:12,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:12,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799234693] [2024-06-21 21:55:12,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799234693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:12,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:12,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:55:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420361745] [2024-06-21 21:55:12,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:12,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:55:12,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:55:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:55:12,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:12,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 324 transitions, 5149 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:12,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:12,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:12,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:13,377 INFO L124 PetriNetUnfolderBase]: 3539/5288 cut-off events. [2024-06-21 21:55:13,377 INFO L125 PetriNetUnfolderBase]: For 461045/461047 co-relation queries the response was YES. [2024-06-21 21:55:13,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48848 conditions, 5288 events. 3539/5288 cut-off events. For 461045/461047 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27857 event pairs, 678 based on Foata normal form. 13/5299 useless extension candidates. Maximal degree in co-relation 48734. Up to 3963 conditions per place. [2024-06-21 21:55:13,448 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 198 selfloop transitions, 181 changer transitions 0/382 dead transitions. [2024-06-21 21:55:13,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 382 transitions, 6634 flow [2024-06-21 21:55:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:55:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:55:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:55:13,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2024-06-21 21:55:13,450 INFO L175 Difference]: Start difference. First operand has 235 places, 324 transitions, 5149 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:55:13,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 382 transitions, 6634 flow [2024-06-21 21:55:14,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 382 transitions, 6532 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 21:55:14,513 INFO L231 Difference]: Finished difference. Result has 243 places, 333 transitions, 5575 flow [2024-06-21 21:55:14,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5575, PETRI_PLACES=243, PETRI_TRANSITIONS=333} [2024-06-21 21:55:14,514 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 203 predicate places. [2024-06-21 21:55:14,514 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 333 transitions, 5575 flow [2024-06-21 21:55:14,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:14,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:14,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:14,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:55:14,515 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 21:55:14,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:14,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1454175198, now seen corresponding path program 1 times [2024-06-21 21:55:14,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:14,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966248485] [2024-06-21 21:55:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:15,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:15,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966248485] [2024-06-21 21:55:15,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966248485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:15,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:15,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:55:15,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351253117] [2024-06-21 21:55:15,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:15,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:55:15,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:15,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:55:15,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:55:15,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:15,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 333 transitions, 5575 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:55:15,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:15,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:15,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:16,516 INFO L124 PetriNetUnfolderBase]: 3525/5270 cut-off events. [2024-06-21 21:55:16,516 INFO L125 PetriNetUnfolderBase]: For 472229/472231 co-relation queries the response was YES. [2024-06-21 21:55:16,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49667 conditions, 5270 events. 3525/5270 cut-off events. For 472229/472231 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27640 event pairs, 724 based on Foata normal form. 6/5274 useless extension candidates. Maximal degree in co-relation 49550. Up to 4286 conditions per place. [2024-06-21 21:55:16,587 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 232 selfloop transitions, 141 changer transitions 0/376 dead transitions. [2024-06-21 21:55:16,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 376 transitions, 6933 flow [2024-06-21 21:55:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:55:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:55:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 21:55:16,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45014245014245013 [2024-06-21 21:55:16,589 INFO L175 Difference]: Start difference. First operand has 243 places, 333 transitions, 5575 flow. Second operand 9 states and 158 transitions. [2024-06-21 21:55:16,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 376 transitions, 6933 flow [2024-06-21 21:55:17,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 376 transitions, 6621 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:17,659 INFO L231 Difference]: Finished difference. Result has 247 places, 336 transitions, 5616 flow [2024-06-21 21:55:17,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5616, PETRI_PLACES=247, PETRI_TRANSITIONS=336} [2024-06-21 21:55:17,660 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 207 predicate places. [2024-06-21 21:55:17,660 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 336 transitions, 5616 flow [2024-06-21 21:55:17,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:55:17,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:17,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:17,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:55:17,661 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 21:55:17,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash -647160349, now seen corresponding path program 3 times [2024-06-21 21:55:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481271342] [2024-06-21 21:55:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:18,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:18,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481271342] [2024-06-21 21:55:18,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481271342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:18,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:18,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:55:18,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632478060] [2024-06-21 21:55:18,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:18,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:55:18,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:55:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:55:18,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:18,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 336 transitions, 5616 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:18,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:18,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:18,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:19,725 INFO L124 PetriNetUnfolderBase]: 3597/5382 cut-off events. [2024-06-21 21:55:19,726 INFO L125 PetriNetUnfolderBase]: For 512186/512188 co-relation queries the response was YES. [2024-06-21 21:55:19,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50569 conditions, 5382 events. 3597/5382 cut-off events. For 512186/512188 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28393 event pairs, 802 based on Foata normal form. 22/5402 useless extension candidates. Maximal degree in co-relation 50451. Up to 5017 conditions per place. [2024-06-21 21:55:19,795 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 296 selfloop transitions, 74 changer transitions 0/373 dead transitions. [2024-06-21 21:55:19,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 373 transitions, 6704 flow [2024-06-21 21:55:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:55:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:55:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:55:19,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2024-06-21 21:55:19,804 INFO L175 Difference]: Start difference. First operand has 247 places, 336 transitions, 5616 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:55:19,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 373 transitions, 6704 flow [2024-06-21 21:55:20,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 373 transitions, 6327 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:20,747 INFO L231 Difference]: Finished difference. Result has 250 places, 339 transitions, 5473 flow [2024-06-21 21:55:20,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5239, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5473, PETRI_PLACES=250, PETRI_TRANSITIONS=339} [2024-06-21 21:55:20,748 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2024-06-21 21:55:20,748 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 339 transitions, 5473 flow [2024-06-21 21:55:20,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:20,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:20,748 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 21:55:20,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:55:20,748 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 21:55:20,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:20,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1343383461, now seen corresponding path program 2 times [2024-06-21 21:55:20,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:20,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762707498] [2024-06-21 21:55:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:21,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762707498] [2024-06-21 21:55:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762707498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:21,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:21,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:21,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441484958] [2024-06-21 21:55:21,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:21,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:21,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:21,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 339 transitions, 5473 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:21,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:21,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:21,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:22,454 INFO L124 PetriNetUnfolderBase]: 3607/5396 cut-off events. [2024-06-21 21:55:22,455 INFO L125 PetriNetUnfolderBase]: For 494756/494758 co-relation queries the response was YES. [2024-06-21 21:55:22,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50420 conditions, 5396 events. 3607/5396 cut-off events. For 494756/494758 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28431 event pairs, 819 based on Foata normal form. 4/5398 useless extension candidates. Maximal degree in co-relation 50301. Up to 5116 conditions per place. [2024-06-21 21:55:22,525 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 297 selfloop transitions, 66 changer transitions 0/366 dead transitions. [2024-06-21 21:55:22,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 366 transitions, 6464 flow [2024-06-21 21:55:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:55:22,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:55:22,526 INFO L175 Difference]: Start difference. First operand has 250 places, 339 transitions, 5473 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:55:22,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 366 transitions, 6464 flow [2024-06-21 21:55:23,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 366 transitions, 6283 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:23,671 INFO L231 Difference]: Finished difference. Result has 252 places, 342 transitions, 5495 flow [2024-06-21 21:55:23,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5298, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5495, PETRI_PLACES=252, PETRI_TRANSITIONS=342} [2024-06-21 21:55:23,671 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 212 predicate places. [2024-06-21 21:55:23,671 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 342 transitions, 5495 flow [2024-06-21 21:55:23,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:23,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:23,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:23,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:55:23,672 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 21:55:23,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1343383120, now seen corresponding path program 1 times [2024-06-21 21:55:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:23,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332430285] [2024-06-21 21:55:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:23,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:24,251 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 21:55:24,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:24,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332430285] [2024-06-21 21:55:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332430285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:24,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:24,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:55:24,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346524331] [2024-06-21 21:55:24,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:24,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:55:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:55:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:55:24,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:24,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 342 transitions, 5495 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:55:24,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:24,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:24,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:25,467 INFO L124 PetriNetUnfolderBase]: 3803/5668 cut-off events. [2024-06-21 21:55:25,468 INFO L125 PetriNetUnfolderBase]: For 561316/561318 co-relation queries the response was YES. [2024-06-21 21:55:25,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53837 conditions, 5668 events. 3803/5668 cut-off events. For 561316/561318 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29991 event pairs, 794 based on Foata normal form. 12/5678 useless extension candidates. Maximal degree in co-relation 53717. Up to 3825 conditions per place. [2024-06-21 21:55:25,534 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 198 selfloop transitions, 198 changer transitions 0/399 dead transitions. [2024-06-21 21:55:25,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 399 transitions, 7357 flow [2024-06-21 21:55:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:55:25,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 21:55:25,536 INFO L175 Difference]: Start difference. First operand has 252 places, 342 transitions, 5495 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:55:25,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 399 transitions, 7357 flow [2024-06-21 21:55:26,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 399 transitions, 7234 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:26,795 INFO L231 Difference]: Finished difference. Result has 257 places, 364 transitions, 6390 flow [2024-06-21 21:55:26,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5372, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6390, PETRI_PLACES=257, PETRI_TRANSITIONS=364} [2024-06-21 21:55:26,795 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 217 predicate places. [2024-06-21 21:55:26,795 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 364 transitions, 6390 flow [2024-06-21 21:55:26,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:55:26,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:26,796 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 21:55:26,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:55:26,796 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 21:55:26,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1195773520, now seen corresponding path program 2 times [2024-06-21 21:55:26,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:26,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595669493] [2024-06-21 21:55:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:26,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:27,452 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 21:55:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595669493] [2024-06-21 21:55:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595669493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:27,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:27,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:27,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376225870] [2024-06-21 21:55:27,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:27,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:27,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:27,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:27,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:27,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 364 transitions, 6390 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:27,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:27,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:27,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:28,928 INFO L124 PetriNetUnfolderBase]: 4228/6264 cut-off events. [2024-06-21 21:55:28,929 INFO L125 PetriNetUnfolderBase]: For 621670/621670 co-relation queries the response was YES. [2024-06-21 21:55:28,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61308 conditions, 6264 events. 4228/6264 cut-off events. For 621670/621670 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33419 event pairs, 1163 based on Foata normal form. 12/6274 useless extension candidates. Maximal degree in co-relation 61185. Up to 5846 conditions per place. [2024-06-21 21:55:29,019 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 369 selfloop transitions, 71 changer transitions 0/443 dead transitions. [2024-06-21 21:55:29,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 443 transitions, 8429 flow [2024-06-21 21:55:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:55:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:55:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-21 21:55:29,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2024-06-21 21:55:29,021 INFO L175 Difference]: Start difference. First operand has 257 places, 364 transitions, 6390 flow. Second operand 10 states and 154 transitions. [2024-06-21 21:55:29,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 443 transitions, 8429 flow [2024-06-21 21:55:30,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 443 transitions, 7915 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 21:55:30,465 INFO L231 Difference]: Finished difference. Result has 267 places, 411 transitions, 7003 flow [2024-06-21 21:55:30,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7003, PETRI_PLACES=267, PETRI_TRANSITIONS=411} [2024-06-21 21:55:30,466 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 227 predicate places. [2024-06-21 21:55:30,466 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 411 transitions, 7003 flow [2024-06-21 21:55:30,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:30,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:30,467 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 21:55:30,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:55:30,467 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 21:55:30,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1195566130, now seen corresponding path program 3 times [2024-06-21 21:55:30,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:30,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986353124] [2024-06-21 21:55:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:30,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:31,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:31,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986353124] [2024-06-21 21:55:31,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986353124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:31,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:31,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:31,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180639491] [2024-06-21 21:55:31,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:31,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:31,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:31,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 411 transitions, 7003 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:31,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:31,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:31,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:32,546 INFO L124 PetriNetUnfolderBase]: 4176/6192 cut-off events. [2024-06-21 21:55:32,546 INFO L125 PetriNetUnfolderBase]: For 615321/615321 co-relation queries the response was YES. [2024-06-21 21:55:32,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59268 conditions, 6192 events. 4176/6192 cut-off events. For 615321/615321 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 32970 event pairs, 1139 based on Foata normal form. 12/6202 useless extension candidates. Maximal degree in co-relation 59140. Up to 5818 conditions per place. [2024-06-21 21:55:32,619 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 369 selfloop transitions, 72 changer transitions 0/444 dead transitions. [2024-06-21 21:55:32,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 444 transitions, 8228 flow [2024-06-21 21:55:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:55:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:55:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2024-06-21 21:55:32,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:55:32,624 INFO L175 Difference]: Start difference. First operand has 267 places, 411 transitions, 7003 flow. Second operand 11 states and 165 transitions. [2024-06-21 21:55:32,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 444 transitions, 8228 flow [2024-06-21 21:55:34,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 444 transitions, 8165 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 21:55:34,025 INFO L231 Difference]: Finished difference. Result has 277 places, 417 transitions, 7253 flow [2024-06-21 21:55:34,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6940, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7253, PETRI_PLACES=277, PETRI_TRANSITIONS=417} [2024-06-21 21:55:34,026 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 237 predicate places. [2024-06-21 21:55:34,026 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 417 transitions, 7253 flow [2024-06-21 21:55:34,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:34,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:34,026 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 21:55:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:55:34,027 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 21:55:34,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:34,027 INFO L85 PathProgramCache]: Analyzing trace with hash -388872379, now seen corresponding path program 4 times [2024-06-21 21:55:34,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:34,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692732038] [2024-06-21 21:55:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:34,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:34,836 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 21:55:34,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:34,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692732038] [2024-06-21 21:55:34,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692732038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:34,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:34,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:55:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137629667] [2024-06-21 21:55:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:34,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:55:34,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:55:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:55:34,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:34,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 417 transitions, 7253 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:34,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:34,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:34,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:36,396 INFO L124 PetriNetUnfolderBase]: 4248/6304 cut-off events. [2024-06-21 21:55:36,396 INFO L125 PetriNetUnfolderBase]: For 655712/655712 co-relation queries the response was YES. [2024-06-21 21:55:36,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60971 conditions, 6304 events. 4248/6304 cut-off events. For 655712/655712 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33783 event pairs, 1146 based on Foata normal form. 20/6322 useless extension candidates. Maximal degree in co-relation 60838. Up to 6102 conditions per place. [2024-06-21 21:55:36,474 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 396 selfloop transitions, 48 changer transitions 0/447 dead transitions. [2024-06-21 21:55:36,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 447 transitions, 8357 flow [2024-06-21 21:55:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:55:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:55:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-21 21:55:36,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382051282051282 [2024-06-21 21:55:36,475 INFO L175 Difference]: Start difference. First operand has 277 places, 417 transitions, 7253 flow. Second operand 10 states and 149 transitions. [2024-06-21 21:55:36,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 447 transitions, 8357 flow [2024-06-21 21:55:37,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 447 transitions, 8260 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:37,611 INFO L231 Difference]: Finished difference. Result has 282 places, 420 transitions, 7349 flow [2024-06-21 21:55:37,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7156, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7349, PETRI_PLACES=282, PETRI_TRANSITIONS=420} [2024-06-21 21:55:37,612 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 242 predicate places. [2024-06-21 21:55:37,612 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 420 transitions, 7349 flow [2024-06-21 21:55:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:55:37,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:37,613 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 21:55:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:55:37,613 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 21:55:37,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:37,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1195558194, now seen corresponding path program 1 times [2024-06-21 21:55:37,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:37,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083054559] [2024-06-21 21:55:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083054559] [2024-06-21 21:55:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083054559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:38,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:38,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:55:38,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719642168] [2024-06-21 21:55:38,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:38,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:55:38,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:55:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:55:38,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:38,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 420 transitions, 7349 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:55:38,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:38,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:38,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:39,828 INFO L124 PetriNetUnfolderBase]: 4256/6316 cut-off events. [2024-06-21 21:55:39,828 INFO L125 PetriNetUnfolderBase]: For 637165/637165 co-relation queries the response was YES. [2024-06-21 21:55:39,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61385 conditions, 6316 events. 4256/6316 cut-off events. For 637165/637165 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33847 event pairs, 1102 based on Foata normal form. 2/6316 useless extension candidates. Maximal degree in co-relation 61251. Up to 6229 conditions per place. [2024-06-21 21:55:39,904 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 395 selfloop transitions, 43 changer transitions 0/441 dead transitions. [2024-06-21 21:55:39,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 441 transitions, 8321 flow [2024-06-21 21:55:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 21:55:39,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38782051282051283 [2024-06-21 21:55:39,906 INFO L175 Difference]: Start difference. First operand has 282 places, 420 transitions, 7349 flow. Second operand 8 states and 121 transitions. [2024-06-21 21:55:39,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 441 transitions, 8321 flow [2024-06-21 21:55:41,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 441 transitions, 8209 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:41,334 INFO L231 Difference]: Finished difference. Result has 284 places, 422 transitions, 7373 flow [2024-06-21 21:55:41,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7373, PETRI_PLACES=284, PETRI_TRANSITIONS=422} [2024-06-21 21:55:41,335 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 244 predicate places. [2024-06-21 21:55:41,335 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 422 transitions, 7373 flow [2024-06-21 21:55:41,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:55:41,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:41,335 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 21:55:41,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:55:41,336 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 21:55:41,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -370719558, now seen corresponding path program 4 times [2024-06-21 21:55:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235115230] [2024-06-21 21:55:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:41,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:41,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235115230] [2024-06-21 21:55:41,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235115230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:41,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:41,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:41,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650979144] [2024-06-21 21:55:41,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:41,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:41,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:41,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:41,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 422 transitions, 7373 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:41,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:41,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:41,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:43,356 INFO L124 PetriNetUnfolderBase]: 4288/6361 cut-off events. [2024-06-21 21:55:43,357 INFO L125 PetriNetUnfolderBase]: For 664498/664498 co-relation queries the response was YES. [2024-06-21 21:55:43,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62010 conditions, 6361 events. 4288/6361 cut-off events. For 664498/664498 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34180 event pairs, 1195 based on Foata normal form. 4/6363 useless extension candidates. Maximal degree in co-relation 61875. Up to 6064 conditions per place. [2024-06-21 21:55:43,432 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 388 selfloop transitions, 64 changer transitions 0/455 dead transitions. [2024-06-21 21:55:43,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 455 transitions, 8839 flow [2024-06-21 21:55:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:55:43,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:55:43,433 INFO L175 Difference]: Start difference. First operand has 284 places, 422 transitions, 7373 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:55:43,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 455 transitions, 8839 flow [2024-06-21 21:55:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 455 transitions, 8721 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:44,794 INFO L231 Difference]: Finished difference. Result has 287 places, 428 transitions, 7562 flow [2024-06-21 21:55:44,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7562, PETRI_PLACES=287, PETRI_TRANSITIONS=428} [2024-06-21 21:55:44,795 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 247 predicate places. [2024-06-21 21:55:44,795 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 428 transitions, 7562 flow [2024-06-21 21:55:44,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:44,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:44,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:44,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:55:44,796 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 21:55:44,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1376282715, now seen corresponding path program 3 times [2024-06-21 21:55:44,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:44,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663262500] [2024-06-21 21:55:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:44,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:45,376 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 21:55:45,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:45,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663262500] [2024-06-21 21:55:45,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663262500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:45,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:45,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:55:45,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733444841] [2024-06-21 21:55:45,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:45,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:55:45,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:55:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:55:45,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:45,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 428 transitions, 7562 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:55:45,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:45,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:45,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:47,019 INFO L124 PetriNetUnfolderBase]: 4298/6375 cut-off events. [2024-06-21 21:55:47,019 INFO L125 PetriNetUnfolderBase]: For 678559/678559 co-relation queries the response was YES. [2024-06-21 21:55:47,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62620 conditions, 6375 events. 4298/6375 cut-off events. For 678559/678559 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34226 event pairs, 1223 based on Foata normal form. 2/6375 useless extension candidates. Maximal degree in co-relation 62483. Up to 6297 conditions per place. [2024-06-21 21:55:47,105 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 416 selfloop transitions, 31 changer transitions 0/450 dead transitions. [2024-06-21 21:55:47,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 450 transitions, 8583 flow [2024-06-21 21:55:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 21:55:47,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:55:47,107 INFO L175 Difference]: Start difference. First operand has 287 places, 428 transitions, 7562 flow. Second operand 8 states and 120 transitions. [2024-06-21 21:55:47,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 450 transitions, 8583 flow [2024-06-21 21:55:48,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 450 transitions, 8061 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 21:55:48,758 INFO L231 Difference]: Finished difference. Result has 288 places, 431 transitions, 7177 flow [2024-06-21 21:55:48,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7041, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7177, PETRI_PLACES=288, PETRI_TRANSITIONS=431} [2024-06-21 21:55:48,759 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 248 predicate places. [2024-06-21 21:55:48,759 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 431 transitions, 7177 flow [2024-06-21 21:55:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:55:48,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:48,760 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 21:55:48,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:55:48,760 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 21:55:48,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash -364553813, now seen corresponding path program 1 times [2024-06-21 21:55:48,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:48,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007813888] [2024-06-21 21:55:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:48,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:49,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:49,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007813888] [2024-06-21 21:55:49,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007813888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:49,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:49,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151985047] [2024-06-21 21:55:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:49,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:49,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 431 transitions, 7177 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:49,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:49,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:49,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:50,889 INFO L124 PetriNetUnfolderBase]: 4291/6365 cut-off events. [2024-06-21 21:55:50,889 INFO L125 PetriNetUnfolderBase]: For 684915/684915 co-relation queries the response was YES. [2024-06-21 21:55:50,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61307 conditions, 6365 events. 4291/6365 cut-off events. For 684915/684915 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34204 event pairs, 1219 based on Foata normal form. 1/6364 useless extension candidates. Maximal degree in co-relation 61171. Up to 6258 conditions per place. [2024-06-21 21:55:50,991 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 407 selfloop transitions, 45 changer transitions 0/455 dead transitions. [2024-06-21 21:55:50,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 455 transitions, 8433 flow [2024-06-21 21:55:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:55:50,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-21 21:55:50,993 INFO L175 Difference]: Start difference. First operand has 288 places, 431 transitions, 7177 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:55:50,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 455 transitions, 8433 flow [2024-06-21 21:55:52,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 455 transitions, 8321 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:52,428 INFO L231 Difference]: Finished difference. Result has 290 places, 437 transitions, 7365 flow [2024-06-21 21:55:52,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7065, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7365, PETRI_PLACES=290, PETRI_TRANSITIONS=437} [2024-06-21 21:55:52,429 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 250 predicate places. [2024-06-21 21:55:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 437 transitions, 7365 flow [2024-06-21 21:55:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:52,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:52,429 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 21:55:52,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:55:52,429 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 21:55:52,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash -582459845, now seen corresponding path program 2 times [2024-06-21 21:55:52,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:52,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818886679] [2024-06-21 21:55:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:52,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:53,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818886679] [2024-06-21 21:55:53,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818886679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:53,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:53,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:53,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063624803] [2024-06-21 21:55:53,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:53,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:53,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:53,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:53,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 437 transitions, 7365 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:53,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:53,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:53,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:54,418 INFO L124 PetriNetUnfolderBase]: 4288/6361 cut-off events. [2024-06-21 21:55:54,419 INFO L125 PetriNetUnfolderBase]: For 701039/701039 co-relation queries the response was YES. [2024-06-21 21:55:54,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61613 conditions, 6361 events. 4288/6361 cut-off events. For 701039/701039 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34110 event pairs, 1238 based on Foata normal form. 1/6360 useless extension candidates. Maximal degree in co-relation 61475. Up to 6303 conditions per place. [2024-06-21 21:55:54,508 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 418 selfloop transitions, 29 changer transitions 0/450 dead transitions. [2024-06-21 21:55:54,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 450 transitions, 8297 flow [2024-06-21 21:55:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-21 21:55:54,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:55:54,509 INFO L175 Difference]: Start difference. First operand has 290 places, 437 transitions, 7365 flow. Second operand 7 states and 105 transitions. [2024-06-21 21:55:54,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 450 transitions, 8297 flow [2024-06-21 21:55:56,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 450 transitions, 8193 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:56,354 INFO L231 Difference]: Finished difference. Result has 291 places, 437 transitions, 7329 flow [2024-06-21 21:55:56,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7261, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7329, PETRI_PLACES=291, PETRI_TRANSITIONS=437} [2024-06-21 21:55:56,355 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 251 predicate places. [2024-06-21 21:55:56,355 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 437 transitions, 7329 flow [2024-06-21 21:55:56,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:56,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:56,356 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 21:55:56,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:55:56,356 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 21:55:56,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash -496005030, now seen corresponding path program 5 times [2024-06-21 21:55:56,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:56,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522914470] [2024-06-21 21:55:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:56,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:56,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:56,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522914470] [2024-06-21 21:55:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522914470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:56,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:56,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584595905] [2024-06-21 21:55:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:56,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:56,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:55:56,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 437 transitions, 7329 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:56,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:56,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:55:56,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:58,250 INFO L124 PetriNetUnfolderBase]: 4308/6389 cut-off events. [2024-06-21 21:55:58,250 INFO L125 PetriNetUnfolderBase]: For 708248/708248 co-relation queries the response was YES. [2024-06-21 21:55:58,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61807 conditions, 6389 events. 4308/6389 cut-off events. For 708248/708248 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34262 event pairs, 1236 based on Foata normal form. 4/6391 useless extension candidates. Maximal degree in co-relation 61669. Up to 6228 conditions per place. [2024-06-21 21:55:58,340 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 412 selfloop transitions, 47 changer transitions 0/462 dead transitions. [2024-06-21 21:55:58,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 462 transitions, 8540 flow [2024-06-21 21:55:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:55:58,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2024-06-21 21:55:58,342 INFO L175 Difference]: Start difference. First operand has 291 places, 437 transitions, 7329 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:55:58,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 462 transitions, 8540 flow [2024-06-21 21:55:59,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 462 transitions, 8444 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:55:59,877 INFO L231 Difference]: Finished difference. Result has 293 places, 440 transitions, 7405 flow [2024-06-21 21:55:59,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7405, PETRI_PLACES=293, PETRI_TRANSITIONS=440} [2024-06-21 21:55:59,878 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 253 predicate places. [2024-06-21 21:55:59,878 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 440 transitions, 7405 flow [2024-06-21 21:55:59,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:59,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:59,878 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 21:55:59,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:55:59,879 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 21:55:59,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:59,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1701410126, now seen corresponding path program 6 times [2024-06-21 21:55:59,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:59,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342197514] [2024-06-21 21:55:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:59,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:00,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:00,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342197514] [2024-06-21 21:56:00,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342197514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:00,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:00,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357941653] [2024-06-21 21:56:00,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:00,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:00,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:00,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:00,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:00,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:00,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 440 transitions, 7405 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:00,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:00,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:00,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:01,905 INFO L124 PetriNetUnfolderBase]: 4325/6413 cut-off events. [2024-06-21 21:56:01,906 INFO L125 PetriNetUnfolderBase]: For 707278/707278 co-relation queries the response was YES. [2024-06-21 21:56:01,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62032 conditions, 6413 events. 4325/6413 cut-off events. For 707278/707278 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34448 event pairs, 1238 based on Foata normal form. 4/6415 useless extension candidates. Maximal degree in co-relation 61894. Up to 6288 conditions per place. [2024-06-21 21:56:01,991 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 419 selfloop transitions, 44 changer transitions 0/466 dead transitions. [2024-06-21 21:56:01,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 466 transitions, 8514 flow [2024-06-21 21:56:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:56:01,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-21 21:56:01,993 INFO L175 Difference]: Start difference. First operand has 293 places, 440 transitions, 7405 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:56:01,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 466 transitions, 8514 flow [2024-06-21 21:56:03,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 466 transitions, 8349 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:03,706 INFO L231 Difference]: Finished difference. Result has 297 places, 447 transitions, 7459 flow [2024-06-21 21:56:03,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7459, PETRI_PLACES=297, PETRI_TRANSITIONS=447} [2024-06-21 21:56:03,707 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 257 predicate places. [2024-06-21 21:56:03,707 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 447 transitions, 7459 flow [2024-06-21 21:56:03,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:03,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:03,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:03,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:56:03,708 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 21:56:03,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1701023835, now seen corresponding path program 4 times [2024-06-21 21:56:03,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:03,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079946490] [2024-06-21 21:56:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:03,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:04,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079946490] [2024-06-21 21:56:04,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079946490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:04,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:04,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013007056] [2024-06-21 21:56:04,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:04,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:04,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 447 transitions, 7459 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:04,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:04,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:04,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:05,631 INFO L124 PetriNetUnfolderBase]: 4319/6405 cut-off events. [2024-06-21 21:56:05,631 INFO L125 PetriNetUnfolderBase]: For 719913/719913 co-relation queries the response was YES. [2024-06-21 21:56:05,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62791 conditions, 6405 events. 4319/6405 cut-off events. For 719913/719913 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34320 event pairs, 1226 based on Foata normal form. 2/6405 useless extension candidates. Maximal degree in co-relation 62651. Up to 6359 conditions per place. [2024-06-21 21:56:05,732 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 436 selfloop transitions, 23 changer transitions 0/462 dead transitions. [2024-06-21 21:56:05,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 462 transitions, 8429 flow [2024-06-21 21:56:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-21 21:56:05,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685897435897436 [2024-06-21 21:56:05,734 INFO L175 Difference]: Start difference. First operand has 297 places, 447 transitions, 7459 flow. Second operand 8 states and 115 transitions. [2024-06-21 21:56:05,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 462 transitions, 8429 flow [2024-06-21 21:56:07,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 462 transitions, 8309 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 21:56:07,860 INFO L231 Difference]: Finished difference. Result has 301 places, 447 transitions, 7391 flow [2024-06-21 21:56:07,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7339, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7391, PETRI_PLACES=301, PETRI_TRANSITIONS=447} [2024-06-21 21:56:07,861 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 261 predicate places. [2024-06-21 21:56:07,861 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 447 transitions, 7391 flow [2024-06-21 21:56:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:07,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:07,861 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 21:56:07,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:56:07,862 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 21:56:07,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -443479892, now seen corresponding path program 7 times [2024-06-21 21:56:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:07,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831601678] [2024-06-21 21:56:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:08,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:08,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831601678] [2024-06-21 21:56:08,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831601678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:08,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:08,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:08,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290940096] [2024-06-21 21:56:08,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:08,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:08,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:08,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:08,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:08,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:08,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 447 transitions, 7391 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:08,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:08,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:08,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:09,763 INFO L124 PetriNetUnfolderBase]: 4339/6433 cut-off events. [2024-06-21 21:56:09,763 INFO L125 PetriNetUnfolderBase]: For 743281/743281 co-relation queries the response was YES. [2024-06-21 21:56:09,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63156 conditions, 6433 events. 4339/6433 cut-off events. For 743281/743281 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34504 event pairs, 1237 based on Foata normal form. 4/6435 useless extension candidates. Maximal degree in co-relation 63015. Up to 6335 conditions per place. [2024-06-21 21:56:09,858 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 429 selfloop transitions, 36 changer transitions 0/468 dead transitions. [2024-06-21 21:56:09,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 468 transitions, 8463 flow [2024-06-21 21:56:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:56:09,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-21 21:56:09,860 INFO L175 Difference]: Start difference. First operand has 301 places, 447 transitions, 7391 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:56:09,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 468 transitions, 8463 flow [2024-06-21 21:56:11,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 468 transitions, 8302 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 21:56:11,986 INFO L231 Difference]: Finished difference. Result has 301 places, 452 transitions, 7400 flow [2024-06-21 21:56:11,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7230, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7400, PETRI_PLACES=301, PETRI_TRANSITIONS=452} [2024-06-21 21:56:11,986 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 261 predicate places. [2024-06-21 21:56:11,987 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 452 transitions, 7400 flow [2024-06-21 21:56:11,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:11,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:11,987 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 21:56:11,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:56:11,987 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 21:56:11,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash -244178102, now seen corresponding path program 8 times [2024-06-21 21:56:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:11,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656427596] [2024-06-21 21:56:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:11,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:12,411 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 21:56:12,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:12,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656427596] [2024-06-21 21:56:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656427596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:12,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:12,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:12,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717288607] [2024-06-21 21:56:12,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:12,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:12,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:12,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:12,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:12,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 452 transitions, 7400 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:12,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:12,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:12,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:13,843 INFO L124 PetriNetUnfolderBase]: 4327/6417 cut-off events. [2024-06-21 21:56:13,844 INFO L125 PetriNetUnfolderBase]: For 753579/753579 co-relation queries the response was YES. [2024-06-21 21:56:13,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62955 conditions, 6417 events. 4327/6417 cut-off events. For 753579/753579 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34421 event pairs, 1226 based on Foata normal form. 4/6419 useless extension candidates. Maximal degree in co-relation 62812. Up to 6321 conditions per place. [2024-06-21 21:56:13,943 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 427 selfloop transitions, 40 changer transitions 0/470 dead transitions. [2024-06-21 21:56:13,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 470 transitions, 8404 flow [2024-06-21 21:56:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:56:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:56:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-21 21:56:13,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3732193732193732 [2024-06-21 21:56:13,944 INFO L175 Difference]: Start difference. First operand has 301 places, 452 transitions, 7400 flow. Second operand 9 states and 131 transitions. [2024-06-21 21:56:13,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 470 transitions, 8404 flow [2024-06-21 21:56:16,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 470 transitions, 8330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:56:16,295 INFO L231 Difference]: Finished difference. Result has 306 places, 452 transitions, 7412 flow [2024-06-21 21:56:16,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7326, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7412, PETRI_PLACES=306, PETRI_TRANSITIONS=452} [2024-06-21 21:56:16,296 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 266 predicate places. [2024-06-21 21:56:16,296 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 452 transitions, 7412 flow [2024-06-21 21:56:16,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:16,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:16,296 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 21:56:16,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:56:16,296 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 21:56:16,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash 410846166, now seen corresponding path program 9 times [2024-06-21 21:56:16,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:16,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978754014] [2024-06-21 21:56:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:16,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:16,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:16,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978754014] [2024-06-21 21:56:16,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978754014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:16,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:16,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:16,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207402604] [2024-06-21 21:56:16,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:16,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:16,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:16,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:16,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 452 transitions, 7412 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:16,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:16,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:16,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:18,226 INFO L124 PetriNetUnfolderBase]: 4319/6407 cut-off events. [2024-06-21 21:56:18,226 INFO L125 PetriNetUnfolderBase]: For 763405/763405 co-relation queries the response was YES. [2024-06-21 21:56:18,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62865 conditions, 6407 events. 4319/6407 cut-off events. For 763405/763405 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34406 event pairs, 1205 based on Foata normal form. 4/6409 useless extension candidates. Maximal degree in co-relation 62721. Up to 6214 conditions per place. [2024-06-21 21:56:18,314 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 418 selfloop transitions, 53 changer transitions 0/474 dead transitions. [2024-06-21 21:56:18,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 474 transitions, 8590 flow [2024-06-21 21:56:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:56:18,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:56:18,315 INFO L175 Difference]: Start difference. First operand has 306 places, 452 transitions, 7412 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:56:18,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 474 transitions, 8590 flow [2024-06-21 21:56:20,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 474 transitions, 8482 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:56:20,214 INFO L231 Difference]: Finished difference. Result has 305 places, 452 transitions, 7417 flow [2024-06-21 21:56:20,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7304, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7417, PETRI_PLACES=305, PETRI_TRANSITIONS=452} [2024-06-21 21:56:20,214 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 265 predicate places. [2024-06-21 21:56:20,214 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 452 transitions, 7417 flow [2024-06-21 21:56:20,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:20,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:20,215 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 21:56:20,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:56:20,215 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 21:56:20,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -620997362, now seen corresponding path program 10 times [2024-06-21 21:56:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:20,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937235622] [2024-06-21 21:56:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:20,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:20,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937235622] [2024-06-21 21:56:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937235622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:20,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:20,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:20,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346922812] [2024-06-21 21:56:20,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:20,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:20,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:20,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:20,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 452 transitions, 7417 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:20,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:20,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:20,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:22,154 INFO L124 PetriNetUnfolderBase]: 4387/6503 cut-off events. [2024-06-21 21:56:22,155 INFO L125 PetriNetUnfolderBase]: For 804480/804480 co-relation queries the response was YES. [2024-06-21 21:56:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63972 conditions, 6503 events. 4387/6503 cut-off events. For 804480/804480 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34982 event pairs, 909 based on Foata normal form. 12/6513 useless extension candidates. Maximal degree in co-relation 63828. Up to 5493 conditions per place. [2024-06-21 21:56:22,393 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 362 selfloop transitions, 126 changer transitions 0/491 dead transitions. [2024-06-21 21:56:22,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 491 transitions, 8944 flow [2024-06-21 21:56:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:56:22,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 21:56:22,395 INFO L175 Difference]: Start difference. First operand has 305 places, 452 transitions, 7417 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:56:22,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 491 transitions, 8944 flow [2024-06-21 21:56:24,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 491 transitions, 8813 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:24,317 INFO L231 Difference]: Finished difference. Result has 308 places, 459 transitions, 7680 flow [2024-06-21 21:56:24,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7680, PETRI_PLACES=308, PETRI_TRANSITIONS=459} [2024-06-21 21:56:24,318 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 268 predicate places. [2024-06-21 21:56:24,318 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 459 transitions, 7680 flow [2024-06-21 21:56:24,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:24,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:24,319 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 21:56:24,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:56:24,319 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 21:56:24,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash 411083161, now seen corresponding path program 3 times [2024-06-21 21:56:24,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:24,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699355433] [2024-06-21 21:56:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:24,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:25,003 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 21:56:25,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:25,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699355433] [2024-06-21 21:56:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699355433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:25,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:25,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:25,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319173342] [2024-06-21 21:56:25,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:25,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:25,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:25,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 459 transitions, 7680 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:25,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:25,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:25,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:26,488 INFO L124 PetriNetUnfolderBase]: 4380/6493 cut-off events. [2024-06-21 21:56:26,488 INFO L125 PetriNetUnfolderBase]: For 796058/796058 co-relation queries the response was YES. [2024-06-21 21:56:26,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64565 conditions, 6493 events. 4380/6493 cut-off events. For 796058/796058 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34935 event pairs, 1226 based on Foata normal form. 1/6492 useless extension candidates. Maximal degree in co-relation 64420. Up to 6416 conditions per place. [2024-06-21 21:56:26,587 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 441 selfloop transitions, 30 changer transitions 0/474 dead transitions. [2024-06-21 21:56:26,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 474 transitions, 8668 flow [2024-06-21 21:56:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:56:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:56:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 21:56:26,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41452991452991456 [2024-06-21 21:56:26,589 INFO L175 Difference]: Start difference. First operand has 308 places, 459 transitions, 7680 flow. Second operand 6 states and 97 transitions. [2024-06-21 21:56:26,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 474 transitions, 8668 flow [2024-06-21 21:56:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 474 transitions, 8273 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:56:29,022 INFO L231 Difference]: Finished difference. Result has 307 places, 459 transitions, 7363 flow [2024-06-21 21:56:29,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7285, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7363, PETRI_PLACES=307, PETRI_TRANSITIONS=459} [2024-06-21 21:56:29,022 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 267 predicate places. [2024-06-21 21:56:29,022 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 459 transitions, 7363 flow [2024-06-21 21:56:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:56:29,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:29,023 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 21:56:29,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:56:29,023 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 21:56:29,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash -620789972, now seen corresponding path program 11 times [2024-06-21 21:56:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:29,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515018399] [2024-06-21 21:56:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:29,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:29,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515018399] [2024-06-21 21:56:29,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515018399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:29,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:29,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:29,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065233665] [2024-06-21 21:56:29,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:29,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:29,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:29,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 459 transitions, 7363 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:29,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:29,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:29,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:31,090 INFO L124 PetriNetUnfolderBase]: 4336/6433 cut-off events. [2024-06-21 21:56:31,091 INFO L125 PetriNetUnfolderBase]: For 806615/806615 co-relation queries the response was YES. [2024-06-21 21:56:31,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62555 conditions, 6433 events. 4336/6433 cut-off events. For 806615/806615 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34535 event pairs, 935 based on Foata normal form. 12/6443 useless extension candidates. Maximal degree in co-relation 62410. Up to 5469 conditions per place. [2024-06-21 21:56:31,189 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 365 selfloop transitions, 119 changer transitions 0/487 dead transitions. [2024-06-21 21:56:31,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 487 transitions, 8603 flow [2024-06-21 21:56:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:56:31,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 21:56:31,192 INFO L175 Difference]: Start difference. First operand has 307 places, 459 transitions, 7363 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:56:31,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 487 transitions, 8603 flow [2024-06-21 21:56:33,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 487 transitions, 8487 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 21:56:33,108 INFO L231 Difference]: Finished difference. Result has 308 places, 459 transitions, 7502 flow [2024-06-21 21:56:33,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7251, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7502, PETRI_PLACES=308, PETRI_TRANSITIONS=459} [2024-06-21 21:56:33,117 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 268 predicate places. [2024-06-21 21:56:33,117 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 459 transitions, 7502 flow [2024-06-21 21:56:33,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:33,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:33,118 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 21:56:33,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:56:33,118 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 21:56:33,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash -249892022, now seen corresponding path program 12 times [2024-06-21 21:56:33,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:33,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80514505] [2024-06-21 21:56:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:33,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:33,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80514505] [2024-06-21 21:56:33,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80514505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:33,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447369761] [2024-06-21 21:56:33,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:33,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:33,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:33,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:33,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 459 transitions, 7502 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:33,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:33,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:33,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:35,014 INFO L124 PetriNetUnfolderBase]: 4302/6386 cut-off events. [2024-06-21 21:56:35,015 INFO L125 PetriNetUnfolderBase]: For 756279/756279 co-relation queries the response was YES. [2024-06-21 21:56:35,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61744 conditions, 6386 events. 4302/6386 cut-off events. For 756279/756279 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 34286 event pairs, 1192 based on Foata normal form. 8/6392 useless extension candidates. Maximal degree in co-relation 61600. Up to 6192 conditions per place. [2024-06-21 21:56:35,100 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 425 selfloop transitions, 51 changer transitions 0/479 dead transitions. [2024-06-21 21:56:35,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 479 transitions, 8542 flow [2024-06-21 21:56:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:56:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:56:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 21:56:35,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38746438746438744 [2024-06-21 21:56:35,102 INFO L175 Difference]: Start difference. First operand has 308 places, 459 transitions, 7502 flow. Second operand 9 states and 136 transitions. [2024-06-21 21:56:35,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 479 transitions, 8542 flow [2024-06-21 21:56:37,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 479 transitions, 8313 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:37,227 INFO L231 Difference]: Finished difference. Result has 312 places, 459 transitions, 7383 flow [2024-06-21 21:56:37,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7273, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7383, PETRI_PLACES=312, PETRI_TRANSITIONS=459} [2024-06-21 21:56:37,227 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 272 predicate places. [2024-06-21 21:56:37,228 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 459 transitions, 7383 flow [2024-06-21 21:56:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:37,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:37,228 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 21:56:37,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:56:37,228 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 21:56:37,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1959440699, now seen corresponding path program 5 times [2024-06-21 21:56:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:37,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423362540] [2024-06-21 21:56:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:37,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:37,999 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 21:56:37,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423362540] [2024-06-21 21:56:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423362540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269667593] [2024-06-21 21:56:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:38,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:38,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:38,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:38,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:38,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 459 transitions, 7383 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:56:38,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:38,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:38,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:39,563 INFO L124 PetriNetUnfolderBase]: 4460/6648 cut-off events. [2024-06-21 21:56:39,563 INFO L125 PetriNetUnfolderBase]: For 801046/801046 co-relation queries the response was YES. [2024-06-21 21:56:39,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62741 conditions, 6648 events. 4460/6648 cut-off events. For 801046/801046 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36246 event pairs, 865 based on Foata normal form. 20/6666 useless extension candidates. Maximal degree in co-relation 62596. Up to 6086 conditions per place. [2024-06-21 21:56:39,674 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 448 selfloop transitions, 57 changer transitions 0/508 dead transitions. [2024-06-21 21:56:39,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 508 transitions, 8697 flow [2024-06-21 21:56:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:56:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:56:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:56:39,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586894586894587 [2024-06-21 21:56:39,675 INFO L175 Difference]: Start difference. First operand has 312 places, 459 transitions, 7383 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:56:39,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 508 transitions, 8697 flow [2024-06-21 21:56:42,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 508 transitions, 8579 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:56:42,149 INFO L231 Difference]: Finished difference. Result has 313 places, 464 transitions, 7514 flow [2024-06-21 21:56:42,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7265, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7514, PETRI_PLACES=313, PETRI_TRANSITIONS=464} [2024-06-21 21:56:42,150 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 273 predicate places. [2024-06-21 21:56:42,150 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 464 transitions, 7514 flow [2024-06-21 21:56:42,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:56:42,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:42,150 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 21:56:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:56:42,151 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 21:56:42,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:42,151 INFO L85 PathProgramCache]: Analyzing trace with hash -620782036, now seen corresponding path program 2 times [2024-06-21 21:56:42,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:42,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921764295] [2024-06-21 21:56:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:42,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:42,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:42,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921764295] [2024-06-21 21:56:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921764295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:42,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:42,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:56:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105116291] [2024-06-21 21:56:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:56:42,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:56:42,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:56:42,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:42,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 464 transitions, 7514 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:56:42,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:42,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:42,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:44,477 INFO L124 PetriNetUnfolderBase]: 4468/6660 cut-off events. [2024-06-21 21:56:44,478 INFO L125 PetriNetUnfolderBase]: For 774088/774088 co-relation queries the response was YES. [2024-06-21 21:56:44,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63456 conditions, 6660 events. 4468/6660 cut-off events. For 774088/774088 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 36435 event pairs, 1153 based on Foata normal form. 2/6660 useless extension candidates. Maximal degree in co-relation 63310. Up to 6567 conditions per place. [2024-06-21 21:56:44,585 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 437 selfloop transitions, 44 changer transitions 0/484 dead transitions. [2024-06-21 21:56:44,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 484 transitions, 8578 flow [2024-06-21 21:56:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:56:44,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-06-21 21:56:44,587 INFO L175 Difference]: Start difference. First operand has 313 places, 464 transitions, 7514 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:56:44,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 484 transitions, 8578 flow [2024-06-21 21:56:46,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 484 transitions, 8448 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:46,991 INFO L231 Difference]: Finished difference. Result has 315 places, 466 transitions, 7529 flow [2024-06-21 21:56:46,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7384, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7529, PETRI_PLACES=315, PETRI_TRANSITIONS=466} [2024-06-21 21:56:46,992 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 275 predicate places. [2024-06-21 21:56:46,992 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 466 transitions, 7529 flow [2024-06-21 21:56:46,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:56:46,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:46,992 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 21:56:46,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:56:46,992 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 21:56:46,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash -249884086, now seen corresponding path program 3 times [2024-06-21 21:56:46,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:46,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013357033] [2024-06-21 21:56:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:46,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:47,806 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 21:56:47,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:47,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013357033] [2024-06-21 21:56:47,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013357033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:47,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:47,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:56:47,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803091526] [2024-06-21 21:56:47,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:47,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:56:47,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:56:47,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:56:47,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:47,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 466 transitions, 7529 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:56:47,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:47,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:47,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:49,321 INFO L124 PetriNetUnfolderBase]: 4476/6672 cut-off events. [2024-06-21 21:56:49,322 INFO L125 PetriNetUnfolderBase]: For 792960/792960 co-relation queries the response was YES. [2024-06-21 21:56:49,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63459 conditions, 6672 events. 4476/6672 cut-off events. For 792960/792960 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36526 event pairs, 1230 based on Foata normal form. 2/6672 useless extension candidates. Maximal degree in co-relation 63312. Up to 6637 conditions per place. [2024-06-21 21:56:49,434 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 457 selfloop transitions, 19 changer transitions 0/479 dead transitions. [2024-06-21 21:56:49,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 479 transitions, 8561 flow [2024-06-21 21:56:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-21 21:56:49,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663003663003663 [2024-06-21 21:56:49,436 INFO L175 Difference]: Start difference. First operand has 315 places, 466 transitions, 7529 flow. Second operand 7 states and 100 transitions. [2024-06-21 21:56:49,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 479 transitions, 8561 flow [2024-06-21 21:56:52,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 479 transitions, 8434 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:52,091 INFO L231 Difference]: Finished difference. Result has 317 places, 468 transitions, 7497 flow [2024-06-21 21:56:52,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7406, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7497, PETRI_PLACES=317, PETRI_TRANSITIONS=468} [2024-06-21 21:56:52,092 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 277 predicate places. [2024-06-21 21:56:52,092 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 468 transitions, 7497 flow [2024-06-21 21:56:52,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:56:52,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:52,092 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 21:56:52,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:56:52,093 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 21:56:52,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash -236997479, now seen corresponding path program 1 times [2024-06-21 21:56:52,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:52,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767363572] [2024-06-21 21:56:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:52,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:52,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767363572] [2024-06-21 21:56:52,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767363572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:52,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:52,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:52,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678464817] [2024-06-21 21:56:52,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:52,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:52,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:52,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:52,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 468 transitions, 7497 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:56:52,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:52,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:52,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:54,441 INFO L124 PetriNetUnfolderBase]: 4490/6692 cut-off events. [2024-06-21 21:56:54,441 INFO L125 PetriNetUnfolderBase]: For 790720/790720 co-relation queries the response was YES. [2024-06-21 21:56:54,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63487 conditions, 6692 events. 4490/6692 cut-off events. For 790720/790720 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36592 event pairs, 1228 based on Foata normal form. 3/6693 useless extension candidates. Maximal degree in co-relation 63339. Up to 6443 conditions per place. [2024-06-21 21:56:54,539 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 428 selfloop transitions, 69 changer transitions 0/500 dead transitions. [2024-06-21 21:56:54,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 500 transitions, 8954 flow [2024-06-21 21:56:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:56:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:56:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 21:56:54,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-06-21 21:56:54,540 INFO L175 Difference]: Start difference. First operand has 317 places, 468 transitions, 7497 flow. Second operand 9 states and 138 transitions. [2024-06-21 21:56:54,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 500 transitions, 8954 flow [2024-06-21 21:56:56,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 500 transitions, 8879 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:56,972 INFO L231 Difference]: Finished difference. Result has 323 places, 480 transitions, 7866 flow [2024-06-21 21:56:56,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7866, PETRI_PLACES=323, PETRI_TRANSITIONS=480} [2024-06-21 21:56:56,973 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 283 predicate places. [2024-06-21 21:56:56,973 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 480 transitions, 7866 flow [2024-06-21 21:56:56,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:56:56,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:56,973 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 21:56:56,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:56:56,973 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 21:56:56,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -236997076, now seen corresponding path program 4 times [2024-06-21 21:56:56,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:56,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952344099] [2024-06-21 21:56:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:56,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:57,634 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 21:56:57,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:57,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952344099] [2024-06-21 21:56:57,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952344099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:57,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:57,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068081865] [2024-06-21 21:56:57,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:57,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:57,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:56:57,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 480 transitions, 7866 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:56:57,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:57,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:56:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:59,236 INFO L124 PetriNetUnfolderBase]: 4498/6704 cut-off events. [2024-06-21 21:56:59,237 INFO L125 PetriNetUnfolderBase]: For 811583/811583 co-relation queries the response was YES. [2024-06-21 21:56:59,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64738 conditions, 6704 events. 4498/6704 cut-off events. For 811583/811583 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36661 event pairs, 1237 based on Foata normal form. 2/6704 useless extension candidates. Maximal degree in co-relation 64587. Up to 6660 conditions per place. [2024-06-21 21:56:59,347 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 467 selfloop transitions, 23 changer transitions 0/493 dead transitions. [2024-06-21 21:56:59,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 493 transitions, 8926 flow [2024-06-21 21:56:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-21 21:56:59,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663003663003663 [2024-06-21 21:56:59,349 INFO L175 Difference]: Start difference. First operand has 323 places, 480 transitions, 7866 flow. Second operand 7 states and 100 transitions. [2024-06-21 21:56:59,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 493 transitions, 8926 flow [2024-06-21 21:57:01,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 493 transitions, 8754 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-21 21:57:01,458 INFO L231 Difference]: Finished difference. Result has 326 places, 482 transitions, 7800 flow [2024-06-21 21:57:01,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7694, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7800, PETRI_PLACES=326, PETRI_TRANSITIONS=482} [2024-06-21 21:57:01,459 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 286 predicate places. [2024-06-21 21:57:01,459 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 482 transitions, 7800 flow [2024-06-21 21:57:01,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:57:01,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:01,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:01,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:57:01,460 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 21:57:01,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash -236551606, now seen corresponding path program 5 times [2024-06-21 21:57:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:01,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999091433] [2024-06-21 21:57:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:01,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:02,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:02,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999091433] [2024-06-21 21:57:02,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999091433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:02,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:02,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:57:02,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034612866] [2024-06-21 21:57:02,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:57:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:57:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:57:02,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:02,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 482 transitions, 7800 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:02,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:02,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:02,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:03,665 INFO L124 PetriNetUnfolderBase]: 4493/6697 cut-off events. [2024-06-21 21:57:03,665 INFO L125 PetriNetUnfolderBase]: For 823819/823819 co-relation queries the response was YES. [2024-06-21 21:57:03,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64479 conditions, 6697 events. 4493/6697 cut-off events. For 823819/823819 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36593 event pairs, 1220 based on Foata normal form. 2/6697 useless extension candidates. Maximal degree in co-relation 64327. Up to 6660 conditions per place. [2024-06-21 21:57:03,768 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 475 selfloop transitions, 17 changer transitions 0/495 dead transitions. [2024-06-21 21:57:03,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 495 transitions, 8862 flow [2024-06-21 21:57:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-06-21 21:57:03,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2024-06-21 21:57:03,769 INFO L175 Difference]: Start difference. First operand has 326 places, 482 transitions, 7800 flow. Second operand 7 states and 99 transitions. [2024-06-21 21:57:03,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 495 transitions, 8862 flow [2024-06-21 21:57:05,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 495 transitions, 8768 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:05,946 INFO L231 Difference]: Finished difference. Result has 328 places, 484 transitions, 7801 flow [2024-06-21 21:57:05,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7710, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7801, PETRI_PLACES=328, PETRI_TRANSITIONS=484} [2024-06-21 21:57:05,946 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 288 predicate places. [2024-06-21 21:57:05,946 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 484 transitions, 7801 flow [2024-06-21 21:57:05,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:05,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:05,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:57:05,947 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 21:57:05,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash 336546766, now seen corresponding path program 13 times [2024-06-21 21:57:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:05,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126416900] [2024-06-21 21:57:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:05,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126416900] [2024-06-21 21:57:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126416900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:57:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788548194] [2024-06-21 21:57:06,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:57:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:57:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:57:06,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:06,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 484 transitions, 7801 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:57:06,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:06,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:06,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:08,241 INFO L124 PetriNetUnfolderBase]: 4929/7309 cut-off events. [2024-06-21 21:57:08,241 INFO L125 PetriNetUnfolderBase]: For 880903/880903 co-relation queries the response was YES. [2024-06-21 21:57:08,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69954 conditions, 7309 events. 4929/7309 cut-off events. For 880903/880903 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40258 event pairs, 1098 based on Foata normal form. 12/7319 useless extension candidates. Maximal degree in co-relation 69801. Up to 6548 conditions per place. [2024-06-21 21:57:08,351 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 448 selfloop transitions, 127 changer transitions 0/578 dead transitions. [2024-06-21 21:57:08,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 578 transitions, 10434 flow [2024-06-21 21:57:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:57:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:57:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:57:08,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41794871794871796 [2024-06-21 21:57:08,353 INFO L175 Difference]: Start difference. First operand has 328 places, 484 transitions, 7801 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:57:08,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 578 transitions, 10434 flow [2024-06-21 21:57:10,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 578 transitions, 10359 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:10,420 INFO L231 Difference]: Finished difference. Result has 337 places, 541 transitions, 9282 flow [2024-06-21 21:57:10,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9282, PETRI_PLACES=337, PETRI_TRANSITIONS=541} [2024-06-21 21:57:10,421 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 297 predicate places. [2024-06-21 21:57:10,421 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 541 transitions, 9282 flow [2024-06-21 21:57:10,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:57:10,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:10,421 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 21:57:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:57:10,422 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 21:57:10,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -307826812, now seen corresponding path program 14 times [2024-06-21 21:57:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:10,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357211595] [2024-06-21 21:57:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:11,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:11,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357211595] [2024-06-21 21:57:11,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357211595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:11,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:11,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:57:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946279307] [2024-06-21 21:57:11,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:11,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:57:11,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:57:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:57:11,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:11,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 541 transitions, 9282 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:57:11,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:11,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:11,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:13,015 INFO L124 PetriNetUnfolderBase]: 4877/7237 cut-off events. [2024-06-21 21:57:13,015 INFO L125 PetriNetUnfolderBase]: For 868452/868452 co-relation queries the response was YES. [2024-06-21 21:57:13,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70173 conditions, 7237 events. 4877/7237 cut-off events. For 868452/868452 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39841 event pairs, 1104 based on Foata normal form. 12/7247 useless extension candidates. Maximal degree in co-relation 70015. Up to 6520 conditions per place. [2024-06-21 21:57:13,119 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 447 selfloop transitions, 129 changer transitions 0/579 dead transitions. [2024-06-21 21:57:13,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 579 transitions, 10855 flow [2024-06-21 21:57:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:57:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:57:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 21:57:13,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40559440559440557 [2024-06-21 21:57:13,120 INFO L175 Difference]: Start difference. First operand has 337 places, 541 transitions, 9282 flow. Second operand 11 states and 174 transitions. [2024-06-21 21:57:13,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 579 transitions, 10855 flow [2024-06-21 21:57:16,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 579 transitions, 10626 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 21:57:16,277 INFO L231 Difference]: Finished difference. Result has 347 places, 547 transitions, 9542 flow [2024-06-21 21:57:16,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9053, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9542, PETRI_PLACES=347, PETRI_TRANSITIONS=547} [2024-06-21 21:57:16,277 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 307 predicate places. [2024-06-21 21:57:16,277 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 547 transitions, 9542 flow [2024-06-21 21:57:16,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 21:57:16,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:16,278 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 21:57:16,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:57:16,278 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 21:57:16,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1612704432, now seen corresponding path program 1 times [2024-06-21 21:57:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:16,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369494181] [2024-06-21 21:57:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:17,086 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 21:57:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369494181] [2024-06-21 21:57:17,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369494181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:17,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:57:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147254449] [2024-06-21 21:57:17,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:17,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:57:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:57:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:57:17,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:17,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 547 transitions, 9542 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:57:17,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:17,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:17,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:19,123 INFO L124 PetriNetUnfolderBase]: 4951/7351 cut-off events. [2024-06-21 21:57:19,123 INFO L125 PetriNetUnfolderBase]: For 905198/905198 co-relation queries the response was YES. [2024-06-21 21:57:19,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72236 conditions, 7351 events. 4951/7351 cut-off events. For 905198/905198 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40647 event pairs, 1357 based on Foata normal form. 8/7357 useless extension candidates. Maximal degree in co-relation 72074. Up to 7058 conditions per place. [2024-06-21 21:57:19,224 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 527 selfloop transitions, 49 changer transitions 0/579 dead transitions. [2024-06-21 21:57:19,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 579 transitions, 11034 flow [2024-06-21 21:57:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:57:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:57:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 21:57:19,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-06-21 21:57:19,226 INFO L175 Difference]: Start difference. First operand has 347 places, 547 transitions, 9542 flow. Second operand 9 states and 138 transitions. [2024-06-21 21:57:19,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 579 transitions, 11034 flow [2024-06-21 21:57:22,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 579 transitions, 10724 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:57:22,641 INFO L231 Difference]: Finished difference. Result has 346 places, 549 transitions, 9372 flow [2024-06-21 21:57:22,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9232, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9372, PETRI_PLACES=346, PETRI_TRANSITIONS=549} [2024-06-21 21:57:22,642 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 306 predicate places. [2024-06-21 21:57:22,642 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 549 transitions, 9372 flow [2024-06-21 21:57:22,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:57:22,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:22,642 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 21:57:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:57:22,642 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 21:57:22,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2014091888, now seen corresponding path program 2 times [2024-06-21 21:57:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:22,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328476173] [2024-06-21 21:57:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:23,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:23,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328476173] [2024-06-21 21:57:23,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328476173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:23,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:23,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:57:23,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340993488] [2024-06-21 21:57:23,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:23,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:57:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:57:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:57:23,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:23,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 549 transitions, 9372 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:23,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:23,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:23,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:25,513 INFO L124 PetriNetUnfolderBase]: 5051/7503 cut-off events. [2024-06-21 21:57:25,513 INFO L125 PetriNetUnfolderBase]: For 963182/963182 co-relation queries the response was YES. [2024-06-21 21:57:25,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73879 conditions, 7503 events. 5051/7503 cut-off events. For 963182/963182 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 41759 event pairs, 1420 based on Foata normal form. 8/7509 useless extension candidates. Maximal degree in co-relation 73716. Up to 7272 conditions per place. [2024-06-21 21:57:25,640 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 528 selfloop transitions, 47 changer transitions 0/578 dead transitions. [2024-06-21 21:57:25,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 578 transitions, 10864 flow [2024-06-21 21:57:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:57:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:57:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 21:57:25,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903133903133903 [2024-06-21 21:57:25,641 INFO L175 Difference]: Start difference. First operand has 346 places, 549 transitions, 9372 flow. Second operand 9 states and 137 transitions. [2024-06-21 21:57:25,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 578 transitions, 10864 flow [2024-06-21 21:57:28,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 578 transitions, 10802 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:28,778 INFO L231 Difference]: Finished difference. Result has 350 places, 551 transitions, 9450 flow [2024-06-21 21:57:28,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9310, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9450, PETRI_PLACES=350, PETRI_TRANSITIONS=551} [2024-06-21 21:57:28,779 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 310 predicate places. [2024-06-21 21:57:28,779 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 551 transitions, 9450 flow [2024-06-21 21:57:28,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:28,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:28,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:28,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:57:28,780 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 21:57:28,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -582447104, now seen corresponding path program 3 times [2024-06-21 21:57:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:28,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189146267] [2024-06-21 21:57:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:29,490 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 21:57:29,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:29,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189146267] [2024-06-21 21:57:29,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189146267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:29,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:29,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:57:29,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9289754] [2024-06-21 21:57:29,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:29,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:57:29,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:29,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:57:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:57:29,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:29,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 551 transitions, 9450 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:29,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:29,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:29,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:31,388 INFO L124 PetriNetUnfolderBase]: 5023/7463 cut-off events. [2024-06-21 21:57:31,388 INFO L125 PetriNetUnfolderBase]: For 957706/957706 co-relation queries the response was YES. [2024-06-21 21:57:31,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73040 conditions, 7463 events. 5023/7463 cut-off events. For 957706/957706 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 41427 event pairs, 1422 based on Foata normal form. 12/7473 useless extension candidates. Maximal degree in co-relation 72875. Up to 7298 conditions per place. [2024-06-21 21:57:31,515 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 525 selfloop transitions, 45 changer transitions 0/573 dead transitions. [2024-06-21 21:57:31,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 573 transitions, 10706 flow [2024-06-21 21:57:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:57:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:57:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:57:31,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40064102564102566 [2024-06-21 21:57:31,517 INFO L175 Difference]: Start difference. First operand has 350 places, 551 transitions, 9450 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:57:31,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 573 transitions, 10706 flow [2024-06-21 21:57:35,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 573 transitions, 10637 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:35,524 INFO L231 Difference]: Finished difference. Result has 353 places, 551 transitions, 9477 flow [2024-06-21 21:57:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9381, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9477, PETRI_PLACES=353, PETRI_TRANSITIONS=551} [2024-06-21 21:57:35,525 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 313 predicate places. [2024-06-21 21:57:35,525 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 551 transitions, 9477 flow [2024-06-21 21:57:35,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:35,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:35,525 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 21:57:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:57:35,526 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 21:57:35,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1204274168, now seen corresponding path program 4 times [2024-06-21 21:57:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928133077] [2024-06-21 21:57:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928133077] [2024-06-21 21:57:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928133077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:36,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:36,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:57:36,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124736517] [2024-06-21 21:57:36,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:36,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:57:36,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:57:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:57:36,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:36,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 551 transitions, 9477 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:57:36,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:36,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:36,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:38,172 INFO L124 PetriNetUnfolderBase]: 5067/7531 cut-off events. [2024-06-21 21:57:38,172 INFO L125 PetriNetUnfolderBase]: For 979496/979496 co-relation queries the response was YES. [2024-06-21 21:57:38,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73736 conditions, 7531 events. 5067/7531 cut-off events. For 979496/979496 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41954 event pairs, 1430 based on Foata normal form. 12/7541 useless extension candidates. Maximal degree in co-relation 73569. Up to 7389 conditions per place. [2024-06-21 21:57:38,293 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 533 selfloop transitions, 37 changer transitions 0/573 dead transitions. [2024-06-21 21:57:38,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 573 transitions, 10748 flow [2024-06-21 21:57:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:57:38,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2024-06-21 21:57:38,294 INFO L175 Difference]: Start difference. First operand has 353 places, 551 transitions, 9477 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:57:38,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 573 transitions, 10748 flow [2024-06-21 21:57:41,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 573 transitions, 10653 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:57:41,505 INFO L231 Difference]: Finished difference. Result has 353 places, 552 transitions, 9488 flow [2024-06-21 21:57:41,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9488, PETRI_PLACES=353, PETRI_TRANSITIONS=552} [2024-06-21 21:57:41,506 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 313 predicate places. [2024-06-21 21:57:41,506 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 552 transitions, 9488 flow [2024-06-21 21:57:41,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:57:41,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:41,506 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 21:57:41,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:57:41,507 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 21:57:41,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash -443619826, now seen corresponding path program 5 times [2024-06-21 21:57:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:41,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343034183] [2024-06-21 21:57:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:42,210 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 21:57:42,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:42,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343034183] [2024-06-21 21:57:42,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343034183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:42,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:42,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:57:42,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967125425] [2024-06-21 21:57:42,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:42,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:57:42,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:57:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:57:42,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:42,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 552 transitions, 9488 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:57:42,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:42,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:42,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:44,019 INFO L124 PetriNetUnfolderBase]: 5095/7575 cut-off events. [2024-06-21 21:57:44,019 INFO L125 PetriNetUnfolderBase]: For 987662/987662 co-relation queries the response was YES. [2024-06-21 21:57:44,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74287 conditions, 7575 events. 5095/7575 cut-off events. For 987662/987662 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42283 event pairs, 1385 based on Foata normal form. 8/7581 useless extension candidates. Maximal degree in co-relation 74119. Up to 7297 conditions per place. [2024-06-21 21:57:44,143 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 536 selfloop transitions, 41 changer transitions 0/580 dead transitions. [2024-06-21 21:57:44,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 580 transitions, 10962 flow [2024-06-21 21:57:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:57:44,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 21:57:44,144 INFO L175 Difference]: Start difference. First operand has 353 places, 552 transitions, 9488 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:57:44,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 580 transitions, 10962 flow [2024-06-21 21:57:47,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 580 transitions, 10884 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:47,415 INFO L231 Difference]: Finished difference. Result has 355 places, 553 transitions, 9520 flow [2024-06-21 21:57:47,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9410, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9520, PETRI_PLACES=355, PETRI_TRANSITIONS=553} [2024-06-21 21:57:47,416 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 315 predicate places. [2024-06-21 21:57:47,416 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 553 transitions, 9520 flow [2024-06-21 21:57:47,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:57:47,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:47,417 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 21:57:47,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:57:47,417 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 21:57:47,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -236812564, now seen corresponding path program 1 times [2024-06-21 21:57:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:47,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96580576] [2024-06-21 21:57:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96580576] [2024-06-21 21:57:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96580576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:57:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973101156] [2024-06-21 21:57:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:57:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:57:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:57:48,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:48,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 553 transitions, 9520 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:48,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:48,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:48,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:50,119 INFO L124 PetriNetUnfolderBase]: 5067/7535 cut-off events. [2024-06-21 21:57:50,120 INFO L125 PetriNetUnfolderBase]: For 980175/980175 co-relation queries the response was YES. [2024-06-21 21:57:50,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73234 conditions, 7535 events. 5067/7535 cut-off events. For 980175/980175 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 42047 event pairs, 1422 based on Foata normal form. 12/7545 useless extension candidates. Maximal degree in co-relation 73065. Up to 7399 conditions per place. [2024-06-21 21:57:50,244 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 535 selfloop transitions, 38 changer transitions 0/576 dead transitions. [2024-06-21 21:57:50,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 576 transitions, 10779 flow [2024-06-21 21:57:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:57:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:57:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 21:57:50,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817663817663818 [2024-06-21 21:57:50,246 INFO L175 Difference]: Start difference. First operand has 355 places, 553 transitions, 9520 flow. Second operand 9 states and 134 transitions. [2024-06-21 21:57:50,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 576 transitions, 10779 flow [2024-06-21 21:57:53,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 576 transitions, 10636 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:57:53,925 INFO L231 Difference]: Finished difference. Result has 358 places, 553 transitions, 9459 flow [2024-06-21 21:57:53,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9377, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9459, PETRI_PLACES=358, PETRI_TRANSITIONS=553} [2024-06-21 21:57:53,925 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 318 predicate places. [2024-06-21 21:57:53,925 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 553 transitions, 9459 flow [2024-06-21 21:57:53,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:53,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:53,926 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 21:57:53,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:57:53,926 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 21:57:53,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash -236545654, now seen corresponding path program 2 times [2024-06-21 21:57:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:53,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390380899] [2024-06-21 21:57:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:53,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:54,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:54,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390380899] [2024-06-21 21:57:54,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390380899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:54,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:54,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:57:54,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974934594] [2024-06-21 21:57:54,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:54,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:57:54,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:57:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:57:54,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:57:54,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 553 transitions, 9459 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:57:54,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:54,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:57:54,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:56,548 INFO L124 PetriNetUnfolderBase]: 5049/7509 cut-off events. [2024-06-21 21:57:56,548 INFO L125 PetriNetUnfolderBase]: For 954407/954407 co-relation queries the response was YES. [2024-06-21 21:57:56,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72257 conditions, 7509 events. 5049/7509 cut-off events. For 954407/954407 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 41781 event pairs, 1398 based on Foata normal form. 8/7515 useless extension candidates. Maximal degree in co-relation 72088. Up to 7277 conditions per place. [2024-06-21 21:57:56,669 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 533 selfloop transitions, 42 changer transitions 0/578 dead transitions. [2024-06-21 21:57:56,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 578 transitions, 10741 flow [2024-06-21 21:57:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:57:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:57:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 21:57:56,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:57:56,670 INFO L175 Difference]: Start difference. First operand has 358 places, 553 transitions, 9459 flow. Second operand 9 states and 135 transitions. [2024-06-21 21:57:56,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 578 transitions, 10741 flow [2024-06-21 21:58:00,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 578 transitions, 10647 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:58:00,426 INFO L231 Difference]: Finished difference. Result has 359 places, 553 transitions, 9453 flow [2024-06-21 21:58:00,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9365, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9453, PETRI_PLACES=359, PETRI_TRANSITIONS=553} [2024-06-21 21:58:00,427 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 319 predicate places. [2024-06-21 21:58:00,427 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 553 transitions, 9453 flow [2024-06-21 21:58:00,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:58:00,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:00,427 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 21:58:00,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:58:00,428 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 21:58:00,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash 663072220, now seen corresponding path program 1 times [2024-06-21 21:58:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:00,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456220400] [2024-06-21 21:58:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:01,015 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 21:58:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:01,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456220400] [2024-06-21 21:58:01,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456220400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:01,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:01,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:58:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934100604] [2024-06-21 21:58:01,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:01,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:58:01,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:58:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:58:01,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:01,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 553 transitions, 9453 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:01,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:01,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:01,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:02,976 INFO L124 PetriNetUnfolderBase]: 5331/7898 cut-off events. [2024-06-21 21:58:02,977 INFO L125 PetriNetUnfolderBase]: For 1082508/1082510 co-relation queries the response was YES. [2024-06-21 21:58:03,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78695 conditions, 7898 events. 5331/7898 cut-off events. For 1082508/1082510 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44133 event pairs, 1020 based on Foata normal form. 2/7898 useless extension candidates. Maximal degree in co-relation 78525. Up to 5529 conditions per place. [2024-06-21 21:58:03,098 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 325 selfloop transitions, 290 changer transitions 0/618 dead transitions. [2024-06-21 21:58:03,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 618 transitions, 11942 flow [2024-06-21 21:58:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:58:03,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 21:58:03,099 INFO L175 Difference]: Start difference. First operand has 359 places, 553 transitions, 9453 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:58:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 618 transitions, 11942 flow [2024-06-21 21:58:06,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 618 transitions, 11817 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:58:06,945 INFO L231 Difference]: Finished difference. Result has 361 places, 580 transitions, 10608 flow [2024-06-21 21:58:06,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9328, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10608, PETRI_PLACES=361, PETRI_TRANSITIONS=580} [2024-06-21 21:58:06,948 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 321 predicate places. [2024-06-21 21:58:06,948 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 580 transitions, 10608 flow [2024-06-21 21:58:06,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:06,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:06,949 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 21:58:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:58:06,949 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 21:58:06,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1183180116, now seen corresponding path program 2 times [2024-06-21 21:58:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239630852] [2024-06-21 21:58:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:07,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:07,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239630852] [2024-06-21 21:58:07,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239630852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:07,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:07,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:58:07,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58695157] [2024-06-21 21:58:07,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:07,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:58:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:58:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:58:07,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:07,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 580 transitions, 10608 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:07,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:07,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:07,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:09,702 INFO L124 PetriNetUnfolderBase]: 5341/7912 cut-off events. [2024-06-21 21:58:09,702 INFO L125 PetriNetUnfolderBase]: For 1115596/1115598 co-relation queries the response was YES. [2024-06-21 21:58:09,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81395 conditions, 7912 events. 5341/7912 cut-off events. For 1115596/1115598 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 44166 event pairs, 907 based on Foata normal form. 2/7912 useless extension candidates. Maximal degree in co-relation 81223. Up to 6041 conditions per place. [2024-06-21 21:58:09,825 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 314 selfloop transitions, 308 changer transitions 0/625 dead transitions. [2024-06-21 21:58:09,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 625 transitions, 12705 flow [2024-06-21 21:58:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:58:09,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2024-06-21 21:58:09,827 INFO L175 Difference]: Start difference. First operand has 361 places, 580 transitions, 10608 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:58:09,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 625 transitions, 12705 flow [2024-06-21 21:58:14,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 625 transitions, 12310 flow, removed 100 selfloop flow, removed 3 redundant places. [2024-06-21 21:58:14,095 INFO L231 Difference]: Finished difference. Result has 367 places, 583 transitions, 10932 flow [2024-06-21 21:58:14,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10253, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10932, PETRI_PLACES=367, PETRI_TRANSITIONS=583} [2024-06-21 21:58:14,096 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 327 predicate places. [2024-06-21 21:58:14,096 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 583 transitions, 10932 flow [2024-06-21 21:58:14,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:14,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:14,097 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 21:58:14,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:58:14,097 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 21:58:14,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:14,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2017156834, now seen corresponding path program 3 times [2024-06-21 21:58:14,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444191091] [2024-06-21 21:58:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:14,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:14,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444191091] [2024-06-21 21:58:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444191091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:14,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:14,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854315433] [2024-06-21 21:58:14,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:14,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:14,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:14,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:14,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:14,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:14,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 583 transitions, 10932 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 21:58:14,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:14,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:14,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:17,003 INFO L124 PetriNetUnfolderBase]: 5327/7892 cut-off events. [2024-06-21 21:58:17,003 INFO L125 PetriNetUnfolderBase]: For 1102934/1102936 co-relation queries the response was YES. [2024-06-21 21:58:17,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82082 conditions, 7892 events. 5327/7892 cut-off events. For 1102934/1102936 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44028 event pairs, 1013 based on Foata normal form. 4/7894 useless extension candidates. Maximal degree in co-relation 81908. Up to 7442 conditions per place. [2024-06-21 21:58:17,124 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 513 selfloop transitions, 108 changer transitions 0/624 dead transitions. [2024-06-21 21:58:17,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 624 transitions, 12704 flow [2024-06-21 21:58:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 21:58:17,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41595441595441596 [2024-06-21 21:58:17,126 INFO L175 Difference]: Start difference. First operand has 367 places, 583 transitions, 10932 flow. Second operand 9 states and 146 transitions. [2024-06-21 21:58:17,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 624 transitions, 12704 flow [2024-06-21 21:58:21,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 624 transitions, 12224 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:21,873 INFO L231 Difference]: Finished difference. Result has 371 places, 595 transitions, 10943 flow [2024-06-21 21:58:21,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10452, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10943, PETRI_PLACES=371, PETRI_TRANSITIONS=595} [2024-06-21 21:58:21,873 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 331 predicate places. [2024-06-21 21:58:21,873 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 595 transitions, 10943 flow [2024-06-21 21:58:21,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 21:58:21,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:21,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:21,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:58:21,874 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:21,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2130052062, now seen corresponding path program 4 times [2024-06-21 21:58:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:21,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785293624] [2024-06-21 21:58:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:22,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:22,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785293624] [2024-06-21 21:58:22,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785293624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:22,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:22,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:58:22,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868249394] [2024-06-21 21:58:22,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:22,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:58:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:58:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:58:22,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:22,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 595 transitions, 10943 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:22,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:22,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:22,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:24,754 INFO L124 PetriNetUnfolderBase]: 5309/7868 cut-off events. [2024-06-21 21:58:24,754 INFO L125 PetriNetUnfolderBase]: For 1119778/1119780 co-relation queries the response was YES. [2024-06-21 21:58:24,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80722 conditions, 7868 events. 5309/7868 cut-off events. For 1119778/1119780 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 43947 event pairs, 907 based on Foata normal form. 6/7872 useless extension candidates. Maximal degree in co-relation 80546. Up to 6293 conditions per place. [2024-06-21 21:58:24,877 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 372 selfloop transitions, 263 changer transitions 0/638 dead transitions. [2024-06-21 21:58:24,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 638 transitions, 13363 flow [2024-06-21 21:58:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:58:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:58:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 21:58:24,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 21:58:24,878 INFO L175 Difference]: Start difference. First operand has 371 places, 595 transitions, 10943 flow. Second operand 10 states and 177 transitions. [2024-06-21 21:58:24,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 638 transitions, 13363 flow [2024-06-21 21:58:28,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 638 transitions, 13118 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:29,014 INFO L231 Difference]: Finished difference. Result has 375 places, 595 transitions, 11232 flow [2024-06-21 21:58:29,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10698, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11232, PETRI_PLACES=375, PETRI_TRANSITIONS=595} [2024-06-21 21:58:29,029 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 335 predicate places. [2024-06-21 21:58:29,029 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 595 transitions, 11232 flow [2024-06-21 21:58:29,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:29,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:29,029 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 21:58:29,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:58:29,029 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 21:58:29,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1413166636, now seen corresponding path program 1 times [2024-06-21 21:58:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420090715] [2024-06-21 21:58:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420090715] [2024-06-21 21:58:29,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420090715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:29,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:29,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:58:29,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053537781] [2024-06-21 21:58:29,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:29,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:58:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:58:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:58:29,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:29,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 595 transitions, 11232 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:29,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:29,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:29,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:31,825 INFO L124 PetriNetUnfolderBase]: 5349/7924 cut-off events. [2024-06-21 21:58:31,826 INFO L125 PetriNetUnfolderBase]: For 1160560/1160562 co-relation queries the response was YES. [2024-06-21 21:58:31,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82385 conditions, 7924 events. 5349/7924 cut-off events. For 1160560/1160562 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44271 event pairs, 1058 based on Foata normal form. 8/7930 useless extension candidates. Maximal degree in co-relation 82208. Up to 5144 conditions per place. [2024-06-21 21:58:31,979 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 263 selfloop transitions, 381 changer transitions 0/647 dead transitions. [2024-06-21 21:58:31,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 647 transitions, 13835 flow [2024-06-21 21:58:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:58:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:58:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 21:58:31,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 21:58:31,981 INFO L175 Difference]: Start difference. First operand has 375 places, 595 transitions, 11232 flow. Second operand 11 states and 195 transitions. [2024-06-21 21:58:31,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 647 transitions, 13835 flow [2024-06-21 21:58:36,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 647 transitions, 13045 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 21:58:36,429 INFO L231 Difference]: Finished difference. Result has 379 places, 601 transitions, 11347 flow [2024-06-21 21:58:36,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10472, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11347, PETRI_PLACES=379, PETRI_TRANSITIONS=601} [2024-06-21 21:58:36,430 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 339 predicate places. [2024-06-21 21:58:36,430 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 601 transitions, 11347 flow [2024-06-21 21:58:36,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:36,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:36,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:36,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:58:36,431 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 21:58:36,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1412958936, now seen corresponding path program 5 times [2024-06-21 21:58:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937390466] [2024-06-21 21:58:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:37,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:37,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937390466] [2024-06-21 21:58:37,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937390466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:37,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:37,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:58:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982468583] [2024-06-21 21:58:37,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:37,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:58:37,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:58:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:58:37,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:37,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 601 transitions, 11347 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:37,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:37,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:37,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:39,204 INFO L124 PetriNetUnfolderBase]: 5343/7916 cut-off events. [2024-06-21 21:58:39,204 INFO L125 PetriNetUnfolderBase]: For 1144846/1144848 co-relation queries the response was YES. [2024-06-21 21:58:39,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82639 conditions, 7916 events. 5343/7916 cut-off events. For 1144846/1144848 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44190 event pairs, 1018 based on Foata normal form. 4/7918 useless extension candidates. Maximal degree in co-relation 82461. Up to 7548 conditions per place. [2024-06-21 21:58:39,339 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 530 selfloop transitions, 95 changer transitions 0/628 dead transitions. [2024-06-21 21:58:39,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 628 transitions, 12723 flow [2024-06-21 21:58:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 21:58:39,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 21:58:39,340 INFO L175 Difference]: Start difference. First operand has 379 places, 601 transitions, 11347 flow. Second operand 9 states and 144 transitions. [2024-06-21 21:58:39,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 628 transitions, 12723 flow [2024-06-21 21:58:43,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 628 transitions, 11745 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 21:58:43,459 INFO L231 Difference]: Finished difference. Result has 380 places, 601 transitions, 10565 flow [2024-06-21 21:58:43,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10369, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10565, PETRI_PLACES=380, PETRI_TRANSITIONS=601} [2024-06-21 21:58:43,460 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 340 predicate places. [2024-06-21 21:58:43,460 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 601 transitions, 10565 flow [2024-06-21 21:58:43,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:43,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:43,460 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 21:58:43,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:58:43,460 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 21:58:43,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:43,461 INFO L85 PathProgramCache]: Analyzing trace with hash 897612950, now seen corresponding path program 2 times [2024-06-21 21:58:43,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:43,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249699107] [2024-06-21 21:58:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:43,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249699107] [2024-06-21 21:58:44,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249699107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:44,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:44,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:58:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001062436] [2024-06-21 21:58:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:58:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:58:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:58:44,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:44,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 601 transitions, 10565 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:44,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:44,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:44,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:45,936 INFO L124 PetriNetUnfolderBase]: 5319/7884 cut-off events. [2024-06-21 21:58:45,936 INFO L125 PetriNetUnfolderBase]: For 1146914/1146916 co-relation queries the response was YES. [2024-06-21 21:58:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79892 conditions, 7884 events. 5319/7884 cut-off events. For 1146914/1146916 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 44047 event pairs, 1050 based on Foata normal form. 8/7890 useless extension candidates. Maximal degree in co-relation 79713. Up to 5129 conditions per place. [2024-06-21 21:58:46,069 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 264 selfloop transitions, 373 changer transitions 0/640 dead transitions. [2024-06-21 21:58:46,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 640 transitions, 12811 flow [2024-06-21 21:58:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:58:46,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-21 21:58:46,070 INFO L175 Difference]: Start difference. First operand has 380 places, 601 transitions, 10565 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:58:46,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 640 transitions, 12811 flow [2024-06-21 21:58:51,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 640 transitions, 12591 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 21:58:51,575 INFO L231 Difference]: Finished difference. Result has 382 places, 601 transitions, 11103 flow [2024-06-21 21:58:51,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10345, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11103, PETRI_PLACES=382, PETRI_TRANSITIONS=601} [2024-06-21 21:58:51,576 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 342 predicate places. [2024-06-21 21:58:51,576 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 601 transitions, 11103 flow [2024-06-21 21:58:51,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:51,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:51,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:58:51,577 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 21:58:51,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash 34542876, now seen corresponding path program 1 times [2024-06-21 21:58:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:51,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335291793] [2024-06-21 21:58:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:52,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:52,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335291793] [2024-06-21 21:58:52,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335291793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:52,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:52,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:58:52,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046069391] [2024-06-21 21:58:52,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:52,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:58:52,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:58:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:58:52,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:58:52,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 601 transitions, 11103 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:52,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:52,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:58:52,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:54,385 INFO L124 PetriNetUnfolderBase]: 5361/7946 cut-off events. [2024-06-21 21:58:54,385 INFO L125 PetriNetUnfolderBase]: For 1183924/1183926 co-relation queries the response was YES. [2024-06-21 21:58:54,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82808 conditions, 7946 events. 5361/7946 cut-off events. For 1183924/1183926 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 44505 event pairs, 988 based on Foata normal form. 6/7950 useless extension candidates. Maximal degree in co-relation 82628. Up to 7498 conditions per place. [2024-06-21 21:58:54,527 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 536 selfloop transitions, 95 changer transitions 0/634 dead transitions. [2024-06-21 21:58:54,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 634 transitions, 12825 flow [2024-06-21 21:58:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:58:54,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-06-21 21:58:54,528 INFO L175 Difference]: Start difference. First operand has 382 places, 601 transitions, 11103 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:58:54,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 634 transitions, 12825 flow [2024-06-21 21:58:59,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 634 transitions, 12236 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:58:59,626 INFO L231 Difference]: Finished difference. Result has 383 places, 607 transitions, 10892 flow [2024-06-21 21:58:59,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10514, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10892, PETRI_PLACES=383, PETRI_TRANSITIONS=607} [2024-06-21 21:58:59,627 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 343 predicate places. [2024-06-21 21:58:59,627 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 607 transitions, 10892 flow [2024-06-21 21:58:59,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:58:59,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:59,627 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 21:58:59,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:58:59,628 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 21:58:59,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2068381146, now seen corresponding path program 2 times [2024-06-21 21:58:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945752544] [2024-06-21 21:58:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:59,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:00,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:00,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945752544] [2024-06-21 21:59:00,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945752544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:00,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:00,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:59:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834894737] [2024-06-21 21:59:00,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:00,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:59:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:59:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:59:00,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:59:00,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 607 transitions, 10892 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:59:00,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:00,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:59:00,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:02,477 INFO L124 PetriNetUnfolderBase]: 5510/8169 cut-off events. [2024-06-21 21:59:02,478 INFO L125 PetriNetUnfolderBase]: For 1211828/1211830 co-relation queries the response was YES. [2024-06-21 21:59:02,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84402 conditions, 8169 events. 5510/8169 cut-off events. For 1211828/1211830 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 45841 event pairs, 1156 based on Foata normal form. 6/8173 useless extension candidates. Maximal degree in co-relation 84221. Up to 7839 conditions per place. [2024-06-21 21:59:02,618 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 570 selfloop transitions, 82 changer transitions 0/655 dead transitions. [2024-06-21 21:59:02,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 655 transitions, 12888 flow [2024-06-21 21:59:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 21:59:02,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:59:02,619 INFO L175 Difference]: Start difference. First operand has 383 places, 607 transitions, 10892 flow. Second operand 9 states and 135 transitions. [2024-06-21 21:59:02,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 655 transitions, 12888 flow [2024-06-21 21:59:08,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 655 transitions, 12580 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:08,018 INFO L231 Difference]: Finished difference. Result has 391 places, 633 transitions, 11464 flow [2024-06-21 21:59:08,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=10654, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11464, PETRI_PLACES=391, PETRI_TRANSITIONS=633} [2024-06-21 21:59:08,019 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 351 predicate places. [2024-06-21 21:59:08,019 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 633 transitions, 11464 flow [2024-06-21 21:59:08,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:59:08,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:08,020 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 21:59:08,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:59:08,020 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 21:59:08,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1304786688, now seen corresponding path program 6 times [2024-06-21 21:59:08,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:08,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329427196] [2024-06-21 21:59:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:08,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329427196] [2024-06-21 21:59:08,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329427196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:08,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:08,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:59:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795535055] [2024-06-21 21:59:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:08,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:59:08,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:59:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:59:08,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:59:08,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 633 transitions, 11464 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:59:08,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:08,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:59:08,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:10,971 INFO L124 PetriNetUnfolderBase]: 5580/8263 cut-off events. [2024-06-21 21:59:10,972 INFO L125 PetriNetUnfolderBase]: For 1259636/1259638 co-relation queries the response was YES. [2024-06-21 21:59:11,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86070 conditions, 8263 events. 5580/8263 cut-off events. For 1259636/1259638 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 46370 event pairs, 902 based on Foata normal form. 6/8267 useless extension candidates. Maximal degree in co-relation 85884. Up to 6610 conditions per place. [2024-06-21 21:59:11,128 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 421 selfloop transitions, 254 changer transitions 0/678 dead transitions. [2024-06-21 21:59:11,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 678 transitions, 13819 flow [2024-06-21 21:59:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:59:11,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472934472934473 [2024-06-21 21:59:11,129 INFO L175 Difference]: Start difference. First operand has 391 places, 633 transitions, 11464 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:59:11,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 678 transitions, 13819 flow [2024-06-21 21:59:18,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 678 transitions, 13706 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:18,483 INFO L231 Difference]: Finished difference. Result has 396 places, 642 transitions, 12087 flow [2024-06-21 21:59:18,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=11351, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12087, PETRI_PLACES=396, PETRI_TRANSITIONS=642} [2024-06-21 21:59:18,483 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 356 predicate places. [2024-06-21 21:59:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 642 transitions, 12087 flow [2024-06-21 21:59:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:59:18,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:18,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:18,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:59:18,484 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 21:59:18,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1304786998, now seen corresponding path program 3 times [2024-06-21 21:59:18,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:18,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868006939] [2024-06-21 21:59:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:18,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:19,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868006939] [2024-06-21 21:59:19,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868006939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:19,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:19,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:59:19,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440405203] [2024-06-21 21:59:19,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:19,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:59:19,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:59:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:59:19,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:59:19,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 642 transitions, 12087 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:59:19,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:19,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:59:19,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:21,447 INFO L124 PetriNetUnfolderBase]: 5620/8319 cut-off events. [2024-06-21 21:59:21,448 INFO L125 PetriNetUnfolderBase]: For 1304893/1304895 co-relation queries the response was YES. [2024-06-21 21:59:21,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87912 conditions, 8319 events. 5620/8319 cut-off events. For 1304893/1304895 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46763 event pairs, 1037 based on Foata normal form. 8/8325 useless extension candidates. Maximal degree in co-relation 87725. Up to 5306 conditions per place. [2024-06-21 21:59:21,602 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 306 selfloop transitions, 376 changer transitions 0/685 dead transitions. [2024-06-21 21:59:21,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 685 transitions, 14589 flow [2024-06-21 21:59:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:59:21,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 21:59:21,603 INFO L175 Difference]: Start difference. First operand has 396 places, 642 transitions, 12087 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:59:21,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 685 transitions, 14589 flow [2024-06-21 21:59:28,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 685 transitions, 14109 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:28,826 INFO L231 Difference]: Finished difference. Result has 401 places, 648 transitions, 12510 flow [2024-06-21 21:59:28,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=11633, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12510, PETRI_PLACES=401, PETRI_TRANSITIONS=648} [2024-06-21 21:59:28,827 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 361 predicate places. [2024-06-21 21:59:28,827 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 648 transitions, 12510 flow [2024-06-21 21:59:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 21:59:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:28,827 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 21:59:28,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:59:28,828 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 21:59:28,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1304797228, now seen corresponding path program 4 times [2024-06-21 21:59:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:28,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870547068] [2024-06-21 21:59:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:28,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:29,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:29,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870547068] [2024-06-21 21:59:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870547068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:29,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032951299] [2024-06-21 21:59:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:29,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:29,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:29,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:59:29,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 648 transitions, 12510 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:59:29,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:29,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:59:29,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:31,661 INFO L124 PetriNetUnfolderBase]: 5600/8291 cut-off events. [2024-06-21 21:59:31,661 INFO L125 PetriNetUnfolderBase]: For 1295482/1295484 co-relation queries the response was YES. [2024-06-21 21:59:31,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88189 conditions, 8291 events. 5600/8291 cut-off events. For 1295482/1295484 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 46546 event pairs, 1025 based on Foata normal form. 4/8293 useless extension candidates. Maximal degree in co-relation 88001. Up to 5294 conditions per place. [2024-06-21 21:59:31,814 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 305 selfloop transitions, 382 changer transitions 0/690 dead transitions. [2024-06-21 21:59:31,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 690 transitions, 14740 flow [2024-06-21 21:59:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:59:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:59:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 21:59:31,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405594405594406 [2024-06-21 21:59:31,815 INFO L175 Difference]: Start difference. First operand has 401 places, 648 transitions, 12510 flow. Second operand 11 states and 189 transitions. [2024-06-21 21:59:31,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 690 transitions, 14740 flow [2024-06-21 21:59:37,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 690 transitions, 14145 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:37,833 INFO L231 Difference]: Finished difference. Result has 407 places, 648 transitions, 12685 flow [2024-06-21 21:59:37,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=11915, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12685, PETRI_PLACES=407, PETRI_TRANSITIONS=648} [2024-06-21 21:59:37,834 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 367 predicate places. [2024-06-21 21:59:37,834 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 648 transitions, 12685 flow [2024-06-21 21:59:37,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:59:37,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:37,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:37,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:59:37,835 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:37,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:37,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1585722944, now seen corresponding path program 3 times [2024-06-21 21:59:37,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:37,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787528130] [2024-06-21 21:59:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:37,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:38,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787528130] [2024-06-21 21:59:38,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787528130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:38,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:38,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:38,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709183591] [2024-06-21 21:59:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:38,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:38,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:59:38,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 648 transitions, 12685 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:59:38,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:38,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:59:38,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:40,744 INFO L124 PetriNetUnfolderBase]: 5616/8314 cut-off events. [2024-06-21 21:59:40,744 INFO L125 PetriNetUnfolderBase]: For 1324711/1324711 co-relation queries the response was YES. [2024-06-21 21:59:40,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88651 conditions, 8314 events. 5616/8314 cut-off events. For 1324711/1324711 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 46723 event pairs, 1357 based on Foata normal form. 4/8316 useless extension candidates. Maximal degree in co-relation 88462. Up to 8169 conditions per place. [2024-06-21 21:59:40,902 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 612 selfloop transitions, 55 changer transitions 0/670 dead transitions. [2024-06-21 21:59:40,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 670 transitions, 14145 flow [2024-06-21 21:59:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-21 21:59:40,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2024-06-21 21:59:40,904 INFO L175 Difference]: Start difference. First operand has 407 places, 648 transitions, 12685 flow. Second operand 9 states and 132 transitions. [2024-06-21 21:59:40,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 670 transitions, 14145 flow [2024-06-21 21:59:48,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 670 transitions, 13573 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:59:48,065 INFO L231 Difference]: Finished difference. Result has 407 places, 651 transitions, 12293 flow [2024-06-21 21:59:48,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12113, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12293, PETRI_PLACES=407, PETRI_TRANSITIONS=651} [2024-06-21 21:59:48,065 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 367 predicate places. [2024-06-21 21:59:48,065 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 651 transitions, 12293 flow [2024-06-21 21:59:48,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:59:48,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:48,066 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 21:59:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:59:48,066 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 21:59:48,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1581997922, now seen corresponding path program 7 times [2024-06-21 21:59:48,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:48,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223093201] [2024-06-21 21:59:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:48,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223093201] [2024-06-21 21:59:48,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223093201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:48,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:48,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:48,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159965516] [2024-06-21 21:59:48,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:48,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:48,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:59:48,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 651 transitions, 12293 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 21:59:48,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:48,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:59:48,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:50,797 INFO L124 PetriNetUnfolderBase]: 5562/8242 cut-off events. [2024-06-21 21:59:50,798 INFO L125 PetriNetUnfolderBase]: For 1325319/1325319 co-relation queries the response was YES. [2024-06-21 21:59:50,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84750 conditions, 8242 events. 5562/8242 cut-off events. For 1325319/1325319 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46298 event pairs, 1186 based on Foata normal form. 18/8258 useless extension candidates. Maximal degree in co-relation 84560. Up to 7592 conditions per place. [2024-06-21 21:59:50,948 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 542 selfloop transitions, 130 changer transitions 0/675 dead transitions. [2024-06-21 21:59:50,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 675 transitions, 13757 flow [2024-06-21 21:59:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 21:59:50,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 21:59:50,950 INFO L175 Difference]: Start difference. First operand has 407 places, 651 transitions, 12293 flow. Second operand 9 states and 144 transitions. [2024-06-21 21:59:50,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 675 transitions, 13757 flow [2024-06-21 21:59:58,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 675 transitions, 13610 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 21:59:58,349 INFO L231 Difference]: Finished difference. Result has 409 places, 651 transitions, 12434 flow [2024-06-21 21:59:58,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12146, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12434, PETRI_PLACES=409, PETRI_TRANSITIONS=651} [2024-06-21 21:59:58,350 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 369 predicate places. [2024-06-21 21:59:58,350 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 651 transitions, 12434 flow [2024-06-21 21:59:58,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 21:59:58,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:58,350 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 21:59:58,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:59:58,350 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 21:59:58,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash 829861204, now seen corresponding path program 8 times [2024-06-21 21:59:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:58,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13865243] [2024-06-21 21:59:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:58,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:58,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13865243] [2024-06-21 21:59:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13865243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:58,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:58,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:58,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160469953] [2024-06-21 21:59:58,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:58,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:58,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:58,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 21:59:58,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 651 transitions, 12434 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 21:59:58,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:58,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 21:59:58,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:00,992 INFO L124 PetriNetUnfolderBase]: 5484/8134 cut-off events. [2024-06-21 22:00:00,992 INFO L125 PetriNetUnfolderBase]: For 1261792/1261792 co-relation queries the response was YES. [2024-06-21 22:00:01,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82656 conditions, 8134 events. 5484/8134 cut-off events. For 1261792/1261792 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 45672 event pairs, 1185 based on Foata normal form. 18/8150 useless extension candidates. Maximal degree in co-relation 82465. Up to 7265 conditions per place. [2024-06-21 22:00:01,150 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 524 selfloop transitions, 148 changer transitions 0/675 dead transitions. [2024-06-21 22:00:01,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 675 transitions, 13898 flow [2024-06-21 22:00:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 22:00:01,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2024-06-21 22:00:01,151 INFO L175 Difference]: Start difference. First operand has 409 places, 651 transitions, 12434 flow. Second operand 9 states and 145 transitions. [2024-06-21 22:00:01,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 675 transitions, 13898 flow [2024-06-21 22:00:07,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 675 transitions, 13598 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:07,062 INFO L231 Difference]: Finished difference. Result has 411 places, 651 transitions, 12450 flow [2024-06-21 22:00:07,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12134, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12450, PETRI_PLACES=411, PETRI_TRANSITIONS=651} [2024-06-21 22:00:07,063 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 371 predicate places. [2024-06-21 22:00:07,063 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 651 transitions, 12450 flow [2024-06-21 22:00:07,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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 22:00:07,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:07,063 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 22:00:07,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 22:00:07,064 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 22:00:07,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1176691630, now seen corresponding path program 1 times [2024-06-21 22:00:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:07,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691692774] [2024-06-21 22:00:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:07,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:07,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:07,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691692774] [2024-06-21 22:00:07,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691692774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:07,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:07,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:07,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715759090] [2024-06-21 22:00:07,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:07,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:07,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:07,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:07,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:07,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:00:07,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 651 transitions, 12450 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:07,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:07,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:00:07,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:10,295 INFO L124 PetriNetUnfolderBase]: 6252/9359 cut-off events. [2024-06-21 22:00:10,295 INFO L125 PetriNetUnfolderBase]: For 2023205/2023207 co-relation queries the response was YES. [2024-06-21 22:00:10,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100232 conditions, 9359 events. 6252/9359 cut-off events. For 2023205/2023207 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 53890 event pairs, 1174 based on Foata normal form. 56/9413 useless extension candidates. Maximal degree in co-relation 100040. Up to 3195 conditions per place. [2024-06-21 22:00:10,469 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 307 selfloop transitions, 400 changer transitions 8/718 dead transitions. [2024-06-21 22:00:10,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 718 transitions, 15304 flow [2024-06-21 22:00:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 22:00:10,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 22:00:10,470 INFO L175 Difference]: Start difference. First operand has 411 places, 651 transitions, 12450 flow. Second operand 9 states and 180 transitions. [2024-06-21 22:00:10,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 718 transitions, 15304 flow [2024-06-21 22:00:17,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 718 transitions, 15026 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:17,950 INFO L231 Difference]: Finished difference. Result has 414 places, 651 transitions, 13019 flow [2024-06-21 22:00:17,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12172, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13019, PETRI_PLACES=414, PETRI_TRANSITIONS=651} [2024-06-21 22:00:17,950 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 374 predicate places. [2024-06-21 22:00:17,950 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 651 transitions, 13019 flow [2024-06-21 22:00:17,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:17,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:17,951 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 22:00:17,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 22:00:17,951 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 22:00:17,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1183178380, now seen corresponding path program 2 times [2024-06-21 22:00:17,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:17,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030078640] [2024-06-21 22:00:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:18,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030078640] [2024-06-21 22:00:18,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030078640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:18,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:18,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:18,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998086846] [2024-06-21 22:00:18,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:18,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:18,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:18,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:00:18,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 651 transitions, 13019 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:18,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:18,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:00:18,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:21,585 INFO L124 PetriNetUnfolderBase]: 7135/10754 cut-off events. [2024-06-21 22:00:21,586 INFO L125 PetriNetUnfolderBase]: For 2811715/2811717 co-relation queries the response was YES. [2024-06-21 22:00:21,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124251 conditions, 10754 events. 7135/10754 cut-off events. For 2811715/2811717 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 63970 event pairs, 1762 based on Foata normal form. 56/10808 useless extension candidates. Maximal degree in co-relation 124057. Up to 6110 conditions per place. [2024-06-21 22:00:21,799 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 307 selfloop transitions, 394 changer transitions 5/709 dead transitions. [2024-06-21 22:00:21,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 709 transitions, 15809 flow [2024-06-21 22:00:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 22:00:21,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928774928774929 [2024-06-21 22:00:21,801 INFO L175 Difference]: Start difference. First operand has 414 places, 651 transitions, 13019 flow. Second operand 9 states and 173 transitions. [2024-06-21 22:00:21,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 709 transitions, 15809 flow [2024-06-21 22:00:32,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 709 transitions, 15254 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 22:00:32,800 INFO L231 Difference]: Finished difference. Result has 420 places, 653 transitions, 13417 flow [2024-06-21 22:00:32,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12464, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13417, PETRI_PLACES=420, PETRI_TRANSITIONS=653} [2024-06-21 22:00:32,801 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 380 predicate places. [2024-06-21 22:00:32,801 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 653 transitions, 13417 flow [2024-06-21 22:00:32,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:32,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:32,801 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 22:00:32,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 22:00:32,802 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 22:00:32,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1183186750, now seen corresponding path program 3 times [2024-06-21 22:00:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:32,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256492226] [2024-06-21 22:00:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:32,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:33,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256492226] [2024-06-21 22:00:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256492226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:33,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:33,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744393207] [2024-06-21 22:00:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:33,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:33,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:33,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:33,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:33,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:00:33,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 653 transitions, 13417 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:33,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:33,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:00:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:36,957 INFO L124 PetriNetUnfolderBase]: 7224/10937 cut-off events. [2024-06-21 22:00:36,957 INFO L125 PetriNetUnfolderBase]: For 2785037/2785039 co-relation queries the response was YES. [2024-06-21 22:00:37,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124325 conditions, 10937 events. 7224/10937 cut-off events. For 2785037/2785039 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 65664 event pairs, 1950 based on Foata normal form. 68/11003 useless extension candidates. Maximal degree in co-relation 124128. Up to 7596 conditions per place. [2024-06-21 22:00:37,236 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 302 selfloop transitions, 391 changer transitions 3/699 dead transitions. [2024-06-21 22:00:37,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 699 transitions, 15780 flow [2024-06-21 22:00:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 22:00:37,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2024-06-21 22:00:37,237 INFO L175 Difference]: Start difference. First operand has 420 places, 653 transitions, 13417 flow. Second operand 9 states and 168 transitions. [2024-06-21 22:00:37,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 699 transitions, 15780 flow [2024-06-21 22:00:48,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 699 transitions, 15221 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:48,133 INFO L231 Difference]: Finished difference. Result has 424 places, 652 transitions, 13664 flow [2024-06-21 22:00:48,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12858, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13664, PETRI_PLACES=424, PETRI_TRANSITIONS=652} [2024-06-21 22:00:48,133 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 384 predicate places. [2024-06-21 22:00:48,133 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 652 transitions, 13664 flow [2024-06-21 22:00:48,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:48,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:48,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:48,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 22:00:48,134 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 22:00:48,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1413163660, now seen corresponding path program 4 times [2024-06-21 22:00:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:48,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824143432] [2024-06-21 22:00:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:48,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824143432] [2024-06-21 22:00:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824143432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:48,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:48,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084754951] [2024-06-21 22:00:48,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:48,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:48,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:48,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:00:48,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 652 transitions, 13664 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:48,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:48,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:00:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:52,264 INFO L124 PetriNetUnfolderBase]: 7128/10814 cut-off events. [2024-06-21 22:00:52,264 INFO L125 PetriNetUnfolderBase]: For 2452328/2452330 co-relation queries the response was YES. [2024-06-21 22:00:52,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118701 conditions, 10814 events. 7128/10814 cut-off events. For 2452328/2452330 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65093 event pairs, 1812 based on Foata normal form. 63/10875 useless extension candidates. Maximal degree in co-relation 118502. Up to 8703 conditions per place. [2024-06-21 22:00:52,559 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 409 selfloop transitions, 282 changer transitions 2/696 dead transitions. [2024-06-21 22:00:52,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 696 transitions, 15958 flow [2024-06-21 22:00:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 22:00:52,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47293447293447294 [2024-06-21 22:00:52,569 INFO L175 Difference]: Start difference. First operand has 424 places, 652 transitions, 13664 flow. Second operand 9 states and 166 transitions. [2024-06-21 22:00:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 696 transitions, 15958 flow [2024-06-21 22:01:02,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 696 transitions, 15109 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 22:01:02,172 INFO L231 Difference]: Finished difference. Result has 425 places, 652 transitions, 13413 flow [2024-06-21 22:01:02,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12821, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13413, PETRI_PLACES=425, PETRI_TRANSITIONS=652} [2024-06-21 22:01:02,172 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 385 predicate places. [2024-06-21 22:01:02,172 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 652 transitions, 13413 flow [2024-06-21 22:01:02,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:02,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:02,173 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 22:01:02,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 22:01:02,173 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 22:01:02,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1592390548, now seen corresponding path program 1 times [2024-06-21 22:01:02,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:02,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645988620] [2024-06-21 22:01:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:02,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:02,959 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 22:01:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645988620] [2024-06-21 22:01:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645988620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:01:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009159345] [2024-06-21 22:01:02,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:01:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:01:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:01:03,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:01:03,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 652 transitions, 13413 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:03,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:03,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:01:03,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:06,861 INFO L124 PetriNetUnfolderBase]: 7180/10893 cut-off events. [2024-06-21 22:01:06,861 INFO L125 PetriNetUnfolderBase]: For 2238170/2238170 co-relation queries the response was YES. [2024-06-21 22:01:06,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118604 conditions, 10893 events. 7180/10893 cut-off events. For 2238170/2238170 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 65782 event pairs, 2234 based on Foata normal form. 14/10905 useless extension candidates. Maximal degree in co-relation 118405. Up to 9772 conditions per place. [2024-06-21 22:01:07,043 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 498 selfloop transitions, 185 changer transitions 0/686 dead transitions. [2024-06-21 22:01:07,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 686 transitions, 15025 flow [2024-06-21 22:01:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:01:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:01:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-21 22:01:07,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2024-06-21 22:01:07,044 INFO L175 Difference]: Start difference. First operand has 425 places, 652 transitions, 13413 flow. Second operand 11 states and 173 transitions. [2024-06-21 22:01:07,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 686 transitions, 15025 flow [2024-06-21 22:01:15,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 686 transitions, 14401 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 22:01:15,873 INFO L231 Difference]: Finished difference. Result has 428 places, 654 transitions, 13243 flow [2024-06-21 22:01:15,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12789, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13243, PETRI_PLACES=428, PETRI_TRANSITIONS=654} [2024-06-21 22:01:15,874 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 388 predicate places. [2024-06-21 22:01:15,874 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 654 transitions, 13243 flow [2024-06-21 22:01:15,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:15,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:15,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:15,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 22:01:15,875 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 22:01:15,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1582202646, now seen corresponding path program 5 times [2024-06-21 22:01:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:15,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433932720] [2024-06-21 22:01:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:15,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:16,796 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 22:01:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:16,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433932720] [2024-06-21 22:01:16,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433932720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:16,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:16,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:01:16,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187739313] [2024-06-21 22:01:16,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:16,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:01:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:01:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:01:16,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:01:16,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 654 transitions, 13243 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 22:01:16,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:16,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:01:16,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:20,789 INFO L124 PetriNetUnfolderBase]: 7674/11667 cut-off events. [2024-06-21 22:01:20,789 INFO L125 PetriNetUnfolderBase]: For 2835209/2835209 co-relation queries the response was YES. [2024-06-21 22:01:20,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123220 conditions, 11667 events. 7674/11667 cut-off events. For 2835209/2835209 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 71378 event pairs, 2376 based on Foata normal form. 122/11787 useless extension candidates. Maximal degree in co-relation 123020. Up to 9826 conditions per place. [2024-06-21 22:01:20,983 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 506 selfloop transitions, 189 changer transitions 7/705 dead transitions. [2024-06-21 22:01:20,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 705 transitions, 15324 flow [2024-06-21 22:01:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:01:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:01:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 22:01:20,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172494172494173 [2024-06-21 22:01:20,985 INFO L175 Difference]: Start difference. First operand has 428 places, 654 transitions, 13243 flow. Second operand 11 states and 179 transitions. [2024-06-21 22:01:20,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 705 transitions, 15324 flow [2024-06-21 22:01:31,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 705 transitions, 14894 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 22:01:31,514 INFO L231 Difference]: Finished difference. Result has 430 places, 663 transitions, 13537 flow [2024-06-21 22:01:31,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12831, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13537, PETRI_PLACES=430, PETRI_TRANSITIONS=663} [2024-06-21 22:01:31,515 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 390 predicate places. [2024-06-21 22:01:31,515 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 663 transitions, 13537 flow [2024-06-21 22:01:31,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 22:01:31,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:31,515 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 22:01:31,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 22:01:31,515 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 22:01:31,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1592402638, now seen corresponding path program 2 times [2024-06-21 22:01:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851307414] [2024-06-21 22:01:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:31,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:32,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:32,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851307414] [2024-06-21 22:01:32,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851307414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:32,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:32,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:01:32,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389316433] [2024-06-21 22:01:32,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:32,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:01:32,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:01:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:01:32,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:01:32,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 663 transitions, 13537 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:32,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:32,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:01:32,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:36,576 INFO L124 PetriNetUnfolderBase]: 8062/12283 cut-off events. [2024-06-21 22:01:36,576 INFO L125 PetriNetUnfolderBase]: For 2665981/2665981 co-relation queries the response was YES. [2024-06-21 22:01:36,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134306 conditions, 12283 events. 8062/12283 cut-off events. For 2665981/2665981 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 76248 event pairs, 2562 based on Foata normal form. 14/12295 useless extension candidates. Maximal degree in co-relation 134105. Up to 9880 conditions per place. [2024-06-21 22:01:36,773 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 519 selfloop transitions, 184 changer transitions 0/706 dead transitions. [2024-06-21 22:01:36,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 706 transitions, 15509 flow [2024-06-21 22:01:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:01:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:01:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 22:01:36,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172494172494173 [2024-06-21 22:01:36,775 INFO L175 Difference]: Start difference. First operand has 430 places, 663 transitions, 13537 flow. Second operand 11 states and 179 transitions. [2024-06-21 22:01:36,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 706 transitions, 15509 flow [2024-06-21 22:01:49,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 706 transitions, 15141 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:49,812 INFO L231 Difference]: Finished difference. Result has 435 places, 667 transitions, 13738 flow [2024-06-21 22:01:49,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=13169, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13738, PETRI_PLACES=435, PETRI_TRANSITIONS=667} [2024-06-21 22:01:49,813 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 395 predicate places. [2024-06-21 22:01:49,813 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 667 transitions, 13738 flow [2024-06-21 22:01:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:49,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:49,813 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 22:01:49,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 22:01:49,813 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 22:01:49,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1581905976, now seen corresponding path program 6 times [2024-06-21 22:01:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:49,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157146025] [2024-06-21 22:01:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:49,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157146025] [2024-06-21 22:01:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157146025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:50,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:50,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054597108] [2024-06-21 22:01:50,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:50,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:50,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:50,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:01:50,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 667 transitions, 13738 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:50,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:50,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:01:50,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:55,028 INFO L124 PetriNetUnfolderBase]: 8746/13367 cut-off events. [2024-06-21 22:01:55,029 INFO L125 PetriNetUnfolderBase]: For 3523637/3523637 co-relation queries the response was YES. [2024-06-21 22:01:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150383 conditions, 13367 events. 8746/13367 cut-off events. For 3523637/3523637 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 84316 event pairs, 2866 based on Foata normal form. 56/13421 useless extension candidates. Maximal degree in co-relation 150180. Up to 10240 conditions per place. [2024-06-21 22:01:55,286 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 518 selfloop transitions, 184 changer transitions 7/712 dead transitions. [2024-06-21 22:01:55,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 712 transitions, 15803 flow [2024-06-21 22:01:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:01:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:01:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 22:01:55,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 22:01:55,287 INFO L175 Difference]: Start difference. First operand has 435 places, 667 transitions, 13738 flow. Second operand 10 states and 170 transitions. [2024-06-21 22:01:55,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 712 transitions, 15803 flow [2024-06-21 22:02:07,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 712 transitions, 15509 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 22:02:07,395 INFO L231 Difference]: Finished difference. Result has 439 places, 668 transitions, 13930 flow [2024-06-21 22:02:07,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=13444, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13930, PETRI_PLACES=439, PETRI_TRANSITIONS=668} [2024-06-21 22:02:07,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 399 predicate places. [2024-06-21 22:02:07,396 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 668 transitions, 13930 flow [2024-06-21 22:02:07,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:07,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:07,396 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 22:02:07,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 22:02:07,396 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 22:02:07,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1592033676, now seen corresponding path program 7 times [2024-06-21 22:02:07,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:07,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583455279] [2024-06-21 22:02:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:07,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:08,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583455279] [2024-06-21 22:02:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583455279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:08,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:02:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600044932] [2024-06-21 22:02:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:08,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:02:08,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:02:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:02:08,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:02:08,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 668 transitions, 13930 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 22:02:08,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:08,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:02:08,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:12,931 INFO L124 PetriNetUnfolderBase]: 8617/13180 cut-off events. [2024-06-21 22:02:12,931 INFO L125 PetriNetUnfolderBase]: For 3257061/3257061 co-relation queries the response was YES. [2024-06-21 22:02:13,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144296 conditions, 13180 events. 8617/13180 cut-off events. For 3257061/3257061 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 83282 event pairs, 2995 based on Foata normal form. 54/13232 useless extension candidates. Maximal degree in co-relation 144090. Up to 11669 conditions per place. [2024-06-21 22:02:13,176 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 512 selfloop transitions, 186 changer transitions 4/705 dead transitions. [2024-06-21 22:02:13,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 705 transitions, 15544 flow [2024-06-21 22:02:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:02:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:02:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-21 22:02:13,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 22:02:13,177 INFO L175 Difference]: Start difference. First operand has 439 places, 668 transitions, 13930 flow. Second operand 12 states and 189 transitions. [2024-06-21 22:02:13,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 705 transitions, 15544 flow [2024-06-21 22:02:24,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 705 transitions, 15257 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:24,331 INFO L231 Difference]: Finished difference. Result has 445 places, 665 transitions, 13932 flow [2024-06-21 22:02:24,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=13643, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13932, PETRI_PLACES=445, PETRI_TRANSITIONS=665} [2024-06-21 22:02:24,332 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 405 predicate places. [2024-06-21 22:02:24,332 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 665 transitions, 13932 flow [2024-06-21 22:02:24,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 22:02:24,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:24,333 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 22:02:24,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 22:02:24,333 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 22:02:24,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:24,333 INFO L85 PathProgramCache]: Analyzing trace with hash -287758784, now seen corresponding path program 4 times [2024-06-21 22:02:24,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:24,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295071222] [2024-06-21 22:02:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:24,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:25,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295071222] [2024-06-21 22:02:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295071222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:25,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:25,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740280897] [2024-06-21 22:02:25,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:25,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:25,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:25,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:02:25,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 665 transitions, 13932 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 22:02:25,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:25,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:02:25,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:29,542 INFO L124 PetriNetUnfolderBase]: 8610/13175 cut-off events. [2024-06-21 22:02:29,542 INFO L125 PetriNetUnfolderBase]: For 3009855/3009855 co-relation queries the response was YES. [2024-06-21 22:02:29,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145472 conditions, 13175 events. 8610/13175 cut-off events. For 3009855/3009855 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 83551 event pairs, 3486 based on Foata normal form. 2/13175 useless extension candidates. Maximal degree in co-relation 145264. Up to 13061 conditions per place. [2024-06-21 22:02:29,811 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 656 selfloop transitions, 33 changer transitions 0/692 dead transitions. [2024-06-21 22:02:29,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 692 transitions, 15746 flow [2024-06-21 22:02:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 22:02:29,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2024-06-21 22:02:29,813 INFO L175 Difference]: Start difference. First operand has 445 places, 665 transitions, 13932 flow. Second operand 8 states and 123 transitions. [2024-06-21 22:02:29,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 692 transitions, 15746 flow [2024-06-21 22:02:39,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 692 transitions, 15283 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 22:02:39,341 INFO L231 Difference]: Finished difference. Result has 442 places, 669 transitions, 13688 flow [2024-06-21 22:02:39,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=13469, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13688, PETRI_PLACES=442, PETRI_TRANSITIONS=669} [2024-06-21 22:02:39,342 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 402 predicate places. [2024-06-21 22:02:39,342 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 669 transitions, 13688 flow [2024-06-21 22:02:39,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 22:02:39,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:39,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:39,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 22:02:39,343 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 22:02:39,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -285017144, now seen corresponding path program 5 times [2024-06-21 22:02:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:39,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299202959] [2024-06-21 22:02:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:40,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:40,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299202959] [2024-06-21 22:02:40,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299202959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:40,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:40,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:02:40,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244070518] [2024-06-21 22:02:40,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:40,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:02:40,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:40,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:02:40,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:02:40,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-06-21 22:02:40,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 669 transitions, 13688 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 22:02:40,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:40,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-06-21 22:02:40,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:45,167 INFO L124 PetriNetUnfolderBase]: 8618/13187 cut-off events. [2024-06-21 22:02:45,168 INFO L125 PetriNetUnfolderBase]: For 3058505/3058505 co-relation queries the response was YES. [2024-06-21 22:02:45,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145012 conditions, 13187 events. 8618/13187 cut-off events. For 3058505/3058505 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 83597 event pairs, 3482 based on Foata normal form. 2/13187 useless extension candidates. Maximal degree in co-relation 144803. Up to 13106 conditions per place. [2024-06-21 22:02:45,460 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 657 selfloop transitions, 30 changer transitions 0/690 dead transitions. [2024-06-21 22:02:45,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 690 transitions, 15210 flow [2024-06-21 22:02:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 22:02:45,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814102564102564 [2024-06-21 22:02:45,461 INFO L175 Difference]: Start difference. First operand has 442 places, 669 transitions, 13688 flow. Second operand 8 states and 119 transitions. [2024-06-21 22:02:45,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 690 transitions, 15210 flow