./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:34:32,900 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:34:32,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:34:32,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:34:32,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:34:32,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:34:32,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:34:32,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:34:32,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:34:32,950 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:34:32,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:34:32,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:34:32,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:34:32,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:34:32,951 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:34:32,951 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:34:32,952 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:34:32,952 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:34:32,952 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:34:32,952 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:34:32,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:34:32,953 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:34:32,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:34:32,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:34:32,954 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:34:32,954 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:34:32,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:34:32,955 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:34:32,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:34:32,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:34:32,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:34:32,956 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:34:32,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:34:32,956 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:34:32,956 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:34:32,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:34:32,957 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:34:32,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:34:32,957 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:34:32,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:34:32,958 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:34:32,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:34:32,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:34:32,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:34:33,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:34:33,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:34:33,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:34:33,167 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:34:33,167 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:34:33,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:34:34,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:34:34,449 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:34:34,450 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:34:34,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c5497c4/db7436e828cd476ca085f5bc8667b9b4/FLAG7f54fbf51 [2024-06-21 20:34:34,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c5497c4/db7436e828cd476ca085f5bc8667b9b4 [2024-06-21 20:34:34,480 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:34:34,481 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:34:34,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 20:34:34,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:34:34,627 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:34:34,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:34:34,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:34:34,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:34:34,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:34:34" (1/2) ... [2024-06-21 20:34:34,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7845cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:34:34, skipping insertion in model container [2024-06-21 20:34:34,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:34:34" (1/2) ... [2024-06-21 20:34:34,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4aa1cc48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:34:34, skipping insertion in model container [2024-06-21 20:34:34,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:34:34" (2/2) ... [2024-06-21 20:34:34,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7845cd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:34:34, skipping insertion in model container [2024-06-21 20:34:34,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:34:34" (2/2) ... [2024-06-21 20:34:34,638 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:34:34,748 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:34:34,749 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-21 20:34:34,749 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-21 20:34:34,749 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-21 20:34:34,750 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:34:34,750 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-21 20:34:34,786 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:34:35,091 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:34:35,102 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:34:35,235 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:34:35,273 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:34:35,273 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:34:35 WrapperNode [2024-06-21 20:34:35,273 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:34:35,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:34:35,275 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:34:35,275 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:34:35,281 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,309 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,336 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-21 20:34:35,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:34:35,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:34:35,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:34:35,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:34:35,347 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,347 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,350 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,363 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 20:34:35,363 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,364 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,377 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,379 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,381 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,382 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:34:35,386 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:34:35,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:34:35,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:34:35,386 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 08:34:35" (1/1) ... [2024-06-21 20:34:35,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:34:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:34:35,453 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 20:34:35,456 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 20:34:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:34:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:34:35,483 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:34:35,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:34:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:34:35,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:34:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:34:35,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:34:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:34:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:34:35,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:34:35,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:34:35,486 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 20:34:35,576 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:34:35,578 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:34:35,820 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:34:35,820 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:34:35,987 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:34:35,987 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:34:35,988 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:34:35 BoogieIcfgContainer [2024-06-21 20:34:35,988 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:34:35,991 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:34:35,991 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:34:35,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:34:35,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:34:34" (1/4) ... [2024-06-21 20:34:35,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3941ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:34:35, skipping insertion in model container [2024-06-21 20:34:35,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:34:34" (2/4) ... [2024-06-21 20:34:35,996 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3941ca7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:34:35, skipping insertion in model container [2024-06-21 20:34:35,996 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 08:34:35" (3/4) ... [2024-06-21 20:34:35,996 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3941ca7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:34:35, skipping insertion in model container [2024-06-21 20:34:35,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:34:35" (4/4) ... [2024-06-21 20:34:35,998 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:34:36,012 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:34:36,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:34:36,013 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:34:36,065 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:34:36,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 20:34:36,106 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 20:34:36,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:34:36,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:34:36,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 20:34:36,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 20:34:36,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:34:36,121 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;@2c9e9448, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:34:36,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:34:36,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:34:36,124 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 20:34:36,124 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:34:36,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:36,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:34:36,125 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 20:34:36,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash 377005305, now seen corresponding path program 1 times [2024-06-21 20:34:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884360652] [2024-06-21 20:34:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:36,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:36,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884360652] [2024-06-21 20:34:36,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884360652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:36,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:36,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:34:36,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369354926] [2024-06-21 20:34:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:36,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:34:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:34:36,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:34:37,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 20:34:37,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:37,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:37,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 20:34:37,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:37,340 INFO L124 PetriNetUnfolderBase]: 1363/2135 cut-off events. [2024-06-21 20:34:37,340 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 20:34:37,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 2135 events. 1363/2135 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10695 event pairs, 964 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4247. Up to 2037 conditions per place. [2024-06-21 20:34:37,358 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 20:34:37,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-21 20:34:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:34:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:34:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-21 20:34:37,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:34:37,370 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 78 transitions. [2024-06-21 20:34:37,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-21 20:34:37,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:34:37,375 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 20:34:37,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 20:34:37,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 20:34:37,381 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 20:34:37,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:37,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:37,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:37,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:34:37,382 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 20:34:37,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958002, now seen corresponding path program 1 times [2024-06-21 20:34:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:37,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126484589] [2024-06-21 20:34:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:37,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126484589] [2024-06-21 20:34:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126484589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:37,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:34:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41686304] [2024-06-21 20:34:37,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:37,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:34:37,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:37,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:34:37,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:34:38,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 20:34:38,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:38,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:38,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 20:34:38,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:38,244 INFO L124 PetriNetUnfolderBase]: 1357/2136 cut-off events. [2024-06-21 20:34:38,245 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2024-06-21 20:34:38,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4803 conditions, 2136 events. 1357/2136 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10701 event pairs, 840 based on Foata normal form. 3/2115 useless extension candidates. Maximal degree in co-relation 4791. Up to 2013 conditions per place. [2024-06-21 20:34:38,253 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 20:34:38,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-21 20:34:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:34:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:34:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 20:34:38,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 20:34:38,255 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-21 20:34:38,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-21 20:34:38,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:34:38,257 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 20:34:38,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 20:34:38,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 20:34:38,258 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 20:34:38,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:38,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:38,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:38,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:34:38,258 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 20:34:38,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:38,259 INFO L85 PathProgramCache]: Analyzing trace with hash 29058688, now seen corresponding path program 1 times [2024-06-21 20:34:38,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:38,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369214674] [2024-06-21 20:34:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:38,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:38,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:38,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369214674] [2024-06-21 20:34:38,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369214674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:38,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:38,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:34:38,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025704582] [2024-06-21 20:34:38,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:38,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:34:38,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:34:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:34:38,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:34:38,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:38,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:38,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:34:38,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:39,103 INFO L124 PetriNetUnfolderBase]: 1661/2580 cut-off events. [2024-06-21 20:34:39,104 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2024-06-21 20:34:39,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6406 conditions, 2580 events. 1661/2580 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12701 event pairs, 812 based on Foata normal form. 5/2585 useless extension candidates. Maximal degree in co-relation 6392. Up to 2387 conditions per place. [2024-06-21 20:34:39,117 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 20:34:39,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 396 flow [2024-06-21 20:34:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:34:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:34:39,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 20:34:39,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-21 20:34:39,119 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 128 transitions. [2024-06-21 20:34:39,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 396 flow [2024-06-21 20:34:39,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:34:39,121 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 20:34:39,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 20:34:39,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 20:34:39,122 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 20:34:39,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:39,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:39,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:34:39,123 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 20:34:39,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 817703351, now seen corresponding path program 1 times [2024-06-21 20:34:39,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:39,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710615462] [2024-06-21 20:34:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:39,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:39,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710615462] [2024-06-21 20:34:39,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710615462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:39,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:39,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:34:39,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377095933] [2024-06-21 20:34:39,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:39,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:34:39,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:39,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:34:39,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:34:39,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:34:39,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:39,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:39,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:34:39,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:40,257 INFO L124 PetriNetUnfolderBase]: 1669/2592 cut-off events. [2024-06-21 20:34:40,257 INFO L125 PetriNetUnfolderBase]: For 3080/3082 co-relation queries the response was YES. [2024-06-21 20:34:40,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7525 conditions, 2592 events. 1669/2592 cut-off events. For 3080/3082 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12792 event pairs, 666 based on Foata normal form. 7/2599 useless extension candidates. Maximal degree in co-relation 7508. Up to 2373 conditions per place. [2024-06-21 20:34:40,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 60 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-21 20:34:40,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 523 flow [2024-06-21 20:34:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:34:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:34:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:34:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-21 20:34:40,274 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:34:40,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 523 flow [2024-06-21 20:34:40,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 515 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 20:34:40,278 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 310 flow [2024-06-21 20:34:40,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-21 20:34:40,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 20:34:40,279 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 310 flow [2024-06-21 20:34:40,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:40,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:40,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:40,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:34:40,280 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 20:34:40,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2139342657, now seen corresponding path program 1 times [2024-06-21 20:34:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949089521] [2024-06-21 20:34:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949089521] [2024-06-21 20:34:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949089521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:41,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:41,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:34:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656765601] [2024-06-21 20:34:41,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:41,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:34:41,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:34:41,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:34:41,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:34:41,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:41,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:41,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:34:41,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:41,662 INFO L124 PetriNetUnfolderBase]: 1681/2612 cut-off events. [2024-06-21 20:34:41,662 INFO L125 PetriNetUnfolderBase]: For 4855/4857 co-relation queries the response was YES. [2024-06-21 20:34:41,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8396 conditions, 2612 events. 1681/2612 cut-off events. For 4855/4857 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12888 event pairs, 502 based on Foata normal form. 12/2624 useless extension candidates. Maximal degree in co-relation 8376. Up to 2341 conditions per place. [2024-06-21 20:34:41,677 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-21 20:34:41,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 624 flow [2024-06-21 20:34:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:34:41,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-21 20:34:41,680 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 310 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:34:41,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 624 flow [2024-06-21 20:34:41,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 575 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:41,689 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 337 flow [2024-06-21 20:34:41,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-21 20:34:41,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 20:34:41,692 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 337 flow [2024-06-21 20:34:41,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:41,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:41,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:41,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:34:41,697 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 20:34:41,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -799520460, now seen corresponding path program 1 times [2024-06-21 20:34:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:41,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203644149] [2024-06-21 20:34:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:41,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203644149] [2024-06-21 20:34:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203644149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:42,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:42,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:34:42,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540414725] [2024-06-21 20:34:42,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:42,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:34:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:34:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:34:42,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:42,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:42,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:42,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:42,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:42,686 INFO L124 PetriNetUnfolderBase]: 1676/2600 cut-off events. [2024-06-21 20:34:42,686 INFO L125 PetriNetUnfolderBase]: For 6554/6554 co-relation queries the response was YES. [2024-06-21 20:34:42,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 2600 events. 1676/2600 cut-off events. For 6554/6554 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12779 event pairs, 659 based on Foata normal form. 2/2602 useless extension candidates. Maximal degree in co-relation 8896. Up to 2484 conditions per place. [2024-06-21 20:34:42,712 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 54 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-21 20:34:42,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 489 flow [2024-06-21 20:34:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:34:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:34:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 20:34:42,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 20:34:42,714 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 337 flow. Second operand 5 states and 96 transitions. [2024-06-21 20:34:42,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 489 flow [2024-06-21 20:34:42,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 425 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:42,721 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 297 flow [2024-06-21 20:34:42,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-21 20:34:42,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 20:34:42,724 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 297 flow [2024-06-21 20:34:42,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:42,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:42,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:34:42,724 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 20:34:42,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash 956042634, now seen corresponding path program 1 times [2024-06-21 20:34:42,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439654761] [2024-06-21 20:34:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:43,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:43,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439654761] [2024-06-21 20:34:43,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439654761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:43,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:43,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:34:43,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712123769] [2024-06-21 20:34:43,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:43,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:34:43,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:34:43,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:34:43,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:43,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:43,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:43,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:43,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:43,882 INFO L124 PetriNetUnfolderBase]: 1666/2623 cut-off events. [2024-06-21 20:34:43,882 INFO L125 PetriNetUnfolderBase]: For 7722/7722 co-relation queries the response was YES. [2024-06-21 20:34:43,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 2623 events. 1666/2623 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13058 event pairs, 623 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 8881. Up to 2452 conditions per place. [2024-06-21 20:34:43,896 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 20:34:43,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 497 flow [2024-06-21 20:34:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:34:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:34:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 20:34:43,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:34:43,897 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 297 flow. Second operand 6 states and 114 transitions. [2024-06-21 20:34:43,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 497 flow [2024-06-21 20:34:43,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:43,902 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 331 flow [2024-06-21 20:34:43,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-21 20:34:43,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 20:34:43,903 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 331 flow [2024-06-21 20:34:43,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:43,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:43,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:43,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:34:43,904 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 20:34:43,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -433169935, now seen corresponding path program 1 times [2024-06-21 20:34:43,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:43,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523098833] [2024-06-21 20:34:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:43,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523098833] [2024-06-21 20:34:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523098833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:44,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:44,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:34:44,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360912253] [2024-06-21 20:34:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:44,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:34:44,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:34:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:34:44,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:44,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:44,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:44,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:44,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:44,960 INFO L124 PetriNetUnfolderBase]: 1672/2628 cut-off events. [2024-06-21 20:34:44,960 INFO L125 PetriNetUnfolderBase]: For 9597/9601 co-relation queries the response was YES. [2024-06-21 20:34:44,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9502 conditions, 2628 events. 1672/2628 cut-off events. For 9597/9601 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13108 event pairs, 636 based on Foata normal form. 8/2636 useless extension candidates. Maximal degree in co-relation 9478. Up to 2404 conditions per place. [2024-06-21 20:34:44,973 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-21 20:34:44,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 585 flow [2024-06-21 20:34:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:34:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:34:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 20:34:44,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 20:34:44,977 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 331 flow. Second operand 6 states and 122 transitions. [2024-06-21 20:34:44,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 585 flow [2024-06-21 20:34:44,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 553 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:44,983 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 371 flow [2024-06-21 20:34:44,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 20:34:44,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 20:34:44,984 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 371 flow [2024-06-21 20:34:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:44,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:44,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:44,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:34:44,985 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 20:34:44,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1614720727, now seen corresponding path program 2 times [2024-06-21 20:34:44,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:44,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440164235] [2024-06-21 20:34:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:45,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:45,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440164235] [2024-06-21 20:34:45,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440164235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:45,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:45,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:34:45,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695006516] [2024-06-21 20:34:45,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:45,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:34:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:34:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:34:45,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:45,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 371 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:45,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:45,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:45,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:46,041 INFO L124 PetriNetUnfolderBase]: 1657/2602 cut-off events. [2024-06-21 20:34:46,041 INFO L125 PetriNetUnfolderBase]: For 11066/11066 co-relation queries the response was YES. [2024-06-21 20:34:46,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9664 conditions, 2602 events. 1657/2602 cut-off events. For 11066/11066 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12911 event pairs, 632 based on Foata normal form. 2/2604 useless extension candidates. Maximal degree in co-relation 9639. Up to 2445 conditions per place. [2024-06-21 20:34:46,060 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-21 20:34:46,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 553 flow [2024-06-21 20:34:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:34:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:34:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 20:34:46,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 20:34:46,062 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 371 flow. Second operand 6 states and 113 transitions. [2024-06-21 20:34:46,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 553 flow [2024-06-21 20:34:46,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 524 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:34:46,071 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 372 flow [2024-06-21 20:34:46,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-21 20:34:46,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 20:34:46,073 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 372 flow [2024-06-21 20:34:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:46,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:34:46,073 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 20:34:46,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1919588069, now seen corresponding path program 1 times [2024-06-21 20:34:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:46,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578180048] [2024-06-21 20:34:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:46,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:46,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578180048] [2024-06-21 20:34:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578180048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:46,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:46,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:46,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422231166] [2024-06-21 20:34:46,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:46,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:46,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:46,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 372 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:46,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:46,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:46,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:47,221 INFO L124 PetriNetUnfolderBase]: 1733/2713 cut-off events. [2024-06-21 20:34:47,222 INFO L125 PetriNetUnfolderBase]: For 13636/13636 co-relation queries the response was YES. [2024-06-21 20:34:47,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 2713 events. 1733/2713 cut-off events. For 13636/13636 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13490 event pairs, 559 based on Foata normal form. 8/2720 useless extension candidates. Maximal degree in co-relation 10274. Up to 2371 conditions per place. [2024-06-21 20:34:47,238 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-21 20:34:47,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 726 flow [2024-06-21 20:34:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 20:34:47,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-21 20:34:47,240 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 372 flow. Second operand 7 states and 144 transitions. [2024-06-21 20:34:47,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 726 flow [2024-06-21 20:34:47,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 679 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:47,248 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 468 flow [2024-06-21 20:34:47,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=468, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-21 20:34:47,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 20:34:47,250 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 468 flow [2024-06-21 20:34:47,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:47,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:47,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:47,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:34:47,251 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 20:34:47,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1375890695, now seen corresponding path program 2 times [2024-06-21 20:34:47,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:47,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997044992] [2024-06-21 20:34:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:47,857 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 20:34:47,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:47,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997044992] [2024-06-21 20:34:47,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997044992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:47,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:47,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:47,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189736103] [2024-06-21 20:34:47,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:47,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:47,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 468 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:47,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:47,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:47,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:48,418 INFO L124 PetriNetUnfolderBase]: 1755/2745 cut-off events. [2024-06-21 20:34:48,418 INFO L125 PetriNetUnfolderBase]: For 16752/16752 co-relation queries the response was YES. [2024-06-21 20:34:48,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11396 conditions, 2745 events. 1755/2745 cut-off events. For 16752/16752 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13620 event pairs, 586 based on Foata normal form. 4/2749 useless extension candidates. Maximal degree in co-relation 11368. Up to 2569 conditions per place. [2024-06-21 20:34:48,435 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-21 20:34:48,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 95 transitions, 730 flow [2024-06-21 20:34:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:34:48,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 20:34:48,437 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 468 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:34:48,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 95 transitions, 730 flow [2024-06-21 20:34:48,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 702 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 20:34:48,455 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 512 flow [2024-06-21 20:34:48,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 20:34:48,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 20:34:48,456 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 512 flow [2024-06-21 20:34:48,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:48,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:48,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:48,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:34:48,456 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 20:34:48,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1511863067, now seen corresponding path program 3 times [2024-06-21 20:34:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:48,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029876469] [2024-06-21 20:34:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:48,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:49,135 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 20:34:49,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:49,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029876469] [2024-06-21 20:34:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029876469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:49,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019410694] [2024-06-21 20:34:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:49,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:49,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:49,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:49,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:49,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:49,749 INFO L124 PetriNetUnfolderBase]: 1745/2731 cut-off events. [2024-06-21 20:34:49,750 INFO L125 PetriNetUnfolderBase]: For 19600/19600 co-relation queries the response was YES. [2024-06-21 20:34:49,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11651 conditions, 2731 events. 1745/2731 cut-off events. For 19600/19600 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13556 event pairs, 584 based on Foata normal form. 4/2735 useless extension candidates. Maximal degree in co-relation 11620. Up to 2528 conditions per place. [2024-06-21 20:34:49,764 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-21 20:34:49,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 792 flow [2024-06-21 20:34:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:34:49,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 20:34:49,766 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 512 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:34:49,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 792 flow [2024-06-21 20:34:49,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 744 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:49,783 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 552 flow [2024-06-21 20:34:49,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-21 20:34:49,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 20:34:49,783 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 552 flow [2024-06-21 20:34:49,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:49,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:49,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:49,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:34:49,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:49,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1153240174, now seen corresponding path program 1 times [2024-06-21 20:34:49,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187331885] [2024-06-21 20:34:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:50,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:50,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187331885] [2024-06-21 20:34:50,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187331885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:50,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:50,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:34:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024344673] [2024-06-21 20:34:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:50,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:34:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:34:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:34:50,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:34:50,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:50,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:50,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:34:50,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:50,835 INFO L124 PetriNetUnfolderBase]: 2236/3362 cut-off events. [2024-06-21 20:34:50,835 INFO L125 PetriNetUnfolderBase]: For 29493/29493 co-relation queries the response was YES. [2024-06-21 20:34:50,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14830 conditions, 3362 events. 2236/3362 cut-off events. For 29493/29493 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15975 event pairs, 822 based on Foata normal form. 1/3363 useless extension candidates. Maximal degree in co-relation 14799. Up to 3267 conditions per place. [2024-06-21 20:34:50,853 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-06-21 20:34:50,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 89 transitions, 752 flow [2024-06-21 20:34:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:34:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:34:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 20:34:50,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 20:34:50,854 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 552 flow. Second operand 5 states and 88 transitions. [2024-06-21 20:34:50,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 89 transitions, 752 flow [2024-06-21 20:34:50,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 89 transitions, 692 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:50,874 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 542 flow [2024-06-21 20:34:50,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-21 20:34:50,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 20:34:50,874 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 542 flow [2024-06-21 20:34:50,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:50,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:50,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:50,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:34:50,875 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 20:34:50,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash 331746832, now seen corresponding path program 1 times [2024-06-21 20:34:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466921338] [2024-06-21 20:34:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466921338] [2024-06-21 20:34:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466921338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:51,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292077917] [2024-06-21 20:34:51,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:51,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:51,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:51,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:51,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:51,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:52,329 INFO L124 PetriNetUnfolderBase]: 1830/2829 cut-off events. [2024-06-21 20:34:52,329 INFO L125 PetriNetUnfolderBase]: For 28816/28818 co-relation queries the response was YES. [2024-06-21 20:34:52,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13189 conditions, 2829 events. 1830/2829 cut-off events. For 28816/28818 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13971 event pairs, 608 based on Foata normal form. 4/2833 useless extension candidates. Maximal degree in co-relation 13157. Up to 2556 conditions per place. [2024-06-21 20:34:52,342 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2024-06-21 20:34:52,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 858 flow [2024-06-21 20:34:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:52,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:34:52,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 20:34:52,344 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 542 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:34:52,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 858 flow [2024-06-21 20:34:52,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 830 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:34:52,362 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 609 flow [2024-06-21 20:34:52,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=609, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-21 20:34:52,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 20:34:52,363 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 609 flow [2024-06-21 20:34:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:52,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:52,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:34:52,363 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 20:34:52,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash 335561847, now seen corresponding path program 1 times [2024-06-21 20:34:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454060706] [2024-06-21 20:34:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:53,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:53,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454060706] [2024-06-21 20:34:53,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454060706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:53,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:53,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368075055] [2024-06-21 20:34:53,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:53,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:53,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:53,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:53,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 609 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:53,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:53,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:53,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:53,767 INFO L124 PetriNetUnfolderBase]: 1852/2865 cut-off events. [2024-06-21 20:34:53,767 INFO L125 PetriNetUnfolderBase]: For 33308/33308 co-relation queries the response was YES. [2024-06-21 20:34:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14003 conditions, 2865 events. 1852/2865 cut-off events. For 33308/33308 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14187 event pairs, 575 based on Foata normal form. 4/2868 useless extension candidates. Maximal degree in co-relation 13970. Up to 2478 conditions per place. [2024-06-21 20:34:53,782 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 79 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2024-06-21 20:34:53,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1005 flow [2024-06-21 20:34:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:34:53,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 20:34:53,784 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 609 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:34:53,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1005 flow [2024-06-21 20:34:53,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 936 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:53,805 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 650 flow [2024-06-21 20:34:53,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-21 20:34:53,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 20:34:53,806 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 650 flow [2024-06-21 20:34:53,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:53,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:53,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:53,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:34:53,806 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 20:34:53,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash 335556267, now seen corresponding path program 2 times [2024-06-21 20:34:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:53,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999753165] [2024-06-21 20:34:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:54,426 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 20:34:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999753165] [2024-06-21 20:34:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999753165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:54,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:54,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765440746] [2024-06-21 20:34:54,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:54,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:54,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:54,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:54,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:54,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:54,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:54,933 INFO L124 PetriNetUnfolderBase]: 1874/2897 cut-off events. [2024-06-21 20:34:54,933 INFO L125 PetriNetUnfolderBase]: For 37698/37698 co-relation queries the response was YES. [2024-06-21 20:34:54,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14490 conditions, 2897 events. 1874/2897 cut-off events. For 37698/37698 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14406 event pairs, 573 based on Foata normal form. 4/2900 useless extension candidates. Maximal degree in co-relation 14456. Up to 2497 conditions per place. [2024-06-21 20:34:54,951 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 39 changer transitions 0/120 dead transitions. [2024-06-21 20:34:54,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 120 transitions, 1058 flow [2024-06-21 20:34:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 20:34:54,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-21 20:34:54,952 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 650 flow. Second operand 7 states and 148 transitions. [2024-06-21 20:34:54,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 120 transitions, 1058 flow [2024-06-21 20:34:54,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 120 transitions, 962 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:54,976 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 682 flow [2024-06-21 20:34:54,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-21 20:34:54,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 20:34:54,977 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 682 flow [2024-06-21 20:34:54,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:54,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:54,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:54,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:34:54,977 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:54,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1263668271, now seen corresponding path program 3 times [2024-06-21 20:34:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:54,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9201508] [2024-06-21 20:34:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:55,634 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 20:34:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9201508] [2024-06-21 20:34:55,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9201508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:55,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:55,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748134952] [2024-06-21 20:34:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:55,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:55,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:55,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 682 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:55,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:55,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:55,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:56,293 INFO L124 PetriNetUnfolderBase]: 1896/2929 cut-off events. [2024-06-21 20:34:56,293 INFO L125 PetriNetUnfolderBase]: For 41619/41619 co-relation queries the response was YES. [2024-06-21 20:34:56,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14907 conditions, 2929 events. 1896/2929 cut-off events. For 41619/41619 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14578 event pairs, 609 based on Foata normal form. 4/2933 useless extension candidates. Maximal degree in co-relation 14872. Up to 2711 conditions per place. [2024-06-21 20:34:56,306 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-21 20:34:56,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 1014 flow [2024-06-21 20:34:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:34:56,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 20:34:56,308 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 682 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:34:56,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 1014 flow [2024-06-21 20:34:56,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 929 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:56,337 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 687 flow [2024-06-21 20:34:56,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=687, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-21 20:34:56,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 20:34:56,338 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 687 flow [2024-06-21 20:34:56,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:56,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:56,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:56,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:34:56,338 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 20:34:56,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2018593127, now seen corresponding path program 4 times [2024-06-21 20:34:56,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:56,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461520080] [2024-06-21 20:34:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:56,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:57,012 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 20:34:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461520080] [2024-06-21 20:34:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461520080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:57,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:57,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990757627] [2024-06-21 20:34:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:57,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:57,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:57,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:57,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:57,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:57,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:57,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:57,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:57,650 INFO L124 PetriNetUnfolderBase]: 1886/2915 cut-off events. [2024-06-21 20:34:57,650 INFO L125 PetriNetUnfolderBase]: For 45121/45121 co-relation queries the response was YES. [2024-06-21 20:34:57,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14905 conditions, 2915 events. 1886/2915 cut-off events. For 45121/45121 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14510 event pairs, 602 based on Foata normal form. 4/2919 useless extension candidates. Maximal degree in co-relation 14869. Up to 2670 conditions per place. [2024-06-21 20:34:57,666 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 91 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-21 20:34:57,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 119 transitions, 983 flow [2024-06-21 20:34:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:34:57,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:34:57,668 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 687 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:34:57,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 119 transitions, 983 flow [2024-06-21 20:34:57,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 909 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:57,704 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 665 flow [2024-06-21 20:34:57,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-21 20:34:57,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 20:34:57,704 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 665 flow [2024-06-21 20:34:57,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:57,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:57,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:57,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:34:57,705 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 20:34:57,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2010964430, now seen corresponding path program 1 times [2024-06-21 20:34:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140971212] [2024-06-21 20:34:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:58,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:58,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140971212] [2024-06-21 20:34:58,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140971212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:58,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:58,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466396019] [2024-06-21 20:34:58,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:58,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:58,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:58,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:58,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:34:58,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 665 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:58,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:58,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:34:58,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:59,581 INFO L124 PetriNetUnfolderBase]: 2240/3399 cut-off events. [2024-06-21 20:34:59,581 INFO L125 PetriNetUnfolderBase]: For 56677/56677 co-relation queries the response was YES. [2024-06-21 20:34:59,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 3399 events. 2240/3399 cut-off events. For 56677/56677 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16372 event pairs, 741 based on Foata normal form. 4/3403 useless extension candidates. Maximal degree in co-relation 17256. Up to 3208 conditions per place. [2024-06-21 20:34:59,600 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-06-21 20:34:59,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 122 transitions, 1009 flow [2024-06-21 20:34:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:34:59,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 20:34:59,602 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 665 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:34:59,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 122 transitions, 1009 flow [2024-06-21 20:34:59,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 912 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:34:59,632 INFO L231 Difference]: Finished difference. Result has 90 places, 98 transitions, 671 flow [2024-06-21 20:34:59,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=671, PETRI_PLACES=90, PETRI_TRANSITIONS=98} [2024-06-21 20:34:59,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 20:34:59,634 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 98 transitions, 671 flow [2024-06-21 20:34:59,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:59,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:59,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:59,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:34:59,634 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:59,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1390705951, now seen corresponding path program 1 times [2024-06-21 20:34:59,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653381548] [2024-06-21 20:34:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:59,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653381548] [2024-06-21 20:35:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653381548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:00,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:00,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:35:00,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924713811] [2024-06-21 20:35:00,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:00,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:35:00,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:00,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:35:00,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:35:00,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:35:00,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 98 transitions, 671 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 20:35:00,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:00,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:35:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:00,850 INFO L124 PetriNetUnfolderBase]: 2292/3448 cut-off events. [2024-06-21 20:35:00,850 INFO L125 PetriNetUnfolderBase]: For 60807/60807 co-relation queries the response was YES. [2024-06-21 20:35:00,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17740 conditions, 3448 events. 2292/3448 cut-off events. For 60807/60807 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16276 event pairs, 802 based on Foata normal form. 3/3451 useless extension candidates. Maximal degree in co-relation 17701. Up to 3348 conditions per place. [2024-06-21 20:35:00,870 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 90 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-06-21 20:35:00,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 112 transitions, 927 flow [2024-06-21 20:35:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:35:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:35:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 20:35:00,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-21 20:35:00,871 INFO L175 Difference]: Start difference. First operand has 90 places, 98 transitions, 671 flow. Second operand 6 states and 103 transitions. [2024-06-21 20:35:00,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 112 transitions, 927 flow [2024-06-21 20:35:00,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 872 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:00,901 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 678 flow [2024-06-21 20:35:00,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=678, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-21 20:35:00,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-21 20:35:00,901 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 678 flow [2024-06-21 20:35:00,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 20:35:00,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:00,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:00,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:35:00,902 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 20:35:00,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:00,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1694157934, now seen corresponding path program 1 times [2024-06-21 20:35:00,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:00,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342294209] [2024-06-21 20:35:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:00,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:01,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342294209] [2024-06-21 20:35:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342294209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:01,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:01,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:01,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226578199] [2024-06-21 20:35:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:01,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:02,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:02,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 678 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:02,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:02,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:02,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:02,663 INFO L124 PetriNetUnfolderBase]: 2283/3522 cut-off events. [2024-06-21 20:35:02,671 INFO L125 PetriNetUnfolderBase]: For 70034/70048 co-relation queries the response was YES. [2024-06-21 20:35:02,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18868 conditions, 3522 events. 2283/3522 cut-off events. For 70034/70048 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17967 event pairs, 1009 based on Foata normal form. 6/3506 useless extension candidates. Maximal degree in co-relation 18828. Up to 3148 conditions per place. [2024-06-21 20:35:02,693 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 31 changer transitions 0/157 dead transitions. [2024-06-21 20:35:02,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 157 transitions, 1326 flow [2024-06-21 20:35:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:35:02,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:35:02,696 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 678 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:35:02,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 157 transitions, 1326 flow [2024-06-21 20:35:02,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1284 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:35:02,740 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 935 flow [2024-06-21 20:35:02,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-06-21 20:35:02,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 20:35:02,757 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 935 flow [2024-06-21 20:35:02,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:02,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:02,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:02,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:35:02,758 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 20:35:02,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2128752698, now seen corresponding path program 2 times [2024-06-21 20:35:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:02,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411526505] [2024-06-21 20:35:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:02,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411526505] [2024-06-21 20:35:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411526505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:03,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:03,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179088675] [2024-06-21 20:35:03,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:03,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:04,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:04,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 935 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:04,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:04,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:04,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:04,702 INFO L124 PetriNetUnfolderBase]: 2473/3813 cut-off events. [2024-06-21 20:35:04,702 INFO L125 PetriNetUnfolderBase]: For 76444/76458 co-relation queries the response was YES. [2024-06-21 20:35:04,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21087 conditions, 3813 events. 2473/3813 cut-off events. For 76444/76458 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19605 event pairs, 716 based on Foata normal form. 14/3809 useless extension candidates. Maximal degree in co-relation 21042. Up to 3288 conditions per place. [2024-06-21 20:35:04,727 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 130 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-21 20:35:04,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 199 transitions, 1893 flow [2024-06-21 20:35:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 20:35:04,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 20:35:04,729 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 935 flow. Second operand 9 states and 179 transitions. [2024-06-21 20:35:04,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 199 transitions, 1893 flow [2024-06-21 20:35:04,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 199 transitions, 1827 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-21 20:35:04,838 INFO L231 Difference]: Finished difference. Result has 111 places, 159 transitions, 1460 flow [2024-06-21 20:35:04,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1460, PETRI_PLACES=111, PETRI_TRANSITIONS=159} [2024-06-21 20:35:04,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 20:35:04,838 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 159 transitions, 1460 flow [2024-06-21 20:35:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:04,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:04,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:04,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:35:04,839 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 20:35:04,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1217678772, now seen corresponding path program 3 times [2024-06-21 20:35:04,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:04,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564597816] [2024-06-21 20:35:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:04,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:05,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564597816] [2024-06-21 20:35:05,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564597816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:05,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:05,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024409352] [2024-06-21 20:35:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:05,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:05,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:05,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:05,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 159 transitions, 1460 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:05,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:05,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:05,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:06,469 INFO L124 PetriNetUnfolderBase]: 2516/3887 cut-off events. [2024-06-21 20:35:06,470 INFO L125 PetriNetUnfolderBase]: For 84896/84910 co-relation queries the response was YES. [2024-06-21 20:35:06,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22544 conditions, 3887 events. 2516/3887 cut-off events. For 84896/84910 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20058 event pairs, 733 based on Foata normal form. 16/3898 useless extension candidates. Maximal degree in co-relation 22493. Up to 3452 conditions per place. [2024-06-21 20:35:06,494 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 139 selfloop transitions, 59 changer transitions 0/205 dead transitions. [2024-06-21 20:35:06,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 205 transitions, 2122 flow [2024-06-21 20:35:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:35:06,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 20:35:06,495 INFO L175 Difference]: Start difference. First operand has 111 places, 159 transitions, 1460 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:35:06,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 205 transitions, 2122 flow [2024-06-21 20:35:06,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 205 transitions, 2073 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 20:35:06,585 INFO L231 Difference]: Finished difference. Result has 119 places, 170 transitions, 1708 flow [2024-06-21 20:35:06,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1708, PETRI_PLACES=119, PETRI_TRANSITIONS=170} [2024-06-21 20:35:06,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 20:35:06,595 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 170 transitions, 1708 flow [2024-06-21 20:35:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:06,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:06,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:06,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:35:06,596 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 20:35:06,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1594153710, now seen corresponding path program 1 times [2024-06-21 20:35:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:06,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048329485] [2024-06-21 20:35:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:06,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:07,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:07,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048329485] [2024-06-21 20:35:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048329485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:07,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:07,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:07,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128579326] [2024-06-21 20:35:07,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:07,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:07,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:07,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:07,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:07,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:07,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 170 transitions, 1708 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:07,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:07,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:07,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:08,555 INFO L124 PetriNetUnfolderBase]: 2770/4280 cut-off events. [2024-06-21 20:35:08,555 INFO L125 PetriNetUnfolderBase]: For 94102/94114 co-relation queries the response was YES. [2024-06-21 20:35:08,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24767 conditions, 4280 events. 2770/4280 cut-off events. For 94102/94114 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22550 event pairs, 706 based on Foata normal form. 12/4288 useless extension candidates. Maximal degree in co-relation 24713. Up to 3483 conditions per place. [2024-06-21 20:35:08,582 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 166 selfloop transitions, 101 changer transitions 0/274 dead transitions. [2024-06-21 20:35:08,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 274 transitions, 2884 flow [2024-06-21 20:35:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:35:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:35:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-21 20:35:08,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47835497835497837 [2024-06-21 20:35:08,584 INFO L175 Difference]: Start difference. First operand has 119 places, 170 transitions, 1708 flow. Second operand 11 states and 221 transitions. [2024-06-21 20:35:08,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 274 transitions, 2884 flow [2024-06-21 20:35:08,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 274 transitions, 2722 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:08,689 INFO L231 Difference]: Finished difference. Result has 129 places, 222 transitions, 2278 flow [2024-06-21 20:35:08,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2278, PETRI_PLACES=129, PETRI_TRANSITIONS=222} [2024-06-21 20:35:08,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 20:35:08,690 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 222 transitions, 2278 flow [2024-06-21 20:35:08,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:08,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:08,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:08,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:35:08,691 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 20:35:08,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1596950096, now seen corresponding path program 4 times [2024-06-21 20:35:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:08,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103923483] [2024-06-21 20:35:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:09,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:09,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103923483] [2024-06-21 20:35:09,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103923483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:09,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:09,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925152310] [2024-06-21 20:35:09,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:09,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:09,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:09,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:09,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 222 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:09,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:09,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:09,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:10,553 INFO L124 PetriNetUnfolderBase]: 2773/4285 cut-off events. [2024-06-21 20:35:10,553 INFO L125 PetriNetUnfolderBase]: For 102733/102747 co-relation queries the response was YES. [2024-06-21 20:35:10,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26405 conditions, 4285 events. 2773/4285 cut-off events. For 102733/102747 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 22580 event pairs, 742 based on Foata normal form. 16/4294 useless extension candidates. Maximal degree in co-relation 26345. Up to 3857 conditions per place. [2024-06-21 20:35:10,588 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 197 selfloop transitions, 52 changer transitions 0/256 dead transitions. [2024-06-21 20:35:10,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 256 transitions, 2935 flow [2024-06-21 20:35:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:35:10,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 20:35:10,591 INFO L175 Difference]: Start difference. First operand has 129 places, 222 transitions, 2278 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:35:10,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 256 transitions, 2935 flow [2024-06-21 20:35:10,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 256 transitions, 2884 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 20:35:10,712 INFO L231 Difference]: Finished difference. Result has 136 places, 224 transitions, 2385 flow [2024-06-21 20:35:10,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2385, PETRI_PLACES=136, PETRI_TRANSITIONS=224} [2024-06-21 20:35:10,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 20:35:10,713 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 224 transitions, 2385 flow [2024-06-21 20:35:10,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:10,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:10,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:10,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:35:10,713 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:10,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1517822254, now seen corresponding path program 5 times [2024-06-21 20:35:10,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:10,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658775695] [2024-06-21 20:35:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658775695] [2024-06-21 20:35:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658775695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:11,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:11,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:35:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808803305] [2024-06-21 20:35:11,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:11,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:35:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:35:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:35:11,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:11,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 224 transitions, 2385 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:11,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:11,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:11,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:12,161 INFO L124 PetriNetUnfolderBase]: 2960/4601 cut-off events. [2024-06-21 20:35:12,162 INFO L125 PetriNetUnfolderBase]: For 114518/114541 co-relation queries the response was YES. [2024-06-21 20:35:12,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28477 conditions, 4601 events. 2960/4601 cut-off events. For 114518/114541 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24908 event pairs, 618 based on Foata normal form. 22/4613 useless extension candidates. Maximal degree in co-relation 28415. Up to 3615 conditions per place. [2024-06-21 20:35:12,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 116 changer transitions 0/284 dead transitions. [2024-06-21 20:35:12,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 284 transitions, 3533 flow [2024-06-21 20:35:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:35:12,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:35:12,198 INFO L175 Difference]: Start difference. First operand has 136 places, 224 transitions, 2385 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:35:12,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 284 transitions, 3533 flow [2024-06-21 20:35:12,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 284 transitions, 3351 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 20:35:12,326 INFO L231 Difference]: Finished difference. Result has 139 places, 254 transitions, 2880 flow [2024-06-21 20:35:12,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2880, PETRI_PLACES=139, PETRI_TRANSITIONS=254} [2024-06-21 20:35:12,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 20:35:12,327 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 254 transitions, 2880 flow [2024-06-21 20:35:12,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:12,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:12,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:12,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:35:12,327 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:12,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:12,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1957412476, now seen corresponding path program 6 times [2024-06-21 20:35:12,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:12,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222944139] [2024-06-21 20:35:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:12,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:13,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:13,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222944139] [2024-06-21 20:35:13,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222944139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:13,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:13,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:13,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286114867] [2024-06-21 20:35:13,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:13,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:13,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:13,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:13,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 254 transitions, 2880 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:13,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:13,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:13,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:14,095 INFO L124 PetriNetUnfolderBase]: 3176/4942 cut-off events. [2024-06-21 20:35:14,095 INFO L125 PetriNetUnfolderBase]: For 129258/129281 co-relation queries the response was YES. [2024-06-21 20:35:14,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31875 conditions, 4942 events. 3176/4942 cut-off events. For 129258/129281 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27308 event pairs, 766 based on Foata normal form. 20/4950 useless extension candidates. Maximal degree in co-relation 31810. Up to 4178 conditions per place. [2024-06-21 20:35:14,136 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 208 selfloop transitions, 117 changer transitions 0/332 dead transitions. [2024-06-21 20:35:14,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 332 transitions, 4367 flow [2024-06-21 20:35:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 20:35:14,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:35:14,141 INFO L175 Difference]: Start difference. First operand has 139 places, 254 transitions, 2880 flow. Second operand 9 states and 180 transitions. [2024-06-21 20:35:14,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 332 transitions, 4367 flow [2024-06-21 20:35:14,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 332 transitions, 4182 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 20:35:14,346 INFO L231 Difference]: Finished difference. Result has 147 places, 295 transitions, 3654 flow [2024-06-21 20:35:14,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3654, PETRI_PLACES=147, PETRI_TRANSITIONS=295} [2024-06-21 20:35:14,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 20:35:14,347 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 295 transitions, 3654 flow [2024-06-21 20:35:14,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:14,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:14,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:14,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:35:14,348 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:14,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -473321374, now seen corresponding path program 2 times [2024-06-21 20:35:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:14,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160302158] [2024-06-21 20:35:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:14,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160302158] [2024-06-21 20:35:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160302158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:14,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948853828] [2024-06-21 20:35:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:15,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:15,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 295 transitions, 3654 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:15,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:15,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:15,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:16,006 INFO L124 PetriNetUnfolderBase]: 3278/5102 cut-off events. [2024-06-21 20:35:16,006 INFO L125 PetriNetUnfolderBase]: For 139864/139877 co-relation queries the response was YES. [2024-06-21 20:35:16,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33887 conditions, 5102 events. 3278/5102 cut-off events. For 139864/139877 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28312 event pairs, 758 based on Foata normal form. 12/5104 useless extension candidates. Maximal degree in co-relation 33818. Up to 4114 conditions per place. [2024-06-21 20:35:16,052 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 247 selfloop transitions, 133 changer transitions 0/387 dead transitions. [2024-06-21 20:35:16,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 387 transitions, 5381 flow [2024-06-21 20:35:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 20:35:16,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-21 20:35:16,054 INFO L175 Difference]: Start difference. First operand has 147 places, 295 transitions, 3654 flow. Second operand 9 states and 190 transitions. [2024-06-21 20:35:16,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 387 transitions, 5381 flow [2024-06-21 20:35:16,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 387 transitions, 5189 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:16,249 INFO L231 Difference]: Finished difference. Result has 155 places, 345 transitions, 4468 flow [2024-06-21 20:35:16,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4468, PETRI_PLACES=155, PETRI_TRANSITIONS=345} [2024-06-21 20:35:16,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 20:35:16,249 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 345 transitions, 4468 flow [2024-06-21 20:35:16,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:16,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:16,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:35:16,250 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 20:35:16,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1957409686, now seen corresponding path program 7 times [2024-06-21 20:35:16,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:16,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947792549] [2024-06-21 20:35:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:16,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:16,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947792549] [2024-06-21 20:35:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947792549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:16,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:16,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:16,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475442152] [2024-06-21 20:35:16,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:16,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:16,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:16,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 345 transitions, 4468 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:16,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:16,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:16,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:18,027 INFO L124 PetriNetUnfolderBase]: 3277/5119 cut-off events. [2024-06-21 20:35:18,027 INFO L125 PetriNetUnfolderBase]: For 152350/152358 co-relation queries the response was YES. [2024-06-21 20:35:18,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35742 conditions, 5119 events. 3277/5119 cut-off events. For 152350/152358 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28619 event pairs, 802 based on Foata normal form. 14/5127 useless extension candidates. Maximal degree in co-relation 35669. Up to 4481 conditions per place. [2024-06-21 20:35:18,067 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 270 selfloop transitions, 103 changer transitions 0/380 dead transitions. [2024-06-21 20:35:18,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 380 transitions, 5412 flow [2024-06-21 20:35:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:35:18,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 20:35:18,068 INFO L175 Difference]: Start difference. First operand has 155 places, 345 transitions, 4468 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:35:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 380 transitions, 5412 flow [2024-06-21 20:35:18,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 380 transitions, 5321 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 20:35:18,299 INFO L231 Difference]: Finished difference. Result has 162 places, 349 transitions, 4694 flow [2024-06-21 20:35:18,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4694, PETRI_PLACES=162, PETRI_TRANSITIONS=349} [2024-06-21 20:35:18,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 20:35:18,300 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 349 transitions, 4694 flow [2024-06-21 20:35:18,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:18,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:18,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:18,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:35:18,301 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 20:35:18,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1905601502, now seen corresponding path program 3 times [2024-06-21 20:35:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:18,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186023115] [2024-06-21 20:35:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:19,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:19,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186023115] [2024-06-21 20:35:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186023115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:19,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:19,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980826499] [2024-06-21 20:35:19,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:19,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:19,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:19,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 349 transitions, 4694 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:19,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:19,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:19,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:20,265 INFO L124 PetriNetUnfolderBase]: 3485/5420 cut-off events. [2024-06-21 20:35:20,265 INFO L125 PetriNetUnfolderBase]: For 165524/165531 co-relation queries the response was YES. [2024-06-21 20:35:20,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38564 conditions, 5420 events. 3485/5420 cut-off events. For 165524/165531 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30407 event pairs, 816 based on Foata normal form. 12/5425 useless extension candidates. Maximal degree in co-relation 38489. Up to 4517 conditions per place. [2024-06-21 20:35:20,316 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 298 selfloop transitions, 146 changer transitions 0/451 dead transitions. [2024-06-21 20:35:20,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 451 transitions, 6664 flow [2024-06-21 20:35:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 20:35:20,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-21 20:35:20,318 INFO L175 Difference]: Start difference. First operand has 162 places, 349 transitions, 4694 flow. Second operand 10 states and 206 transitions. [2024-06-21 20:35:20,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 451 transitions, 6664 flow [2024-06-21 20:35:20,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 451 transitions, 6359 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 20:35:20,617 INFO L231 Difference]: Finished difference. Result has 167 places, 403 transitions, 5609 flow [2024-06-21 20:35:20,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4417, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5609, PETRI_PLACES=167, PETRI_TRANSITIONS=403} [2024-06-21 20:35:20,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 20:35:20,618 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 403 transitions, 5609 flow [2024-06-21 20:35:20,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:20,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:20,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:20,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:35:20,619 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:20,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1905423872, now seen corresponding path program 4 times [2024-06-21 20:35:20,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:20,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95837583] [2024-06-21 20:35:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:20,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:21,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:21,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95837583] [2024-06-21 20:35:21,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95837583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:21,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:21,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:21,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188076073] [2024-06-21 20:35:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:21,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:21,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:21,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:21,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:21,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:21,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 403 transitions, 5609 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:21,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:21,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:21,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:22,897 INFO L124 PetriNetUnfolderBase]: 3503/5442 cut-off events. [2024-06-21 20:35:22,898 INFO L125 PetriNetUnfolderBase]: For 173128/173141 co-relation queries the response was YES. [2024-06-21 20:35:22,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39542 conditions, 5442 events. 3503/5442 cut-off events. For 173128/173141 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30474 event pairs, 835 based on Foata normal form. 16/5453 useless extension candidates. Maximal degree in co-relation 39464. Up to 4642 conditions per place. [2024-06-21 20:35:22,944 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 318 selfloop transitions, 128 changer transitions 0/453 dead transitions. [2024-06-21 20:35:22,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 453 transitions, 6845 flow [2024-06-21 20:35:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 20:35:22,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 20:35:22,953 INFO L175 Difference]: Start difference. First operand has 167 places, 403 transitions, 5609 flow. Second operand 10 states and 199 transitions. [2024-06-21 20:35:22,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 453 transitions, 6845 flow [2024-06-21 20:35:23,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 453 transitions, 6728 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 20:35:23,365 INFO L231 Difference]: Finished difference. Result has 174 places, 413 transitions, 5935 flow [2024-06-21 20:35:23,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5494, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5935, PETRI_PLACES=174, PETRI_TRANSITIONS=413} [2024-06-21 20:35:23,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 20:35:23,366 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 413 transitions, 5935 flow [2024-06-21 20:35:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:23,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:23,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:23,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:35:23,367 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 20:35:23,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1622724367, now seen corresponding path program 1 times [2024-06-21 20:35:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966068324] [2024-06-21 20:35:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:23,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:23,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966068324] [2024-06-21 20:35:23,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966068324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:23,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:35:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601902684] [2024-06-21 20:35:23,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:23,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:35:23,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:35:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:35:23,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:35:23,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 413 transitions, 5935 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 20:35:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:23,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:35:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:24,962 INFO L124 PetriNetUnfolderBase]: 3781/5771 cut-off events. [2024-06-21 20:35:24,962 INFO L125 PetriNetUnfolderBase]: For 192322/192410 co-relation queries the response was YES. [2024-06-21 20:35:24,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41457 conditions, 5771 events. 3781/5771 cut-off events. For 192322/192410 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31456 event pairs, 1346 based on Foata normal form. 33/5777 useless extension candidates. Maximal degree in co-relation 41377. Up to 5356 conditions per place. [2024-06-21 20:35:25,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 348 selfloop transitions, 22 changer transitions 0/439 dead transitions. [2024-06-21 20:35:25,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 439 transitions, 6887 flow [2024-06-21 20:35:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:35:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:35:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 20:35:25,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 20:35:25,021 INFO L175 Difference]: Start difference. First operand has 174 places, 413 transitions, 5935 flow. Second operand 7 states and 127 transitions. [2024-06-21 20:35:25,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 439 transitions, 6887 flow [2024-06-21 20:35:25,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 439 transitions, 6567 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 20:35:25,463 INFO L231 Difference]: Finished difference. Result has 175 places, 421 transitions, 5776 flow [2024-06-21 20:35:25,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5776, PETRI_PLACES=175, PETRI_TRANSITIONS=421} [2024-06-21 20:35:25,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 20:35:25,465 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 421 transitions, 5776 flow [2024-06-21 20:35:25,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 20:35:25,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:25,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:25,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:35:25,466 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 20:35:25,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:25,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1616604824, now seen corresponding path program 1 times [2024-06-21 20:35:25,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:25,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947666265] [2024-06-21 20:35:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:25,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947666265] [2024-06-21 20:35:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947666265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:26,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:26,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:26,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092616691] [2024-06-21 20:35:26,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:26,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:26,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:26,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:26,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 421 transitions, 5776 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:26,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:26,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:27,814 INFO L124 PetriNetUnfolderBase]: 3743/5806 cut-off events. [2024-06-21 20:35:27,814 INFO L125 PetriNetUnfolderBase]: For 227560/227592 co-relation queries the response was YES. [2024-06-21 20:35:27,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43526 conditions, 5806 events. 3743/5806 cut-off events. For 227560/227592 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 33190 event pairs, 885 based on Foata normal form. 28/5802 useless extension candidates. Maximal degree in co-relation 43444. Up to 4150 conditions per place. [2024-06-21 20:35:27,877 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 301 selfloop transitions, 178 changer transitions 0/488 dead transitions. [2024-06-21 20:35:27,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 488 transitions, 7479 flow [2024-06-21 20:35:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 20:35:27,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2024-06-21 20:35:27,879 INFO L175 Difference]: Start difference. First operand has 175 places, 421 transitions, 5776 flow. Second operand 10 states and 211 transitions. [2024-06-21 20:35:27,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 488 transitions, 7479 flow [2024-06-21 20:35:28,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 488 transitions, 7440 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 20:35:28,303 INFO L231 Difference]: Finished difference. Result has 185 places, 429 transitions, 6376 flow [2024-06-21 20:35:28,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5737, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6376, PETRI_PLACES=185, PETRI_TRANSITIONS=429} [2024-06-21 20:35:28,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 20:35:28,304 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 429 transitions, 6376 flow [2024-06-21 20:35:28,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:28,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:28,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:28,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:35:28,305 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:28,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1694218384, now seen corresponding path program 8 times [2024-06-21 20:35:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66213439] [2024-06-21 20:35:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:29,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66213439] [2024-06-21 20:35:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66213439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:29,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:29,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138693308] [2024-06-21 20:35:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:29,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:29,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 429 transitions, 6376 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:29,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:29,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:29,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:30,478 INFO L124 PetriNetUnfolderBase]: 3660/5705 cut-off events. [2024-06-21 20:35:30,478 INFO L125 PetriNetUnfolderBase]: For 231525/231549 co-relation queries the response was YES. [2024-06-21 20:35:30,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43758 conditions, 5705 events. 3660/5705 cut-off events. For 231525/231549 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 32761 event pairs, 1313 based on Foata normal form. 12/5685 useless extension candidates. Maximal degree in co-relation 43672. Up to 5131 conditions per place. [2024-06-21 20:35:30,545 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 89 changer transitions 0/466 dead transitions. [2024-06-21 20:35:30,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 466 transitions, 7532 flow [2024-06-21 20:35:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 20:35:30,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 20:35:30,547 INFO L175 Difference]: Start difference. First operand has 185 places, 429 transitions, 6376 flow. Second operand 10 states and 182 transitions. [2024-06-21 20:35:30,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 466 transitions, 7532 flow [2024-06-21 20:35:31,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 466 transitions, 7417 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 20:35:31,210 INFO L231 Difference]: Finished difference. Result has 195 places, 436 transitions, 6640 flow [2024-06-21 20:35:31,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6261, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6640, PETRI_PLACES=195, PETRI_TRANSITIONS=436} [2024-06-21 20:35:31,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 20:35:31,211 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 436 transitions, 6640 flow [2024-06-21 20:35:31,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:31,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:31,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:31,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:35:31,212 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:31,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1694218508, now seen corresponding path program 5 times [2024-06-21 20:35:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007092179] [2024-06-21 20:35:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:32,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:32,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007092179] [2024-06-21 20:35:32,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007092179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:32,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:32,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:32,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794241128] [2024-06-21 20:35:32,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:32,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:32,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:32,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:32,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 436 transitions, 6640 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:32,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:32,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:32,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:33,389 INFO L124 PetriNetUnfolderBase]: 3755/5839 cut-off events. [2024-06-21 20:35:33,389 INFO L125 PetriNetUnfolderBase]: For 245076/245106 co-relation queries the response was YES. [2024-06-21 20:35:33,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45583 conditions, 5839 events. 3755/5839 cut-off events. For 245076/245106 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33664 event pairs, 963 based on Foata normal form. 20/5835 useless extension candidates. Maximal degree in co-relation 45492. Up to 4439 conditions per place. [2024-06-21 20:35:33,443 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 216 selfloop transitions, 272 changer transitions 0/497 dead transitions. [2024-06-21 20:35:33,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 497 transitions, 8274 flow [2024-06-21 20:35:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 20:35:33,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-21 20:35:33,444 INFO L175 Difference]: Start difference. First operand has 195 places, 436 transitions, 6640 flow. Second operand 10 states and 202 transitions. [2024-06-21 20:35:33,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 497 transitions, 8274 flow [2024-06-21 20:35:33,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 497 transitions, 8051 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 20:35:33,948 INFO L231 Difference]: Finished difference. Result has 197 places, 452 transitions, 7314 flow [2024-06-21 20:35:33,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6417, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7314, PETRI_PLACES=197, PETRI_TRANSITIONS=452} [2024-06-21 20:35:33,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 20:35:33,949 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 452 transitions, 7314 flow [2024-06-21 20:35:33,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:33,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:33,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:33,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:35:33,950 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:33,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1812306188, now seen corresponding path program 6 times [2024-06-21 20:35:33,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:33,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944377963] [2024-06-21 20:35:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:33,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:34,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944377963] [2024-06-21 20:35:34,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944377963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:34,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699504041] [2024-06-21 20:35:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:34,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:34,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:34,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:34,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 452 transitions, 7314 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:34,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:34,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:34,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:36,012 INFO L124 PetriNetUnfolderBase]: 3806/5896 cut-off events. [2024-06-21 20:35:36,012 INFO L125 PetriNetUnfolderBase]: For 255998/256024 co-relation queries the response was YES. [2024-06-21 20:35:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47322 conditions, 5896 events. 3806/5896 cut-off events. For 255998/256024 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33962 event pairs, 1014 based on Foata normal form. 20/5894 useless extension candidates. Maximal degree in co-relation 47230. Up to 4722 conditions per place. [2024-06-21 20:35:36,076 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 268 selfloop transitions, 237 changer transitions 0/514 dead transitions. [2024-06-21 20:35:36,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 514 transitions, 9062 flow [2024-06-21 20:35:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 20:35:36,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-21 20:35:36,077 INFO L175 Difference]: Start difference. First operand has 197 places, 452 transitions, 7314 flow. Second operand 8 states and 171 transitions. [2024-06-21 20:35:36,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 514 transitions, 9062 flow [2024-06-21 20:35:36,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 514 transitions, 8646 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-21 20:35:36,659 INFO L231 Difference]: Finished difference. Result has 197 places, 473 transitions, 7791 flow [2024-06-21 20:35:36,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6912, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=197, PETRI_TRANSITIONS=473} [2024-06-21 20:35:36,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 20:35:36,660 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 473 transitions, 7791 flow [2024-06-21 20:35:36,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:36,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:36,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:36,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:35:36,660 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:36,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1812483818, now seen corresponding path program 7 times [2024-06-21 20:35:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373440406] [2024-06-21 20:35:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:37,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373440406] [2024-06-21 20:35:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373440406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:37,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:37,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:37,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579226440] [2024-06-21 20:35:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:37,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:37,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:37,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 473 transitions, 7791 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:37,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:37,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:37,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:38,900 INFO L124 PetriNetUnfolderBase]: 3843/5990 cut-off events. [2024-06-21 20:35:38,900 INFO L125 PetriNetUnfolderBase]: For 240661/240690 co-relation queries the response was YES. [2024-06-21 20:35:38,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48085 conditions, 5990 events. 3843/5990 cut-off events. For 240661/240690 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34753 event pairs, 1136 based on Foata normal form. 20/5995 useless extension candidates. Maximal degree in co-relation 47993. Up to 5039 conditions per place. [2024-06-21 20:35:38,965 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 347 selfloop transitions, 173 changer transitions 0/529 dead transitions. [2024-06-21 20:35:38,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 529 transitions, 9463 flow [2024-06-21 20:35:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:35:38,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 20:35:38,966 INFO L175 Difference]: Start difference. First operand has 197 places, 473 transitions, 7791 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:35:38,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 529 transitions, 9463 flow [2024-06-21 20:35:39,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 529 transitions, 8843 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:39,568 INFO L231 Difference]: Finished difference. Result has 200 places, 491 transitions, 8012 flow [2024-06-21 20:35:39,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7207, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8012, PETRI_PLACES=200, PETRI_TRANSITIONS=491} [2024-06-21 20:35:39,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 20:35:39,569 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 491 transitions, 8012 flow [2024-06-21 20:35:39,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:39,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:39,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:39,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:35:39,570 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:39,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1812310838, now seen corresponding path program 8 times [2024-06-21 20:35:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:39,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102048439] [2024-06-21 20:35:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:40,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:40,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102048439] [2024-06-21 20:35:40,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102048439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:40,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:40,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636703349] [2024-06-21 20:35:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:40,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:40,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:40,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 491 transitions, 8012 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:40,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:40,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:40,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:41,533 INFO L124 PetriNetUnfolderBase]: 3903/6068 cut-off events. [2024-06-21 20:35:41,533 INFO L125 PetriNetUnfolderBase]: For 253393/253421 co-relation queries the response was YES. [2024-06-21 20:35:41,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48911 conditions, 6068 events. 3903/6068 cut-off events. For 253393/253421 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35239 event pairs, 1129 based on Foata normal form. 18/6067 useless extension candidates. Maximal degree in co-relation 48818. Up to 5138 conditions per place. [2024-06-21 20:35:41,610 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 358 selfloop transitions, 173 changer transitions 0/540 dead transitions. [2024-06-21 20:35:41,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 540 transitions, 9567 flow [2024-06-21 20:35:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 20:35:41,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 20:35:41,612 INFO L175 Difference]: Start difference. First operand has 200 places, 491 transitions, 8012 flow. Second operand 8 states and 164 transitions. [2024-06-21 20:35:41,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 540 transitions, 9567 flow [2024-06-21 20:35:42,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 540 transitions, 9073 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-21 20:35:42,249 INFO L231 Difference]: Finished difference. Result has 201 places, 504 transitions, 8213 flow [2024-06-21 20:35:42,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7518, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8213, PETRI_PLACES=201, PETRI_TRANSITIONS=504} [2024-06-21 20:35:42,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 20:35:42,254 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 504 transitions, 8213 flow [2024-06-21 20:35:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:42,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:42,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:42,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:35:42,255 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 20:35:42,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash -174605455, now seen corresponding path program 2 times [2024-06-21 20:35:42,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:42,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934186811] [2024-06-21 20:35:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:42,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:42,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934186811] [2024-06-21 20:35:42,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934186811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:42,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:42,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:35:42,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51326868] [2024-06-21 20:35:42,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:42,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:35:42,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:35:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:35:42,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:35:42,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 504 transitions, 8213 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 20:35:42,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:42,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:35:42,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:44,049 INFO L124 PetriNetUnfolderBase]: 4351/6646 cut-off events. [2024-06-21 20:35:44,049 INFO L125 PetriNetUnfolderBase]: For 262755/262853 co-relation queries the response was YES. [2024-06-21 20:35:44,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52490 conditions, 6646 events. 4351/6646 cut-off events. For 262755/262853 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 37444 event pairs, 1589 based on Foata normal form. 37/6643 useless extension candidates. Maximal degree in co-relation 52396. Up to 6224 conditions per place. [2024-06-21 20:35:44,118 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 427 selfloop transitions, 25 changer transitions 0/521 dead transitions. [2024-06-21 20:35:44,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 521 transitions, 9276 flow [2024-06-21 20:35:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:35:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:35:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 20:35:44,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 20:35:44,119 INFO L175 Difference]: Start difference. First operand has 201 places, 504 transitions, 8213 flow. Second operand 6 states and 110 transitions. [2024-06-21 20:35:44,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 521 transitions, 9276 flow [2024-06-21 20:35:44,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 521 transitions, 8809 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:44,903 INFO L231 Difference]: Finished difference. Result has 201 places, 507 transitions, 7848 flow [2024-06-21 20:35:44,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7746, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7848, PETRI_PLACES=201, PETRI_TRANSITIONS=507} [2024-06-21 20:35:44,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 20:35:44,909 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 507 transitions, 7848 flow [2024-06-21 20:35:44,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 20:35:44,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:44,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:44,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:35:44,910 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:44,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash 450931332, now seen corresponding path program 2 times [2024-06-21 20:35:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:44,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377429074] [2024-06-21 20:35:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:44,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:45,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:45,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377429074] [2024-06-21 20:35:45,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377429074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:45,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:45,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:45,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352773542] [2024-06-21 20:35:45,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:45,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:45,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:45,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:45,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:45,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 507 transitions, 7848 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:45,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:45,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:45,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:47,403 INFO L124 PetriNetUnfolderBase]: 4284/6729 cut-off events. [2024-06-21 20:35:47,403 INFO L125 PetriNetUnfolderBase]: For 297821/297850 co-relation queries the response was YES. [2024-06-21 20:35:47,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53972 conditions, 6729 events. 4284/6729 cut-off events. For 297821/297850 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40275 event pairs, 1136 based on Foata normal form. 26/6727 useless extension candidates. Maximal degree in co-relation 53877. Up to 4425 conditions per place. [2024-06-21 20:35:47,484 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 313 selfloop transitions, 245 changer transitions 0/568 dead transitions. [2024-06-21 20:35:47,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 568 transitions, 9576 flow [2024-06-21 20:35:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 20:35:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2024-06-21 20:35:47,486 INFO L175 Difference]: Start difference. First operand has 201 places, 507 transitions, 7848 flow. Second operand 10 states and 211 transitions. [2024-06-21 20:35:47,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 568 transitions, 9576 flow [2024-06-21 20:35:48,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 568 transitions, 9512 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:35:48,207 INFO L231 Difference]: Finished difference. Result has 208 places, 511 transitions, 8496 flow [2024-06-21 20:35:48,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8496, PETRI_PLACES=208, PETRI_TRANSITIONS=511} [2024-06-21 20:35:48,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 20:35:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 511 transitions, 8496 flow [2024-06-21 20:35:48,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:48,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:48,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:35:48,220 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:48,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash -610355514, now seen corresponding path program 1 times [2024-06-21 20:35:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130078043] [2024-06-21 20:35:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:49,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130078043] [2024-06-21 20:35:49,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130078043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:49,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518212193] [2024-06-21 20:35:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:49,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:49,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:49,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:35:49,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 511 transitions, 8496 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:49,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:49,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:35:49,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:50,841 INFO L124 PetriNetUnfolderBase]: 4877/7445 cut-off events. [2024-06-21 20:35:50,841 INFO L125 PetriNetUnfolderBase]: For 324110/324124 co-relation queries the response was YES. [2024-06-21 20:35:50,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60617 conditions, 7445 events. 4877/7445 cut-off events. For 324110/324124 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42658 event pairs, 1939 based on Foata normal form. 2/7421 useless extension candidates. Maximal degree in co-relation 60521. Up to 7153 conditions per place. [2024-06-21 20:35:50,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 511 selfloop transitions, 28 changer transitions 0/547 dead transitions. [2024-06-21 20:35:50,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 547 transitions, 9851 flow [2024-06-21 20:35:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:35:50,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 20:35:50,928 INFO L175 Difference]: Start difference. First operand has 208 places, 511 transitions, 8496 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:35:50,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 547 transitions, 9851 flow [2024-06-21 20:35:51,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 547 transitions, 9557 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:51,855 INFO L231 Difference]: Finished difference. Result has 210 places, 522 transitions, 8457 flow [2024-06-21 20:35:51,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8209, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8457, PETRI_PLACES=210, PETRI_TRANSITIONS=522} [2024-06-21 20:35:51,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 20:35:51,856 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 522 transitions, 8457 flow [2024-06-21 20:35:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:51,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:51,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:51,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:35:51,856 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 20:35:51,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -645843826, now seen corresponding path program 1 times [2024-06-21 20:35:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607682028] [2024-06-21 20:35:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:52,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:52,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607682028] [2024-06-21 20:35:52,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607682028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:52,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:35:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450061392] [2024-06-21 20:35:52,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:52,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:35:52,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:35:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:35:52,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:35:52,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 522 transitions, 8457 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:52,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:52,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:35:52,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:53,938 INFO L124 PetriNetUnfolderBase]: 4775/7334 cut-off events. [2024-06-21 20:35:53,939 INFO L125 PetriNetUnfolderBase]: For 328312/328410 co-relation queries the response was YES. [2024-06-21 20:35:53,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59304 conditions, 7334 events. 4775/7334 cut-off events. For 328312/328410 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 42633 event pairs, 1779 based on Foata normal form. 39/7323 useless extension candidates. Maximal degree in co-relation 59206. Up to 6890 conditions per place. [2024-06-21 20:35:54,017 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 449 selfloop transitions, 32 changer transitions 0/550 dead transitions. [2024-06-21 20:35:54,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 550 transitions, 9637 flow [2024-06-21 20:35:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:35:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:35:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:35:54,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 20:35:54,019 INFO L175 Difference]: Start difference. First operand has 210 places, 522 transitions, 8457 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:35:54,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 550 transitions, 9637 flow [2024-06-21 20:35:54,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 550 transitions, 9560 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:54,846 INFO L231 Difference]: Finished difference. Result has 212 places, 531 transitions, 8558 flow [2024-06-21 20:35:54,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8380, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8558, PETRI_PLACES=212, PETRI_TRANSITIONS=531} [2024-06-21 20:35:54,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 20:35:54,847 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 531 transitions, 8558 flow [2024-06-21 20:35:54,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:54,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:54,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:54,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:35:54,847 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:54,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash -340618614, now seen corresponding path program 3 times [2024-06-21 20:35:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:54,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501635219] [2024-06-21 20:35:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:55,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501635219] [2024-06-21 20:35:55,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501635219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:55,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:55,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:55,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799485878] [2024-06-21 20:35:55,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:55,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:55,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:55,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:55,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:55,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 531 transitions, 8558 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:55,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:55,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:55,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:57,445 INFO L124 PetriNetUnfolderBase]: 4605/7205 cut-off events. [2024-06-21 20:35:57,445 INFO L125 PetriNetUnfolderBase]: For 370759/370795 co-relation queries the response was YES. [2024-06-21 20:35:57,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60778 conditions, 7205 events. 4605/7205 cut-off events. For 370759/370795 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43615 event pairs, 757 based on Foata normal form. 28/7194 useless extension candidates. Maximal degree in co-relation 60678. Up to 3286 conditions per place. [2024-06-21 20:35:57,527 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 211 selfloop transitions, 360 changer transitions 0/581 dead transitions. [2024-06-21 20:35:57,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 581 transitions, 10290 flow [2024-06-21 20:35:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 20:35:57,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-21 20:35:57,528 INFO L175 Difference]: Start difference. First operand has 212 places, 531 transitions, 8558 flow. Second operand 9 states and 192 transitions. [2024-06-21 20:35:57,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 581 transitions, 10290 flow [2024-06-21 20:35:58,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 581 transitions, 10247 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 20:35:58,386 INFO L231 Difference]: Finished difference. Result has 219 places, 533 transitions, 9330 flow [2024-06-21 20:35:58,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8515, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9330, PETRI_PLACES=219, PETRI_TRANSITIONS=533} [2024-06-21 20:35:58,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 20:35:58,387 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 533 transitions, 9330 flow [2024-06-21 20:35:58,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:58,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:58,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:58,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:35:58,388 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:58,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -618933338, now seen corresponding path program 9 times [2024-06-21 20:35:58,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:58,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584858438] [2024-06-21 20:35:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:58,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:59,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584858438] [2024-06-21 20:35:59,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584858438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:59,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:59,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520381920] [2024-06-21 20:35:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:59,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:59,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:59,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:59,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:59,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 533 transitions, 9330 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:59,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:59,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:59,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:00,919 INFO L124 PetriNetUnfolderBase]: 4654/7288 cut-off events. [2024-06-21 20:36:00,919 INFO L125 PetriNetUnfolderBase]: For 391373/391402 co-relation queries the response was YES. [2024-06-21 20:36:00,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63502 conditions, 7288 events. 4654/7288 cut-off events. For 391373/391402 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44275 event pairs, 1601 based on Foata normal form. 15/7271 useless extension candidates. Maximal degree in co-relation 63399. Up to 6688 conditions per place. [2024-06-21 20:36:01,012 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 513 selfloop transitions, 63 changer transitions 0/586 dead transitions. [2024-06-21 20:36:01,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 586 transitions, 11165 flow [2024-06-21 20:36:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:36:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:36:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:36:01,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 20:36:01,013 INFO L175 Difference]: Start difference. First operand has 219 places, 533 transitions, 9330 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:36:01,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 586 transitions, 11165 flow [2024-06-21 20:36:01,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 586 transitions, 10734 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:01,957 INFO L231 Difference]: Finished difference. Result has 222 places, 551 transitions, 9578 flow [2024-06-21 20:36:01,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8917, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9578, PETRI_PLACES=222, PETRI_TRANSITIONS=551} [2024-06-21 20:36:01,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-21 20:36:01,958 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 551 transitions, 9578 flow [2024-06-21 20:36:01,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:01,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:01,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:36:01,959 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:01,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1848123656, now seen corresponding path program 10 times [2024-06-21 20:36:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442273069] [2024-06-21 20:36:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:02,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:02,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442273069] [2024-06-21 20:36:02,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442273069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:02,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:02,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:02,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060673136] [2024-06-21 20:36:02,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:02,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:02,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:02,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:02,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:02,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:02,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 551 transitions, 9578 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:02,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:02,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:02,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:04,635 INFO L124 PetriNetUnfolderBase]: 4626/7254 cut-off events. [2024-06-21 20:36:04,635 INFO L125 PetriNetUnfolderBase]: For 359258/359295 co-relation queries the response was YES. [2024-06-21 20:36:04,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62182 conditions, 7254 events. 4626/7254 cut-off events. For 359258/359295 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44060 event pairs, 1599 based on Foata normal form. 10/7230 useless extension candidates. Maximal degree in co-relation 62078. Up to 6681 conditions per place. [2024-06-21 20:36:04,733 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 504 selfloop transitions, 76 changer transitions 0/590 dead transitions. [2024-06-21 20:36:04,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 590 transitions, 10976 flow [2024-06-21 20:36:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:36:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:36:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:36:04,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 20:36:04,738 INFO L175 Difference]: Start difference. First operand has 222 places, 551 transitions, 9578 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:36:04,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 590 transitions, 10976 flow [2024-06-21 20:36:05,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 590 transitions, 10543 flow, removed 168 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:05,625 INFO L231 Difference]: Finished difference. Result has 225 places, 551 transitions, 9325 flow [2024-06-21 20:36:05,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9145, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9325, PETRI_PLACES=225, PETRI_TRANSITIONS=551} [2024-06-21 20:36:05,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 20:36:05,626 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 551 transitions, 9325 flow [2024-06-21 20:36:05,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:05,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:05,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:05,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:36:05,626 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 20:36:05,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:05,627 INFO L85 PathProgramCache]: Analyzing trace with hash -174247405, now seen corresponding path program 3 times [2024-06-21 20:36:05,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:05,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823093314] [2024-06-21 20:36:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:05,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:06,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:06,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823093314] [2024-06-21 20:36:06,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823093314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:06,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:06,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:36:06,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656592780] [2024-06-21 20:36:06,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:06,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:36:06,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:36:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:36:06,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:36:06,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 551 transitions, 9325 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:06,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:06,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:36:06,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:07,748 INFO L124 PetriNetUnfolderBase]: 5055/7789 cut-off events. [2024-06-21 20:36:07,749 INFO L125 PetriNetUnfolderBase]: For 366409/366503 co-relation queries the response was YES. [2024-06-21 20:36:07,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64966 conditions, 7789 events. 5055/7789 cut-off events. For 366409/366503 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45948 event pairs, 2023 based on Foata normal form. 41/7777 useless extension candidates. Maximal degree in co-relation 64860. Up to 7390 conditions per place. [2024-06-21 20:36:07,835 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 478 selfloop transitions, 12 changer transitions 0/559 dead transitions. [2024-06-21 20:36:07,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 559 transitions, 10331 flow [2024-06-21 20:36:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:36:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:36:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 20:36:07,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 20:36:07,836 INFO L175 Difference]: Start difference. First operand has 225 places, 551 transitions, 9325 flow. Second operand 6 states and 101 transitions. [2024-06-21 20:36:07,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 559 transitions, 10331 flow [2024-06-21 20:36:08,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 559 transitions, 9874 flow, removed 90 selfloop flow, removed 8 redundant places. [2024-06-21 20:36:08,599 INFO L231 Difference]: Finished difference. Result has 223 places, 551 transitions, 8898 flow [2024-06-21 20:36:08,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8868, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8898, PETRI_PLACES=223, PETRI_TRANSITIONS=551} [2024-06-21 20:36:08,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 20:36:08,600 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 551 transitions, 8898 flow [2024-06-21 20:36:08,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:08,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:08,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:08,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:36:08,600 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 20:36:08,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash -162456493, now seen corresponding path program 1 times [2024-06-21 20:36:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:08,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092200173] [2024-06-21 20:36:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:09,094 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 20:36:09,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:09,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092200173] [2024-06-21 20:36:09,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092200173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:09,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:09,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:36:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728306274] [2024-06-21 20:36:09,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:09,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:36:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:36:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:36:09,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:36:09,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 551 transitions, 8898 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:09,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:09,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:36:09,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:10,841 INFO L124 PetriNetUnfolderBase]: 5310/8052 cut-off events. [2024-06-21 20:36:10,841 INFO L125 PetriNetUnfolderBase]: For 367456/367456 co-relation queries the response was YES. [2024-06-21 20:36:10,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66638 conditions, 8052 events. 5310/8052 cut-off events. For 367456/367456 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45952 event pairs, 2093 based on Foata normal form. 1/8053 useless extension candidates. Maximal degree in co-relation 66531. Up to 7924 conditions per place. [2024-06-21 20:36:10,920 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 549 selfloop transitions, 17 changer transitions 0/569 dead transitions. [2024-06-21 20:36:10,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 569 transitions, 10224 flow [2024-06-21 20:36:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:36:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:36:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 20:36:10,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 20:36:10,921 INFO L175 Difference]: Start difference. First operand has 223 places, 551 transitions, 8898 flow. Second operand 6 states and 102 transitions. [2024-06-21 20:36:10,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 569 transitions, 10224 flow [2024-06-21 20:36:11,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 569 transitions, 10140 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:11,685 INFO L231 Difference]: Finished difference. Result has 224 places, 557 transitions, 8932 flow [2024-06-21 20:36:11,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8822, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8932, PETRI_PLACES=224, PETRI_TRANSITIONS=557} [2024-06-21 20:36:11,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 20:36:11,686 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 557 transitions, 8932 flow [2024-06-21 20:36:11,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:11,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:11,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:36:11,687 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 20:36:11,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:11,687 INFO L85 PathProgramCache]: Analyzing trace with hash 382062227, now seen corresponding path program 2 times [2024-06-21 20:36:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895983582] [2024-06-21 20:36:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:11,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:12,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895983582] [2024-06-21 20:36:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895983582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:12,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:12,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:36:12,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801979396] [2024-06-21 20:36:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:12,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:36:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:36:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:36:12,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:36:12,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 557 transitions, 8932 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:12,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:12,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:36:12,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:13,767 INFO L124 PetriNetUnfolderBase]: 5307/8049 cut-off events. [2024-06-21 20:36:13,768 INFO L125 PetriNetUnfolderBase]: For 374135/374137 co-relation queries the response was YES. [2024-06-21 20:36:13,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66593 conditions, 8049 events. 5307/8049 cut-off events. For 374135/374137 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45921 event pairs, 2096 based on Foata normal form. 3/8052 useless extension candidates. Maximal degree in co-relation 66485. Up to 7921 conditions per place. [2024-06-21 20:36:13,872 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 545 selfloop transitions, 17 changer transitions 0/565 dead transitions. [2024-06-21 20:36:13,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 565 transitions, 10082 flow [2024-06-21 20:36:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:36:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:36:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 20:36:13,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 20:36:13,878 INFO L175 Difference]: Start difference. First operand has 224 places, 557 transitions, 8932 flow. Second operand 6 states and 98 transitions. [2024-06-21 20:36:13,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 565 transitions, 10082 flow [2024-06-21 20:36:14,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 565 transitions, 10025 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 20:36:14,824 INFO L231 Difference]: Finished difference. Result has 228 places, 557 transitions, 8915 flow [2024-06-21 20:36:14,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8875, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8915, PETRI_PLACES=228, PETRI_TRANSITIONS=557} [2024-06-21 20:36:14,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 20:36:14,825 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 557 transitions, 8915 flow [2024-06-21 20:36:14,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:14,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:14,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:14,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:36:14,825 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:14,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:14,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1789014632, now seen corresponding path program 4 times [2024-06-21 20:36:14,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:14,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728077534] [2024-06-21 20:36:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:14,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:15,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:15,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728077534] [2024-06-21 20:36:15,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728077534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:15,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:15,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:15,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499445499] [2024-06-21 20:36:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:15,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:15,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:15,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:15,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 557 transitions, 8915 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:15,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:15,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:15,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:17,523 INFO L124 PetriNetUnfolderBase]: 4863/7623 cut-off events. [2024-06-21 20:36:17,524 INFO L125 PetriNetUnfolderBase]: For 437787/437819 co-relation queries the response was YES. [2024-06-21 20:36:17,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65177 conditions, 7623 events. 4863/7623 cut-off events. For 437787/437819 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46749 event pairs, 1109 based on Foata normal form. 36/7627 useless extension candidates. Maximal degree in co-relation 65067. Up to 5961 conditions per place. [2024-06-21 20:36:17,632 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 393 selfloop transitions, 213 changer transitions 0/618 dead transitions. [2024-06-21 20:36:17,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 618 transitions, 10719 flow [2024-06-21 20:36:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:36:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:36:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 20:36:17,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 20:36:17,653 INFO L175 Difference]: Start difference. First operand has 228 places, 557 transitions, 8915 flow. Second operand 10 states and 208 transitions. [2024-06-21 20:36:17,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 618 transitions, 10719 flow [2024-06-21 20:36:18,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 618 transitions, 10668 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:18,564 INFO L231 Difference]: Finished difference. Result has 232 places, 561 transitions, 9426 flow [2024-06-21 20:36:18,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8864, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9426, PETRI_PLACES=232, PETRI_TRANSITIONS=561} [2024-06-21 20:36:18,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 20:36:18,565 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 561 transitions, 9426 flow [2024-06-21 20:36:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:18,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:18,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:36:18,565 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:18,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1817610272, now seen corresponding path program 5 times [2024-06-21 20:36:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:18,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645191027] [2024-06-21 20:36:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:18,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:19,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645191027] [2024-06-21 20:36:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645191027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:19,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:19,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325920392] [2024-06-21 20:36:19,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:19,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:19,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 561 transitions, 9426 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:19,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:19,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:19,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:21,218 INFO L124 PetriNetUnfolderBase]: 4837/7561 cut-off events. [2024-06-21 20:36:21,219 INFO L125 PetriNetUnfolderBase]: For 445849/445881 co-relation queries the response was YES. [2024-06-21 20:36:21,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65392 conditions, 7561 events. 4837/7561 cut-off events. For 445849/445881 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46093 event pairs, 1123 based on Foata normal form. 42/7571 useless extension candidates. Maximal degree in co-relation 65282. Up to 6191 conditions per place. [2024-06-21 20:36:21,315 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 393 selfloop transitions, 206 changer transitions 0/611 dead transitions. [2024-06-21 20:36:21,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 611 transitions, 10904 flow [2024-06-21 20:36:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:36:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:36:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 20:36:21,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-21 20:36:21,317 INFO L175 Difference]: Start difference. First operand has 232 places, 561 transitions, 9426 flow. Second operand 10 states and 202 transitions. [2024-06-21 20:36:21,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 611 transitions, 10904 flow [2024-06-21 20:36:22,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 611 transitions, 10612 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:22,267 INFO L231 Difference]: Finished difference. Result has 236 places, 561 transitions, 9556 flow [2024-06-21 20:36:22,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9134, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9556, PETRI_PLACES=236, PETRI_TRANSITIONS=561} [2024-06-21 20:36:22,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 20:36:22,268 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 561 transitions, 9556 flow [2024-06-21 20:36:22,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:22,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:22,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:22,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:36:22,268 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:22,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash 906668760, now seen corresponding path program 6 times [2024-06-21 20:36:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:22,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398850763] [2024-06-21 20:36:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:23,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398850763] [2024-06-21 20:36:23,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398850763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:23,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:23,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:23,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560296010] [2024-06-21 20:36:23,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:23,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:23,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:23,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:23,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 561 transitions, 9556 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:23,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:23,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:23,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:25,197 INFO L124 PetriNetUnfolderBase]: 4924/7761 cut-off events. [2024-06-21 20:36:25,198 INFO L125 PetriNetUnfolderBase]: For 450421/450450 co-relation queries the response was YES. [2024-06-21 20:36:25,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66641 conditions, 7761 events. 4924/7761 cut-off events. For 450421/450450 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48017 event pairs, 1399 based on Foata normal form. 48/7783 useless extension candidates. Maximal degree in co-relation 66529. Up to 6180 conditions per place. [2024-06-21 20:36:25,297 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 356 selfloop transitions, 255 changer transitions 0/623 dead transitions. [2024-06-21 20:36:25,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 623 transitions, 11206 flow [2024-06-21 20:36:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:36:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:36:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-21 20:36:25,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-06-21 20:36:25,299 INFO L175 Difference]: Start difference. First operand has 236 places, 561 transitions, 9556 flow. Second operand 12 states and 241 transitions. [2024-06-21 20:36:25,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 623 transitions, 11206 flow [2024-06-21 20:36:26,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 623 transitions, 10765 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:36:26,448 INFO L231 Difference]: Finished difference. Result has 239 places, 564 transitions, 9747 flow [2024-06-21 20:36:26,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9129, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9747, PETRI_PLACES=239, PETRI_TRANSITIONS=564} [2024-06-21 20:36:26,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 20:36:26,450 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 564 transitions, 9747 flow [2024-06-21 20:36:26,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:26,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:26,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:26,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:36:26,451 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:26,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash 906665040, now seen corresponding path program 7 times [2024-06-21 20:36:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:26,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115966419] [2024-06-21 20:36:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:26,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:27,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115966419] [2024-06-21 20:36:27,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115966419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:27,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:27,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:27,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745509429] [2024-06-21 20:36:27,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:27,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:27,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:27,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:27,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:27,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 564 transitions, 9747 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:27,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:27,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:27,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:29,206 INFO L124 PetriNetUnfolderBase]: 5049/7967 cut-off events. [2024-06-21 20:36:29,207 INFO L125 PetriNetUnfolderBase]: For 466309/466338 co-relation queries the response was YES. [2024-06-21 20:36:29,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68864 conditions, 7967 events. 5049/7967 cut-off events. For 466309/466338 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 49559 event pairs, 1365 based on Foata normal form. 34/7975 useless extension candidates. Maximal degree in co-relation 68751. Up to 6047 conditions per place. [2024-06-21 20:36:29,309 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 348 selfloop transitions, 267 changer transitions 0/627 dead transitions. [2024-06-21 20:36:29,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 627 transitions, 11401 flow [2024-06-21 20:36:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:36:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:36:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-21 20:36:29,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-06-21 20:36:29,311 INFO L175 Difference]: Start difference. First operand has 239 places, 564 transitions, 9747 flow. Second operand 11 states and 228 transitions. [2024-06-21 20:36:29,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 627 transitions, 11401 flow [2024-06-21 20:36:30,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 627 transitions, 10995 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 20:36:30,368 INFO L231 Difference]: Finished difference. Result has 242 places, 566 transitions, 9967 flow [2024-06-21 20:36:30,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9341, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9967, PETRI_PLACES=242, PETRI_TRANSITIONS=566} [2024-06-21 20:36:30,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 20:36:30,369 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 566 transitions, 9967 flow [2024-06-21 20:36:30,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:30,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:30,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:30,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:36:30,370 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 20:36:30,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:30,370 INFO L85 PathProgramCache]: Analyzing trace with hash 206805459, now seen corresponding path program 1 times [2024-06-21 20:36:30,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:30,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518267398] [2024-06-21 20:36:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:30,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518267398] [2024-06-21 20:36:30,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518267398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:30,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:30,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:36:30,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163623812] [2024-06-21 20:36:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:30,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:36:30,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:36:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:36:30,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:36:30,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 566 transitions, 9967 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:30,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:30,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:36:30,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:32,668 INFO L124 PetriNetUnfolderBase]: 5868/8942 cut-off events. [2024-06-21 20:36:32,668 INFO L125 PetriNetUnfolderBase]: For 466344/466357 co-relation queries the response was YES. [2024-06-21 20:36:32,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76178 conditions, 8942 events. 5868/8942 cut-off events. For 466344/466357 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 52575 event pairs, 1971 based on Foata normal form. 14/8956 useless extension candidates. Maximal degree in co-relation 76064. Up to 8566 conditions per place. [2024-06-21 20:36:32,778 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 532 selfloop transitions, 74 changer transitions 0/609 dead transitions. [2024-06-21 20:36:32,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 609 transitions, 11716 flow [2024-06-21 20:36:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:36:32,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 20:36:32,780 INFO L175 Difference]: Start difference. First operand has 242 places, 566 transitions, 9967 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:36:32,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 609 transitions, 11716 flow [2024-06-21 20:36:33,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 609 transitions, 11152 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 20:36:33,962 INFO L231 Difference]: Finished difference. Result has 244 places, 584 transitions, 9930 flow [2024-06-21 20:36:33,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9411, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9930, PETRI_PLACES=244, PETRI_TRANSITIONS=584} [2024-06-21 20:36:33,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 20:36:33,963 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 584 transitions, 9930 flow [2024-06-21 20:36:33,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:33,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:33,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:33,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:36:33,963 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:33,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1055893046, now seen corresponding path program 8 times [2024-06-21 20:36:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751669911] [2024-06-21 20:36:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751669911] [2024-06-21 20:36:34,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751669911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:34,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:34,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473669019] [2024-06-21 20:36:34,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:34,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:35,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:35,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 584 transitions, 9930 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:35,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:35,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:35,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:37,089 INFO L124 PetriNetUnfolderBase]: 5402/8518 cut-off events. [2024-06-21 20:36:37,089 INFO L125 PetriNetUnfolderBase]: For 534170/534193 co-relation queries the response was YES. [2024-06-21 20:36:37,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74737 conditions, 8518 events. 5402/8518 cut-off events. For 534170/534193 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53751 event pairs, 1501 based on Foata normal form. 30/8528 useless extension candidates. Maximal degree in co-relation 74619. Up to 6785 conditions per place. [2024-06-21 20:36:37,199 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 439 selfloop transitions, 199 changer transitions 0/653 dead transitions. [2024-06-21 20:36:37,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 653 transitions, 11968 flow [2024-06-21 20:36:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:36:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:36:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 20:36:37,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-21 20:36:37,200 INFO L175 Difference]: Start difference. First operand has 244 places, 584 transitions, 9930 flow. Second operand 10 states and 213 transitions. [2024-06-21 20:36:37,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 653 transitions, 11968 flow [2024-06-21 20:36:38,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 653 transitions, 11889 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 20:36:38,558 INFO L231 Difference]: Finished difference. Result has 253 places, 596 transitions, 10597 flow [2024-06-21 20:36:38,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9851, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10597, PETRI_PLACES=253, PETRI_TRANSITIONS=596} [2024-06-21 20:36:38,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 20:36:38,559 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 596 transitions, 10597 flow [2024-06-21 20:36:38,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:38,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:38,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:38,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:36:38,560 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:38,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1055896766, now seen corresponding path program 9 times [2024-06-21 20:36:38,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:38,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272519323] [2024-06-21 20:36:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:38,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:39,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:39,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272519323] [2024-06-21 20:36:39,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272519323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:39,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:39,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:39,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982960892] [2024-06-21 20:36:39,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:39,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:39,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:39,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 596 transitions, 10597 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:39,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:39,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:39,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:41,735 INFO L124 PetriNetUnfolderBase]: 5543/8756 cut-off events. [2024-06-21 20:36:41,736 INFO L125 PetriNetUnfolderBase]: For 571789/571812 co-relation queries the response was YES. [2024-06-21 20:36:41,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77979 conditions, 8756 events. 5543/8756 cut-off events. For 571789/571812 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55672 event pairs, 1580 based on Foata normal form. 40/8776 useless extension candidates. Maximal degree in co-relation 77858. Up to 7431 conditions per place. [2024-06-21 20:36:41,857 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 449 selfloop transitions, 191 changer transitions 0/655 dead transitions. [2024-06-21 20:36:41,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 655 transitions, 12296 flow [2024-06-21 20:36:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:36:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:36:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-21 20:36:41,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-21 20:36:41,859 INFO L175 Difference]: Start difference. First operand has 253 places, 596 transitions, 10597 flow. Second operand 11 states and 225 transitions. [2024-06-21 20:36:41,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 655 transitions, 12296 flow [2024-06-21 20:36:43,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 655 transitions, 12031 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:43,245 INFO L231 Difference]: Finished difference. Result has 258 places, 598 transitions, 10817 flow [2024-06-21 20:36:43,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10334, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10817, PETRI_PLACES=258, PETRI_TRANSITIONS=598} [2024-06-21 20:36:43,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 20:36:43,246 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 598 transitions, 10817 flow [2024-06-21 20:36:43,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:43,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:43,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:43,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:36:43,246 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:43,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1061403296, now seen corresponding path program 10 times [2024-06-21 20:36:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:43,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691365623] [2024-06-21 20:36:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:44,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:44,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691365623] [2024-06-21 20:36:44,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691365623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:44,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:44,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:36:44,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029796256] [2024-06-21 20:36:44,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:44,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:36:44,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:44,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:36:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:36:44,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:44,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 598 transitions, 10817 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:44,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:44,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:44,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:46,490 INFO L124 PetriNetUnfolderBase]: 5565/8785 cut-off events. [2024-06-21 20:36:46,491 INFO L125 PetriNetUnfolderBase]: For 569576/569607 co-relation queries the response was YES. [2024-06-21 20:36:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78216 conditions, 8785 events. 5565/8785 cut-off events. For 569576/569607 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 55880 event pairs, 1590 based on Foata normal form. 44/8810 useless extension candidates. Maximal degree in co-relation 78093. Up to 7638 conditions per place. [2024-06-21 20:36:46,616 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 491 selfloop transitions, 144 changer transitions 0/650 dead transitions. [2024-06-21 20:36:46,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 650 transitions, 12416 flow [2024-06-21 20:36:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:36:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:36:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 20:36:46,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:36:46,618 INFO L175 Difference]: Start difference. First operand has 258 places, 598 transitions, 10817 flow. Second operand 11 states and 220 transitions. [2024-06-21 20:36:46,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 650 transitions, 12416 flow [2024-06-21 20:36:47,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 650 transitions, 12065 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:36:47,966 INFO L231 Difference]: Finished difference. Result has 261 places, 599 transitions, 10812 flow [2024-06-21 20:36:47,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10466, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10812, PETRI_PLACES=261, PETRI_TRANSITIONS=599} [2024-06-21 20:36:47,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 20:36:47,967 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 599 transitions, 10812 flow [2024-06-21 20:36:47,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:47,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:47,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:47,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:36:47,968 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 20:36:47,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -606753241, now seen corresponding path program 2 times [2024-06-21 20:36:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215647172] [2024-06-21 20:36:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:48,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:48,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215647172] [2024-06-21 20:36:48,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215647172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:48,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:48,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:36:48,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511294933] [2024-06-21 20:36:48,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:48,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:36:48,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:36:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:36:48,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:36:48,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 599 transitions, 10812 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:48,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:48,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:36:48,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:50,702 INFO L124 PetriNetUnfolderBase]: 6433/9846 cut-off events. [2024-06-21 20:36:50,703 INFO L125 PetriNetUnfolderBase]: For 554015/554024 co-relation queries the response was YES. [2024-06-21 20:36:50,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85261 conditions, 9846 events. 6433/9846 cut-off events. For 554015/554024 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 59525 event pairs, 2148 based on Foata normal form. 10/9856 useless extension candidates. Maximal degree in co-relation 85137. Up to 9447 conditions per place. [2024-06-21 20:36:50,836 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 555 selfloop transitions, 81 changer transitions 0/639 dead transitions. [2024-06-21 20:36:50,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 639 transitions, 12650 flow [2024-06-21 20:36:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:36:50,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:36:50,837 INFO L175 Difference]: Start difference. First operand has 261 places, 599 transitions, 10812 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:36:50,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 639 transitions, 12650 flow [2024-06-21 20:36:52,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 639 transitions, 12348 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 20:36:52,392 INFO L231 Difference]: Finished difference. Result has 262 places, 615 transitions, 10912 flow [2024-06-21 20:36:52,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10510, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10912, PETRI_PLACES=262, PETRI_TRANSITIONS=615} [2024-06-21 20:36:52,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 20:36:52,393 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 615 transitions, 10912 flow [2024-06-21 20:36:52,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:52,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:52,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:52,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:36:52,394 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 20:36:52,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash -14746861, now seen corresponding path program 3 times [2024-06-21 20:36:52,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:52,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111820842] [2024-06-21 20:36:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:52,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:52,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:52,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111820842] [2024-06-21 20:36:52,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111820842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:52,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:52,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:36:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547118073] [2024-06-21 20:36:52,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:36:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:36:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:36:53,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:36:53,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 615 transitions, 10912 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:53,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:53,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:36:53,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:55,045 INFO L124 PetriNetUnfolderBase]: 6429/9844 cut-off events. [2024-06-21 20:36:55,046 INFO L125 PetriNetUnfolderBase]: For 562197/562212 co-relation queries the response was YES. [2024-06-21 20:36:55,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84822 conditions, 9844 events. 6429/9844 cut-off events. For 562197/562212 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 59495 event pairs, 2134 based on Foata normal form. 14/9858 useless extension candidates. Maximal degree in co-relation 84696. Up to 9445 conditions per place. [2024-06-21 20:36:55,181 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 553 selfloop transitions, 79 changer transitions 0/635 dead transitions. [2024-06-21 20:36:55,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 635 transitions, 12448 flow [2024-06-21 20:36:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:36:55,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 20:36:55,182 INFO L175 Difference]: Start difference. First operand has 262 places, 615 transitions, 10912 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:36:55,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 635 transitions, 12448 flow [2024-06-21 20:36:56,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 635 transitions, 12328 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:36:56,640 INFO L231 Difference]: Finished difference. Result has 267 places, 615 transitions, 10958 flow [2024-06-21 20:36:56,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10792, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10958, PETRI_PLACES=267, PETRI_TRANSITIONS=615} [2024-06-21 20:36:56,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 20:36:56,641 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 615 transitions, 10958 flow [2024-06-21 20:36:56,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:56,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:56,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:56,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:36:56,642 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:56,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash 981167380, now seen corresponding path program 11 times [2024-06-21 20:36:56,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:56,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069204225] [2024-06-21 20:36:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:56,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:57,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:57,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069204225] [2024-06-21 20:36:57,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069204225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:57,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:57,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:57,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571363275] [2024-06-21 20:36:57,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:57,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:57,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 615 transitions, 10958 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:57,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:57,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:57,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:59,627 INFO L124 PetriNetUnfolderBase]: 5942/9375 cut-off events. [2024-06-21 20:36:59,627 INFO L125 PetriNetUnfolderBase]: For 631335/631367 co-relation queries the response was YES. [2024-06-21 20:36:59,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82644 conditions, 9375 events. 5942/9375 cut-off events. For 631335/631367 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 60422 event pairs, 1420 based on Foata normal form. 42/9385 useless extension candidates. Maximal degree in co-relation 82517. Up to 7004 conditions per place. [2024-06-21 20:36:59,758 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 367 changer transitions 0/689 dead transitions. [2024-06-21 20:36:59,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 689 transitions, 13384 flow [2024-06-21 20:36:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:36:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:36:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:36:59,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 20:36:59,759 INFO L175 Difference]: Start difference. First operand has 267 places, 615 transitions, 10958 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:36:59,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 689 transitions, 13384 flow [2024-06-21 20:37:01,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 689 transitions, 13235 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:01,580 INFO L231 Difference]: Finished difference. Result has 273 places, 641 transitions, 12078 flow [2024-06-21 20:37:01,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10809, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12078, PETRI_PLACES=273, PETRI_TRANSITIONS=641} [2024-06-21 20:37:01,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 20:37:01,581 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 641 transitions, 12078 flow [2024-06-21 20:37:01,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:01,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:01,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:01,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:37:01,582 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:01,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash 981163660, now seen corresponding path program 12 times [2024-06-21 20:37:01,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:01,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471919979] [2024-06-21 20:37:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:01,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:02,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:02,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471919979] [2024-06-21 20:37:02,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471919979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:02,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:02,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901159308] [2024-06-21 20:37:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:02,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:02,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:02,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:02,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 641 transitions, 12078 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:02,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:02,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:02,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:05,296 INFO L124 PetriNetUnfolderBase]: 6404/10136 cut-off events. [2024-06-21 20:37:05,297 INFO L125 PetriNetUnfolderBase]: For 748172/748206 co-relation queries the response was YES. [2024-06-21 20:37:05,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92533 conditions, 10136 events. 6404/10136 cut-off events. For 748172/748206 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 66744 event pairs, 1311 based on Foata normal form. 44/10142 useless extension candidates. Maximal degree in co-relation 92404. Up to 6381 conditions per place. [2024-06-21 20:37:05,424 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 278 selfloop transitions, 407 changer transitions 0/704 dead transitions. [2024-06-21 20:37:05,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 704 transitions, 14218 flow [2024-06-21 20:37:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 20:37:05,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2024-06-21 20:37:05,426 INFO L175 Difference]: Start difference. First operand has 273 places, 641 transitions, 12078 flow. Second operand 10 states and 211 transitions. [2024-06-21 20:37:05,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 704 transitions, 14218 flow [2024-06-21 20:37:07,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 704 transitions, 13744 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:07,388 INFO L231 Difference]: Finished difference. Result has 279 places, 648 transitions, 12790 flow [2024-06-21 20:37:07,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11608, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12790, PETRI_PLACES=279, PETRI_TRANSITIONS=648} [2024-06-21 20:37:07,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 20:37:07,389 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 648 transitions, 12790 flow [2024-06-21 20:37:07,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:07,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:07,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:07,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:37:07,389 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1068003340, now seen corresponding path program 13 times [2024-06-21 20:37:07,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:07,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605687664] [2024-06-21 20:37:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:08,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:08,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605687664] [2024-06-21 20:37:08,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605687664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:08,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:08,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:08,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45766658] [2024-06-21 20:37:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:08,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:08,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 648 transitions, 12790 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:08,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:08,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:08,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:10,831 INFO L124 PetriNetUnfolderBase]: 6760/10754 cut-off events. [2024-06-21 20:37:10,831 INFO L125 PetriNetUnfolderBase]: For 764664/764695 co-relation queries the response was YES. [2024-06-21 20:37:10,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97889 conditions, 10754 events. 6760/10754 cut-off events. For 764664/764695 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 72164 event pairs, 2002 based on Foata normal form. 50/10785 useless extension candidates. Maximal degree in co-relation 97759. Up to 9115 conditions per place. [2024-06-21 20:37:11,025 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 508 selfloop transitions, 189 changer transitions 0/716 dead transitions. [2024-06-21 20:37:11,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 716 transitions, 15187 flow [2024-06-21 20:37:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:37:11,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 20:37:11,027 INFO L175 Difference]: Start difference. First operand has 279 places, 648 transitions, 12790 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:37:11,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 716 transitions, 15187 flow [2024-06-21 20:37:13,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 716 transitions, 14655 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:13,331 INFO L231 Difference]: Finished difference. Result has 282 places, 674 transitions, 13307 flow [2024-06-21 20:37:13,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12285, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13307, PETRI_PLACES=282, PETRI_TRANSITIONS=674} [2024-06-21 20:37:13,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 20:37:13,332 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 674 transitions, 13307 flow [2024-06-21 20:37:13,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:13,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:13,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:13,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:37:13,334 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:13,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash -324832996, now seen corresponding path program 14 times [2024-06-21 20:37:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:13,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985280840] [2024-06-21 20:37:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:14,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:14,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985280840] [2024-06-21 20:37:14,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985280840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:14,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:14,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825153653] [2024-06-21 20:37:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:14,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:14,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:14,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:14,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 674 transitions, 13307 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:14,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:14,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:14,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:16,876 INFO L124 PetriNetUnfolderBase]: 6660/10596 cut-off events. [2024-06-21 20:37:16,876 INFO L125 PetriNetUnfolderBase]: For 707459/707490 co-relation queries the response was YES. [2024-06-21 20:37:16,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94370 conditions, 10596 events. 6660/10596 cut-off events. For 707459/707490 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 70955 event pairs, 1875 based on Foata normal form. 62/10629 useless extension candidates. Maximal degree in co-relation 94238. Up to 8333 conditions per place. [2024-06-21 20:37:17,047 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 472 selfloop transitions, 228 changer transitions 0/719 dead transitions. [2024-06-21 20:37:17,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 719 transitions, 14979 flow [2024-06-21 20:37:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 20:37:17,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 20:37:17,048 INFO L175 Difference]: Start difference. First operand has 282 places, 674 transitions, 13307 flow. Second operand 10 states and 199 transitions. [2024-06-21 20:37:17,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 719 transitions, 14979 flow [2024-06-21 20:37:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 719 transitions, 14688 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:19,409 INFO L231 Difference]: Finished difference. Result has 287 places, 674 transitions, 13517 flow [2024-06-21 20:37:19,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13016, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13517, PETRI_PLACES=287, PETRI_TRANSITIONS=674} [2024-06-21 20:37:19,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 20:37:19,410 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 674 transitions, 13517 flow [2024-06-21 20:37:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:19,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:19,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:37:19,411 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 20:37:19,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1118129427, now seen corresponding path program 4 times [2024-06-21 20:37:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:19,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291709482] [2024-06-21 20:37:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:20,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:20,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291709482] [2024-06-21 20:37:20,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291709482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:20,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:20,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143476222] [2024-06-21 20:37:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:20,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:37:20,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 674 transitions, 13517 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 20:37:20,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:20,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:37:20,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:22,825 INFO L124 PetriNetUnfolderBase]: 7803/12032 cut-off events. [2024-06-21 20:37:22,826 INFO L125 PetriNetUnfolderBase]: For 669194/669203 co-relation queries the response was YES. [2024-06-21 20:37:22,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104627 conditions, 12032 events. 7803/12032 cut-off events. For 669194/669203 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 76662 event pairs, 2631 based on Foata normal form. 10/12042 useless extension candidates. Maximal degree in co-relation 104494. Up to 11626 conditions per place. [2024-06-21 20:37:23,295 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 602 selfloop transitions, 94 changer transitions 0/699 dead transitions. [2024-06-21 20:37:23,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 699 transitions, 15261 flow [2024-06-21 20:37:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:37:23,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 20:37:23,299 INFO L175 Difference]: Start difference. First operand has 287 places, 674 transitions, 13517 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:37:23,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 699 transitions, 15261 flow [2024-06-21 20:37:25,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 699 transitions, 14668 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 20:37:25,608 INFO L231 Difference]: Finished difference. Result has 285 places, 678 transitions, 13198 flow [2024-06-21 20:37:25,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12928, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13198, PETRI_PLACES=285, PETRI_TRANSITIONS=678} [2024-06-21 20:37:25,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 20:37:25,609 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 678 transitions, 13198 flow [2024-06-21 20:37:25,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 20:37:25,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:25,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:37:25,609 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:25,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1045777742, now seen corresponding path program 15 times [2024-06-21 20:37:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382791282] [2024-06-21 20:37:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:26,554 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 20:37:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382791282] [2024-06-21 20:37:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382791282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:26,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:26,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:26,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781219003] [2024-06-21 20:37:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:26,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:26,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:26,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 678 transitions, 13198 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:26,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:26,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:26,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:29,849 INFO L124 PetriNetUnfolderBase]: 7139/11375 cut-off events. [2024-06-21 20:37:29,850 INFO L125 PetriNetUnfolderBase]: For 755779/755795 co-relation queries the response was YES. [2024-06-21 20:37:29,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100902 conditions, 11375 events. 7139/11375 cut-off events. For 755779/755795 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 77100 event pairs, 1477 based on Foata normal form. 40/11402 useless extension candidates. Maximal degree in co-relation 100769. Up to 7914 conditions per place. [2024-06-21 20:37:30,111 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 367 selfloop transitions, 355 changer transitions 0/742 dead transitions. [2024-06-21 20:37:30,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 742 transitions, 15848 flow [2024-06-21 20:37:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 20:37:30,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-21 20:37:30,113 INFO L175 Difference]: Start difference. First operand has 285 places, 678 transitions, 13198 flow. Second operand 9 states and 199 transitions. [2024-06-21 20:37:30,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 742 transitions, 15848 flow [2024-06-21 20:37:32,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 742 transitions, 15718 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:32,122 INFO L231 Difference]: Finished difference. Result has 291 places, 687 transitions, 14274 flow [2024-06-21 20:37:32,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13080, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14274, PETRI_PLACES=291, PETRI_TRANSITIONS=687} [2024-06-21 20:37:32,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 20:37:32,132 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 687 transitions, 14274 flow [2024-06-21 20:37:32,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:32,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:32,132 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 20:37:32,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:37:32,133 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 20:37:32,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:32,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1011610176, now seen corresponding path program 1 times [2024-06-21 20:37:32,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:32,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15590442] [2024-06-21 20:37:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:32,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:32,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:32,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15590442] [2024-06-21 20:37:32,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15590442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:32,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:32,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:32,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832057315] [2024-06-21 20:37:32,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:32,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:32,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:32,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:37:32,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 687 transitions, 14274 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:32,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:32,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:37:32,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:36,471 INFO L124 PetriNetUnfolderBase]: 8425/13018 cut-off events. [2024-06-21 20:37:36,471 INFO L125 PetriNetUnfolderBase]: For 751265/751274 co-relation queries the response was YES. [2024-06-21 20:37:36,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114522 conditions, 13018 events. 8425/13018 cut-off events. For 751265/751274 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 84620 event pairs, 2825 based on Foata normal form. 14/13032 useless extension candidates. Maximal degree in co-relation 114388. Up to 12401 conditions per place. [2024-06-21 20:37:36,668 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 650 selfloop transitions, 94 changer transitions 0/747 dead transitions. [2024-06-21 20:37:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 747 transitions, 16647 flow [2024-06-21 20:37:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:37:36,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 20:37:36,670 INFO L175 Difference]: Start difference. First operand has 291 places, 687 transitions, 14274 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:37:36,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 747 transitions, 16647 flow [2024-06-21 20:37:39,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 747 transitions, 16094 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:39,437 INFO L231 Difference]: Finished difference. Result has 298 places, 707 transitions, 14296 flow [2024-06-21 20:37:39,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13729, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14296, PETRI_PLACES=298, PETRI_TRANSITIONS=707} [2024-06-21 20:37:39,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 20:37:39,438 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 707 transitions, 14296 flow [2024-06-21 20:37:39,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:39,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:39,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:39,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:37:39,438 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:39,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:39,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1045774022, now seen corresponding path program 16 times [2024-06-21 20:37:39,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:39,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101703054] [2024-06-21 20:37:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:39,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101703054] [2024-06-21 20:37:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101703054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:40,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:40,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291867457] [2024-06-21 20:37:40,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:40,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:40,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:40,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 707 transitions, 14296 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:40,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:40,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:40,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:43,869 INFO L124 PetriNetUnfolderBase]: 7602/12088 cut-off events. [2024-06-21 20:37:43,869 INFO L125 PetriNetUnfolderBase]: For 796973/796995 co-relation queries the response was YES. [2024-06-21 20:37:43,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109537 conditions, 12088 events. 7602/12088 cut-off events. For 796973/796995 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 83282 event pairs, 1961 based on Foata normal form. 48/12111 useless extension candidates. Maximal degree in co-relation 109398. Up to 10065 conditions per place. [2024-06-21 20:37:44,027 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 316 changer transitions 0/763 dead transitions. [2024-06-21 20:37:44,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 763 transitions, 16627 flow [2024-06-21 20:37:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 20:37:44,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-21 20:37:44,029 INFO L175 Difference]: Start difference. First operand has 298 places, 707 transitions, 14296 flow. Second operand 9 states and 194 transitions. [2024-06-21 20:37:44,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 763 transitions, 16627 flow [2024-06-21 20:37:46,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 763 transitions, 16552 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 20:37:46,174 INFO L231 Difference]: Finished difference. Result has 305 places, 712 transitions, 15059 flow [2024-06-21 20:37:46,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14221, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15059, PETRI_PLACES=305, PETRI_TRANSITIONS=712} [2024-06-21 20:37:46,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 20:37:46,175 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 712 transitions, 15059 flow [2024-06-21 20:37:46,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:46,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:46,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:46,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:37:46,176 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:46,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash -967483630, now seen corresponding path program 17 times [2024-06-21 20:37:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670048603] [2024-06-21 20:37:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670048603] [2024-06-21 20:37:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670048603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:47,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:47,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140917249] [2024-06-21 20:37:47,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:47,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:47,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:47,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:47,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 712 transitions, 15059 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:47,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:47,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:47,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:50,918 INFO L124 PetriNetUnfolderBase]: 7952/12691 cut-off events. [2024-06-21 20:37:50,919 INFO L125 PetriNetUnfolderBase]: For 904134/904165 co-relation queries the response was YES. [2024-06-21 20:37:51,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115806 conditions, 12691 events. 7952/12691 cut-off events. For 904134/904165 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 88733 event pairs, 2323 based on Foata normal form. 92/12764 useless extension candidates. Maximal degree in co-relation 115664. Up to 10722 conditions per place. [2024-06-21 20:37:51,102 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 555 selfloop transitions, 192 changer transitions 0/767 dead transitions. [2024-06-21 20:37:51,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 767 transitions, 17162 flow [2024-06-21 20:37:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 20:37:51,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 20:37:51,104 INFO L175 Difference]: Start difference. First operand has 305 places, 712 transitions, 15059 flow. Second operand 10 states and 199 transitions. [2024-06-21 20:37:51,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 767 transitions, 17162 flow [2024-06-21 20:37:53,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 767 transitions, 16495 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:53,818 INFO L231 Difference]: Finished difference. Result has 308 places, 719 transitions, 15124 flow [2024-06-21 20:37:53,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14392, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15124, PETRI_PLACES=308, PETRI_TRANSITIONS=719} [2024-06-21 20:37:53,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 20:37:53,820 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 719 transitions, 15124 flow [2024-06-21 20:37:53,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:53,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:53,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:53,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:37:53,820 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:53,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash -972846010, now seen corresponding path program 18 times [2024-06-21 20:37:53,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:53,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837657880] [2024-06-21 20:37:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:53,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:54,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:54,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837657880] [2024-06-21 20:37:54,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837657880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:54,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:54,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:54,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671257131] [2024-06-21 20:37:54,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:54,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:54,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:54,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:54,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:54,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:54,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 719 transitions, 15124 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:54,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:54,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:54,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:58,608 INFO L124 PetriNetUnfolderBase]: 8218/13122 cut-off events. [2024-06-21 20:37:58,608 INFO L125 PetriNetUnfolderBase]: For 915377/915401 co-relation queries the response was YES. [2024-06-21 20:37:58,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119285 conditions, 13122 events. 8218/13122 cut-off events. For 915377/915401 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 92637 event pairs, 2399 based on Foata normal form. 70/13169 useless extension candidates. Maximal degree in co-relation 119142. Up to 11295 conditions per place. [2024-06-21 20:37:58,789 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 556 selfloop transitions, 193 changer transitions 0/769 dead transitions. [2024-06-21 20:37:58,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 769 transitions, 17112 flow [2024-06-21 20:37:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:37:58,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-21 20:37:58,791 INFO L175 Difference]: Start difference. First operand has 308 places, 719 transitions, 15124 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:37:58,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 769 transitions, 17112 flow [2024-06-21 20:38:01,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 769 transitions, 16644 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:01,714 INFO L231 Difference]: Finished difference. Result has 309 places, 724 transitions, 15295 flow [2024-06-21 20:38:01,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14656, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15295, PETRI_PLACES=309, PETRI_TRANSITIONS=724} [2024-06-21 20:38:01,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 20:38:01,715 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 724 transitions, 15295 flow [2024-06-21 20:38:01,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:01,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:01,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:01,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:38:01,716 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 20:38:01,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1117801137, now seen corresponding path program 5 times [2024-06-21 20:38:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:01,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356507283] [2024-06-21 20:38:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:01,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:02,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:02,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356507283] [2024-06-21 20:38:02,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356507283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:02,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009443330] [2024-06-21 20:38:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:02,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:02,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:38:02,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 724 transitions, 15295 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 20:38:02,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:02,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:38:02,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:06,374 INFO L124 PetriNetUnfolderBase]: 9531/14818 cut-off events. [2024-06-21 20:38:06,374 INFO L125 PetriNetUnfolderBase]: For 826650/826665 co-relation queries the response was YES. [2024-06-21 20:38:06,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129994 conditions, 14818 events. 9531/14818 cut-off events. For 826650/826665 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 99972 event pairs, 3315 based on Foata normal form. 14/14832 useless extension candidates. Maximal degree in co-relation 129850. Up to 14399 conditions per place. [2024-06-21 20:38:06,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 655 selfloop transitions, 90 changer transitions 0/748 dead transitions. [2024-06-21 20:38:06,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 748 transitions, 17205 flow [2024-06-21 20:38:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 20:38:06,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 20:38:06,786 INFO L175 Difference]: Start difference. First operand has 309 places, 724 transitions, 15295 flow. Second operand 7 states and 124 transitions. [2024-06-21 20:38:06,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 748 transitions, 17205 flow [2024-06-21 20:38:10,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 748 transitions, 16782 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:10,269 INFO L231 Difference]: Finished difference. Result has 311 places, 732 transitions, 15255 flow [2024-06-21 20:38:10,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14872, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15255, PETRI_PLACES=311, PETRI_TRANSITIONS=732} [2024-06-21 20:38:10,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 20:38:10,270 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 732 transitions, 15255 flow [2024-06-21 20:38:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 20:38:10,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:10,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:10,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:38:10,271 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:10,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2006847629, now seen corresponding path program 1 times [2024-06-21 20:38:10,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:10,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488731095] [2024-06-21 20:38:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:10,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:11,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:11,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488731095] [2024-06-21 20:38:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488731095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:11,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:11,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114397742] [2024-06-21 20:38:11,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:11,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:11,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:11,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:38:11,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 732 transitions, 15255 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:11,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:11,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:38:11,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:15,353 INFO L124 PetriNetUnfolderBase]: 9462/14784 cut-off events. [2024-06-21 20:38:15,354 INFO L125 PetriNetUnfolderBase]: For 868917/868930 co-relation queries the response was YES. [2024-06-21 20:38:15,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129711 conditions, 14784 events. 9462/14784 cut-off events. For 868917/868930 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 100856 event pairs, 4284 based on Foata normal form. 6/14748 useless extension candidates. Maximal degree in co-relation 129565. Up to 14385 conditions per place. [2024-06-21 20:38:15,554 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 715 selfloop transitions, 38 changer transitions 0/773 dead transitions. [2024-06-21 20:38:15,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 773 transitions, 17140 flow [2024-06-21 20:38:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 20:38:15,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 20:38:15,555 INFO L175 Difference]: Start difference. First operand has 311 places, 732 transitions, 15255 flow. Second operand 9 states and 160 transitions. [2024-06-21 20:38:15,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 773 transitions, 17140 flow [2024-06-21 20:38:19,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 773 transitions, 17011 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:19,242 INFO L231 Difference]: Finished difference. Result has 317 places, 740 transitions, 15429 flow [2024-06-21 20:38:19,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15126, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15429, PETRI_PLACES=317, PETRI_TRANSITIONS=740} [2024-06-21 20:38:19,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 20:38:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 740 transitions, 15429 flow [2024-06-21 20:38:19,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:19,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:19,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:38:19,243 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:19,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1457475153, now seen corresponding path program 2 times [2024-06-21 20:38:19,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:19,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492978164] [2024-06-21 20:38:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:19,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:20,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:20,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492978164] [2024-06-21 20:38:20,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492978164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:20,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:20,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113012443] [2024-06-21 20:38:20,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:20,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:38:20,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 740 transitions, 15429 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:20,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:20,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:38:20,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:24,660 INFO L124 PetriNetUnfolderBase]: 9490/14831 cut-off events. [2024-06-21 20:38:24,660 INFO L125 PetriNetUnfolderBase]: For 879096/879109 co-relation queries the response was YES. [2024-06-21 20:38:24,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131103 conditions, 14831 events. 9490/14831 cut-off events. For 879096/879109 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 101303 event pairs, 4233 based on Foata normal form. 6/14795 useless extension candidates. Maximal degree in co-relation 130956. Up to 14376 conditions per place. [2024-06-21 20:38:24,848 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 707 selfloop transitions, 55 changer transitions 0/782 dead transitions. [2024-06-21 20:38:24,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 782 transitions, 17354 flow [2024-06-21 20:38:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:38:24,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:38:24,850 INFO L175 Difference]: Start difference. First operand has 317 places, 740 transitions, 15429 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:38:24,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 782 transitions, 17354 flow [2024-06-21 20:38:28,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 782 transitions, 17163 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:28,274 INFO L231 Difference]: Finished difference. Result has 321 places, 748 transitions, 15567 flow [2024-06-21 20:38:28,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15238, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15567, PETRI_PLACES=321, PETRI_TRANSITIONS=748} [2024-06-21 20:38:28,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 20:38:28,276 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 748 transitions, 15567 flow [2024-06-21 20:38:28,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:28,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:28,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:28,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:38:28,276 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:28,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 189235912, now seen corresponding path program 1 times [2024-06-21 20:38:28,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:28,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127670789] [2024-06-21 20:38:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:28,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127670789] [2024-06-21 20:38:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127670789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923717471] [2024-06-21 20:38:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:29,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 20:38:29,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 748 transitions, 15567 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:29,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:29,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 20:38:29,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand