./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix008_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.2024-05-21_14-57-05.files/protection/mix008_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix008_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix008_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-bcb38a6-m [2024-06-04 14:38:05,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:38:06,015 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:38:06,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:38:06,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:38:06,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:38:06,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:38:06,049 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:38:06,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:38:06,052 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:38:06,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:38:06,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:38:06,053 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:38:06,054 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:38:06,055 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:38:06,055 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:38:06,055 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:38:06,055 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:38:06,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:38:06,056 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:38:06,057 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:38:06,057 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:38:06,057 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:38:06,057 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:38:06,057 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:38:06,058 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:38:06,058 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:38:06,058 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:38:06,059 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:38:06,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:38:06,060 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:38:06,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:38:06,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:38:06,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:38:06,060 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:38:06,060 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:38:06,061 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:38:06,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:38:06,061 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:38:06,061 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:38:06,061 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:38:06,061 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:38:06,062 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:38:06,062 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:38:06,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:38:06,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:38:06,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:38:06,303 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:38:06,304 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:38:06,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix008_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-04 14:38:06,520 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:38:06,521 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:38:06,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix008_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:38:07,519 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:38:07,765 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:38:07,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix008_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:38:07,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34ac16ce3/76dde4b47a4f45b297ce5878c18383b7/FLAG7256cef02 [2024-06-04 14:38:07,789 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34ac16ce3/76dde4b47a4f45b297ce5878c18383b7 [2024-06-04 14:38:07,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:38:07,791 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:38:07,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:38:07,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:38:07,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:38:07,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:38:06" (1/2) ... [2024-06-04 14:38:07,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160253be and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:07, skipping insertion in model container [2024-06-04 14:38:07,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:38:06" (1/2) ... [2024-06-04 14:38:07,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@44c0f17e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:38:07, skipping insertion in model container [2024-06-04 14:38:07,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:38:07" (2/2) ... [2024-06-04 14:38:07,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160253be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:07, skipping insertion in model container [2024-06-04 14:38:07,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:38:07" (2/2) ... [2024-06-04 14:38:07,803 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:38:07,947 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:38:07,948 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 14:38:07,948 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 14:38:07,949 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 14:38:07,949 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-04 14:38:07,949 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:38:07,949 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-04 14:38:07,982 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:38:08,359 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:38:08,372 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:38:08,502 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:38:08,540 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:38:08,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08 WrapperNode [2024-06-04 14:38:08,541 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:38:08,542 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:38:08,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:38:08,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:38:08,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,615 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-04 14:38:08,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:38:08,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:38:08,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:38:08,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:38:08,629 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,640 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,656 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 14:38:08,661 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,671 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,688 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:38:08,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:38:08,694 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:38:08,694 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:38:08,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (1/1) ... [2024-06-04 14:38:08,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:38:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:38:08,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 14:38:08,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 14:38:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:38:08,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:38:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:38:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:38:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:38:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:38:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:38:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:38:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:38:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:38:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:38:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:38:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:38:08,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:38:08,774 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:38:08,898 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:38:08,900 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:38:09,259 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:38:09,260 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:38:09,508 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:38:09,508 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:38:09,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:38:09 BoogieIcfgContainer [2024-06-04 14:38:09,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:38:09,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:38:09,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:38:09,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:38:09,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:38:06" (1/4) ... [2024-06-04 14:38:09,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ea1d63 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:38:09, skipping insertion in model container [2024-06-04 14:38:09,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:38:07" (2/4) ... [2024-06-04 14:38:09,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ea1d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:38:09, skipping insertion in model container [2024-06-04 14:38:09,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:38:08" (3/4) ... [2024-06-04 14:38:09,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ea1d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:38:09, skipping insertion in model container [2024-06-04 14:38:09,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:38:09" (4/4) ... [2024-06-04 14:38:09,517 INFO L112 eAbstractionObserver]: Analyzing ICFG mix008_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:38:09,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:38:09,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:38:09,531 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:38:09,583 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:38:09,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:38:09,646 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-04 14:38:09,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:38:09,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:38:09,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:38:09,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-04 14:38:09,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:38:09,670 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;@7af8353b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:38:09,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:38:09,674 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:38:09,675 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:38:09,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:38:09,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:09,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:38:09,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:09,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash -273717453, now seen corresponding path program 1 times [2024-06-04 14:38:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:09,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973273138] [2024-06-04 14:38:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:10,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:10,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973273138] [2024-06-04 14:38:10,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973273138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:10,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:10,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:38:10,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006026950] [2024-06-04 14:38:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:10,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:38:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:38:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:38:10,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:10,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:10,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:10,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:10,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:12,621 INFO L124 PetriNetUnfolderBase]: 11639/16286 cut-off events. [2024-06-04 14:38:12,621 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-06-04 14:38:12,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32504 conditions, 16286 events. 11639/16286 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 91836 event pairs, 9112 based on Foata normal form. 1/15975 useless extension candidates. Maximal degree in co-relation 32488. Up to 15753 conditions per place. [2024-06-04 14:38:12,714 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 46 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-04 14:38:12,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 239 flow [2024-06-04 14:38:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:38:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:38:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-04 14:38:12,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2024-06-04 14:38:12,725 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 97 transitions. [2024-06-04 14:38:12,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 239 flow [2024-06-04 14:38:12,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:12,733 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-04 14:38:12,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-04 14:38:12,736 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-04 14:38:12,737 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-04 14:38:12,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:12,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:12,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:12,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:38:12,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:12,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1049413550, now seen corresponding path program 1 times [2024-06-04 14:38:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:12,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623992371] [2024-06-04 14:38:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:13,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:13,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623992371] [2024-06-04 14:38:13,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623992371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:13,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:13,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:38:13,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471233863] [2024-06-04 14:38:13,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:38:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:38:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:38:13,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:13,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:13,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:13,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:13,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:15,258 INFO L124 PetriNetUnfolderBase]: 11629/16272 cut-off events. [2024-06-04 14:38:15,258 INFO L125 PetriNetUnfolderBase]: For 3010/3010 co-relation queries the response was YES. [2024-06-04 14:38:15,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36483 conditions, 16272 events. 11629/16272 cut-off events. For 3010/3010 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 91724 event pairs, 8311 based on Foata normal form. 4/16183 useless extension candidates. Maximal degree in co-relation 36468. Up to 15718 conditions per place. [2024-06-04 14:38:15,331 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 56 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-04 14:38:15,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 331 flow [2024-06-04 14:38:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:38:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:38:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-04 14:38:15,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-06-04 14:38:15,333 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 125 transitions. [2024-06-04 14:38:15,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 331 flow [2024-06-04 14:38:15,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:38:15,335 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-04 14:38:15,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-04 14:38:15,336 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-04 14:38:15,336 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-04 14:38:15,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:15,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:15,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:15,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:38:15,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:15,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1827920058, now seen corresponding path program 1 times [2024-06-04 14:38:15,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:15,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682902133] [2024-06-04 14:38:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:15,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:16,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:16,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682902133] [2024-06-04 14:38:16,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682902133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:16,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:16,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:38:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112027818] [2024-06-04 14:38:16,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:16,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:38:16,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:38:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:38:16,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:16,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:16,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:16,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:16,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:17,773 INFO L124 PetriNetUnfolderBase]: 11647/16408 cut-off events. [2024-06-04 14:38:17,774 INFO L125 PetriNetUnfolderBase]: For 8616/8616 co-relation queries the response was YES. [2024-06-04 14:38:17,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40643 conditions, 16408 events. 11647/16408 cut-off events. For 8616/8616 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 93342 event pairs, 6983 based on Foata normal form. 7/16338 useless extension candidates. Maximal degree in co-relation 40626. Up to 15639 conditions per place. [2024-06-04 14:38:17,853 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-04 14:38:17,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 547 flow [2024-06-04 14:38:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:38:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:38:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-04 14:38:17,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2024-06-04 14:38:17,856 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 163 transitions. [2024-06-04 14:38:17,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 547 flow [2024-06-04 14:38:17,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 528 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 14:38:17,860 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-04 14:38:17,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-04 14:38:17,861 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-04 14:38:17,861 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-04 14:38:17,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:17,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:17,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:17,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:38:17,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:17,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash 830948721, now seen corresponding path program 1 times [2024-06-04 14:38:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:17,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043161796] [2024-06-04 14:38:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:17,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:19,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043161796] [2024-06-04 14:38:19,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043161796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:19,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:19,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:38:19,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247692602] [2024-06-04 14:38:19,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:19,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:38:19,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:19,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:38:19,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:38:19,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:19,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:19,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:19,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:19,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:20,749 INFO L124 PetriNetUnfolderBase]: 11665/16437 cut-off events. [2024-06-04 14:38:20,750 INFO L125 PetriNetUnfolderBase]: For 20006/20011 co-relation queries the response was YES. [2024-06-04 14:38:20,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46889 conditions, 16437 events. 11665/16437 cut-off events. For 20006/20011 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 93514 event pairs, 6185 based on Foata normal form. 11/16367 useless extension candidates. Maximal degree in co-relation 46869. Up to 15625 conditions per place. [2024-06-04 14:38:20,840 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 84 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2024-06-04 14:38:20,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 117 transitions, 716 flow [2024-06-04 14:38:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-04 14:38:20,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 14:38:20,845 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 192 transitions. [2024-06-04 14:38:20,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 117 transitions, 716 flow [2024-06-04 14:38:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 704 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 14:38:20,858 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 408 flow [2024-06-04 14:38:20,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-04 14:38:20,860 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-04 14:38:20,860 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 408 flow [2024-06-04 14:38:20,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:20,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:20,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:20,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:38:20,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:20,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:20,861 INFO L85 PathProgramCache]: Analyzing trace with hash -10391623, now seen corresponding path program 1 times [2024-06-04 14:38:20,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:20,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767833808] [2024-06-04 14:38:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:20,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:22,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:22,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767833808] [2024-06-04 14:38:22,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767833808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:22,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:22,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:22,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196044312] [2024-06-04 14:38:22,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:22,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:22,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:22,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:22,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:22,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:38:22,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 408 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:22,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:22,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:38:22,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:23,962 INFO L124 PetriNetUnfolderBase]: 11694/16488 cut-off events. [2024-06-04 14:38:23,962 INFO L125 PetriNetUnfolderBase]: For 31737/31742 co-relation queries the response was YES. [2024-06-04 14:38:24,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51806 conditions, 16488 events. 11694/16488 cut-off events. For 31737/31742 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 93843 event pairs, 5266 based on Foata normal form. 18/16417 useless extension candidates. Maximal degree in co-relation 51783. Up to 15590 conditions per place. [2024-06-04 14:38:24,063 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 91 selfloop transitions, 30 changer transitions 0/128 dead transitions. [2024-06-04 14:38:24,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 128 transitions, 860 flow [2024-06-04 14:38:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-04 14:38:24,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 14:38:24,065 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 408 flow. Second operand 7 states and 217 transitions. [2024-06-04 14:38:24,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 128 transitions, 860 flow [2024-06-04 14:38:24,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 128 transitions, 794 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:24,074 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 447 flow [2024-06-04 14:38:24,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-04 14:38:24,075 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-04 14:38:24,075 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 447 flow [2024-06-04 14:38:24,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:24,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:24,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:24,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:38:24,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:24,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1158206059, now seen corresponding path program 1 times [2024-06-04 14:38:24,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:24,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798332839] [2024-06-04 14:38:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:24,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:24,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798332839] [2024-06-04 14:38:24,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798332839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:24,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:38:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922796593] [2024-06-04 14:38:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:24,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:38:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:38:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:38:24,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:24,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 447 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:24,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:24,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:24,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:26,744 INFO L124 PetriNetUnfolderBase]: 11685/16447 cut-off events. [2024-06-04 14:38:26,744 INFO L125 PetriNetUnfolderBase]: For 44969/44969 co-relation queries the response was YES. [2024-06-04 14:38:26,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55572 conditions, 16447 events. 11685/16447 cut-off events. For 44969/44969 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 93389 event pairs, 6112 based on Foata normal form. 3/16359 useless extension candidates. Maximal degree in co-relation 55548. Up to 15805 conditions per place. [2024-06-04 14:38:26,884 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 74 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-06-04 14:38:26,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 91 transitions, 659 flow [2024-06-04 14:38:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:38:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:38:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 14:38:26,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-04 14:38:26,889 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 447 flow. Second operand 5 states and 129 transitions. [2024-06-04 14:38:26,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 91 transitions, 659 flow [2024-06-04 14:38:26,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 572 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:38:26,901 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 391 flow [2024-06-04 14:38:26,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=391, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-04 14:38:26,902 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-04 14:38:26,902 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 391 flow [2024-06-04 14:38:26,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:26,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:26,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:26,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:38:26,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:26,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1571430485, now seen corresponding path program 1 times [2024-06-04 14:38:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:26,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582423216] [2024-06-04 14:38:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:26,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582423216] [2024-06-04 14:38:27,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582423216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:27,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:27,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914480644] [2024-06-04 14:38:27,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:27,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:27,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:38:27,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 391 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:27,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:27,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:38:27,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:29,865 INFO L124 PetriNetUnfolderBase]: 14145/19665 cut-off events. [2024-06-04 14:38:29,865 INFO L125 PetriNetUnfolderBase]: For 60028/60028 co-relation queries the response was YES. [2024-06-04 14:38:29,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66815 conditions, 19665 events. 14145/19665 cut-off events. For 60028/60028 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 109211 event pairs, 7102 based on Foata normal form. 10/19666 useless extension candidates. Maximal degree in co-relation 66789. Up to 18955 conditions per place. [2024-06-04 14:38:29,992 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 90 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-04 14:38:29,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 118 transitions, 833 flow [2024-06-04 14:38:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 14:38:29,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-04 14:38:29,994 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 391 flow. Second operand 6 states and 158 transitions. [2024-06-04 14:38:29,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 118 transitions, 833 flow [2024-06-04 14:38:30,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 804 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:30,011 INFO L231 Difference]: Finished difference. Result has 76 places, 88 transitions, 548 flow [2024-06-04 14:38:30,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=548, PETRI_PLACES=76, PETRI_TRANSITIONS=88} [2024-06-04 14:38:30,012 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-04 14:38:30,012 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 88 transitions, 548 flow [2024-06-04 14:38:30,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:30,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:30,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:30,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:38:30,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:30,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1778696862, now seen corresponding path program 1 times [2024-06-04 14:38:30,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:30,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996335743] [2024-06-04 14:38:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:30,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:30,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996335743] [2024-06-04 14:38:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996335743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:30,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:30,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778143028] [2024-06-04 14:38:30,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:30,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:30,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:30,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 88 transitions, 548 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:30,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:30,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:30,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:32,889 INFO L124 PetriNetUnfolderBase]: 13323/18839 cut-off events. [2024-06-04 14:38:32,889 INFO L125 PetriNetUnfolderBase]: For 82170/82190 co-relation queries the response was YES. [2024-06-04 14:38:32,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70761 conditions, 18839 events. 13323/18839 cut-off events. For 82170/82190 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 108572 event pairs, 6620 based on Foata normal form. 14/18710 useless extension candidates. Maximal degree in co-relation 70733. Up to 17843 conditions per place. [2024-06-04 14:38:33,022 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 87 selfloop transitions, 25 changer transitions 0/122 dead transitions. [2024-06-04 14:38:33,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 921 flow [2024-06-04 14:38:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 14:38:33,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-04 14:38:33,024 INFO L175 Difference]: Start difference. First operand has 76 places, 88 transitions, 548 flow. Second operand 6 states and 163 transitions. [2024-06-04 14:38:33,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 921 flow [2024-06-04 14:38:33,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 893 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-04 14:38:33,055 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 616 flow [2024-06-04 14:38:33,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-06-04 14:38:33,055 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2024-06-04 14:38:33,056 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 616 flow [2024-06-04 14:38:33,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:33,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:33,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:33,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:38:33,056 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:33,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:33,057 INFO L85 PathProgramCache]: Analyzing trace with hash -639435468, now seen corresponding path program 2 times [2024-06-04 14:38:33,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:33,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883447360] [2024-06-04 14:38:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:33,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:33,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883447360] [2024-06-04 14:38:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883447360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:33,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:33,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:33,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51436068] [2024-06-04 14:38:33,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:33,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:33,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:33,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:33,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 616 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:33,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:33,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:33,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:35,968 INFO L124 PetriNetUnfolderBase]: 13293/18792 cut-off events. [2024-06-04 14:38:35,968 INFO L125 PetriNetUnfolderBase]: For 90275/90285 co-relation queries the response was YES. [2024-06-04 14:38:36,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71291 conditions, 18792 events. 13293/18792 cut-off events. For 90275/90285 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 108255 event pairs, 6613 based on Foata normal form. 3/18653 useless extension candidates. Maximal degree in co-relation 71260. Up to 17899 conditions per place. [2024-06-04 14:38:36,116 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 92 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-04 14:38:36,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 890 flow [2024-06-04 14:38:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:38:36,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-04 14:38:36,120 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 616 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:38:36,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 890 flow [2024-06-04 14:38:36,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 847 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:38:36,166 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 612 flow [2024-06-04 14:38:36,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=612, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-04 14:38:36,167 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2024-06-04 14:38:36,167 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 612 flow [2024-06-04 14:38:36,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:36,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:36,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:38:36,168 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:36,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1506481004, now seen corresponding path program 1 times [2024-06-04 14:38:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151408471] [2024-06-04 14:38:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:37,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:37,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151408471] [2024-06-04 14:38:37,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151408471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:37,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:37,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:37,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040807644] [2024-06-04 14:38:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:37,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:37,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:37,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:38:37,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 612 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:37,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:37,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:38:37,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:39,579 INFO L124 PetriNetUnfolderBase]: 14546/20204 cut-off events. [2024-06-04 14:38:39,580 INFO L125 PetriNetUnfolderBase]: For 109734/109742 co-relation queries the response was YES. [2024-06-04 14:38:39,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78297 conditions, 20204 events. 14546/20204 cut-off events. For 109734/109742 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 112126 event pairs, 6352 based on Foata normal form. 23/20223 useless extension candidates. Maximal degree in co-relation 78265. Up to 18881 conditions per place. [2024-06-04 14:38:39,905 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 115 selfloop transitions, 43 changer transitions 0/164 dead transitions. [2024-06-04 14:38:39,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 164 transitions, 1372 flow [2024-06-04 14:38:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-04 14:38:39,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-04 14:38:39,907 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 612 flow. Second operand 7 states and 196 transitions. [2024-06-04 14:38:39,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 164 transitions, 1372 flow [2024-06-04 14:38:39,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 164 transitions, 1312 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:39,943 INFO L231 Difference]: Finished difference. Result has 88 places, 116 transitions, 906 flow [2024-06-04 14:38:39,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=906, PETRI_PLACES=88, PETRI_TRANSITIONS=116} [2024-06-04 14:38:39,944 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-04 14:38:39,944 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 116 transitions, 906 flow [2024-06-04 14:38:39,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:39,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:39,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:39,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:38:39,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:39,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1672894808, now seen corresponding path program 2 times [2024-06-04 14:38:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:39,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233561597] [2024-06-04 14:38:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:40,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:40,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233561597] [2024-06-04 14:38:40,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233561597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:40,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:40,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:40,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603597522] [2024-06-04 14:38:40,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:40,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:40,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:40,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:40,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:40,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:38:40,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 906 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:40,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:40,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:38:40,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:43,089 INFO L124 PetriNetUnfolderBase]: 14632/20329 cut-off events. [2024-06-04 14:38:43,089 INFO L125 PetriNetUnfolderBase]: For 148690/148692 co-relation queries the response was YES. [2024-06-04 14:38:43,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89291 conditions, 20329 events. 14632/20329 cut-off events. For 148690/148692 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 112923 event pairs, 6701 based on Foata normal form. 12/20338 useless extension candidates. Maximal degree in co-relation 89255. Up to 19463 conditions per place. [2024-06-04 14:38:43,285 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 31 changer transitions 0/168 dead transitions. [2024-06-04 14:38:43,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 168 transitions, 1604 flow [2024-06-04 14:38:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-04 14:38:43,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-04 14:38:43,286 INFO L175 Difference]: Start difference. First operand has 88 places, 116 transitions, 906 flow. Second operand 7 states and 186 transitions. [2024-06-04 14:38:43,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 168 transitions, 1604 flow [2024-06-04 14:38:43,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 168 transitions, 1540 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-04 14:38:43,390 INFO L231 Difference]: Finished difference. Result has 95 places, 126 transitions, 1051 flow [2024-06-04 14:38:43,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1051, PETRI_PLACES=95, PETRI_TRANSITIONS=126} [2024-06-04 14:38:43,391 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-04 14:38:43,391 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 126 transitions, 1051 flow [2024-06-04 14:38:43,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:43,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:43,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:43,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:38:43,392 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:43,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1683849674, now seen corresponding path program 3 times [2024-06-04 14:38:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:43,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454989530] [2024-06-04 14:38:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:44,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454989530] [2024-06-04 14:38:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454989530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:44,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645218217] [2024-06-04 14:38:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:44,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:38:44,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 126 transitions, 1051 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:44,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:44,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:38:44,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:46,666 INFO L124 PetriNetUnfolderBase]: 14656/20361 cut-off events. [2024-06-04 14:38:46,666 INFO L125 PetriNetUnfolderBase]: For 177103/177105 co-relation queries the response was YES. [2024-06-04 14:38:46,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93186 conditions, 20361 events. 14656/20361 cut-off events. For 177103/177105 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 113080 event pairs, 6694 based on Foata normal form. 12/20370 useless extension candidates. Maximal degree in co-relation 93146. Up to 19624 conditions per place. [2024-06-04 14:38:46,867 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 136 selfloop transitions, 27 changer transitions 0/169 dead transitions. [2024-06-04 14:38:46,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 169 transitions, 1635 flow [2024-06-04 14:38:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:38:46,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-04 14:38:46,870 INFO L175 Difference]: Start difference. First operand has 95 places, 126 transitions, 1051 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:38:46,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 169 transitions, 1635 flow [2024-06-04 14:38:47,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 169 transitions, 1569 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:38:47,008 INFO L231 Difference]: Finished difference. Result has 100 places, 133 transitions, 1148 flow [2024-06-04 14:38:47,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=100, PETRI_TRANSITIONS=133} [2024-06-04 14:38:47,010 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-04 14:38:47,010 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 133 transitions, 1148 flow [2024-06-04 14:38:47,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:47,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:47,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:47,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:38:47,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:47,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1683858602, now seen corresponding path program 1 times [2024-06-04 14:38:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:47,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155758778] [2024-06-04 14:38:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:47,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:48,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:48,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155758778] [2024-06-04 14:38:48,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155758778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:48,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:48,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:38:48,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348328614] [2024-06-04 14:38:48,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:48,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:38:48,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:38:48,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:38:48,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:38:48,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 133 transitions, 1148 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:48,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:48,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:38:48,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:51,091 INFO L124 PetriNetUnfolderBase]: 14676/20385 cut-off events. [2024-06-04 14:38:51,091 INFO L125 PetriNetUnfolderBase]: For 198070/198072 co-relation queries the response was YES. [2024-06-04 14:38:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95575 conditions, 20385 events. 14676/20385 cut-off events. For 198070/198072 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 113198 event pairs, 6527 based on Foata normal form. 12/20394 useless extension candidates. Maximal degree in co-relation 95533. Up to 19608 conditions per place. [2024-06-04 14:38:51,288 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 134 selfloop transitions, 33 changer transitions 0/173 dead transitions. [2024-06-04 14:38:51,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 173 transitions, 1716 flow [2024-06-04 14:38:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:38:51,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-04 14:38:51,290 INFO L175 Difference]: Start difference. First operand has 100 places, 133 transitions, 1148 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:38:51,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 173 transitions, 1716 flow [2024-06-04 14:38:51,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 173 transitions, 1642 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:51,421 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1207 flow [2024-06-04 14:38:51,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-04 14:38:51,422 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-04 14:38:51,422 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1207 flow [2024-06-04 14:38:51,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:51,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:51,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:51,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:38:51,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:51,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 242364478, now seen corresponding path program 1 times [2024-06-04 14:38:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:51,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380778825] [2024-06-04 14:38:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:52,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:52,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380778825] [2024-06-04 14:38:52,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380778825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:52,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:52,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:38:52,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604188261] [2024-06-04 14:38:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:52,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:38:52,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:38:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:38:52,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:38:52,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1207 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-04 14:38:52,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:52,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:38:52,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:54,686 INFO L124 PetriNetUnfolderBase]: 14669/20375 cut-off events. [2024-06-04 14:38:54,687 INFO L125 PetriNetUnfolderBase]: For 223995/223995 co-relation queries the response was YES. [2024-06-04 14:38:54,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99630 conditions, 20375 events. 14669/20375 cut-off events. For 223995/223995 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 113064 event pairs, 6687 based on Foata normal form. 2/20374 useless extension candidates. Maximal degree in co-relation 99587. Up to 19767 conditions per place. [2024-06-04 14:38:54,857 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 135 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2024-06-04 14:38:54,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1533 flow [2024-06-04 14:38:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:38:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:38:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 14:38:54,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-04 14:38:54,859 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1207 flow. Second operand 5 states and 121 transitions. [2024-06-04 14:38:54,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1533 flow [2024-06-04 14:38:54,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 151 transitions, 1418 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:38:54,991 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1121 flow [2024-06-04 14:38:54,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1121, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-04 14:38:54,992 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-04 14:38:54,992 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1121 flow [2024-06-04 14:38:54,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-04 14:38:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:54,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:54,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:38:54,993 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:54,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash 65549697, now seen corresponding path program 1 times [2024-06-04 14:38:54,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:54,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987592316] [2024-06-04 14:38:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:56,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:56,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987592316] [2024-06-04 14:38:56,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987592316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:56,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:56,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:56,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476836602] [2024-06-04 14:38:56,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:56,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:56,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:38:56,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1121 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:56,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:56,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:38:56,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:58,675 INFO L124 PetriNetUnfolderBase]: 14090/19774 cut-off events. [2024-06-04 14:38:58,675 INFO L125 PetriNetUnfolderBase]: For 242968/243126 co-relation queries the response was YES. [2024-06-04 14:38:58,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97772 conditions, 19774 events. 14090/19774 cut-off events. For 242968/243126 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 112574 event pairs, 6107 based on Foata normal form. 34/19651 useless extension candidates. Maximal degree in co-relation 97728. Up to 18547 conditions per place. [2024-06-04 14:38:58,836 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 131 selfloop transitions, 35 changer transitions 0/185 dead transitions. [2024-06-04 14:38:58,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 185 transitions, 1753 flow [2024-06-04 14:38:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:38:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:38:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 14:38:58,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-04 14:38:58,838 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1121 flow. Second operand 7 states and 190 transitions. [2024-06-04 14:38:58,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 185 transitions, 1753 flow [2024-06-04 14:38:58,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 1720 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:58,940 INFO L231 Difference]: Finished difference. Result has 106 places, 145 transitions, 1293 flow [2024-06-04 14:38:58,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1293, PETRI_PLACES=106, PETRI_TRANSITIONS=145} [2024-06-04 14:38:58,940 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-04 14:38:58,940 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 145 transitions, 1293 flow [2024-06-04 14:38:58,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:58,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:58,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:58,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:38:58,941 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:38:58,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash -547452077, now seen corresponding path program 2 times [2024-06-04 14:38:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:58,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603821652] [2024-06-04 14:38:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:00,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603821652] [2024-06-04 14:39:00,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603821652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:00,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:00,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:39:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603239489] [2024-06-04 14:39:00,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:00,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:39:00,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:39:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:39:00,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:39:00,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 145 transitions, 1293 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:00,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:00,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:39:00,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:02,653 INFO L124 PetriNetUnfolderBase]: 14081/19762 cut-off events. [2024-06-04 14:39:02,653 INFO L125 PetriNetUnfolderBase]: For 279718/279876 co-relation queries the response was YES. [2024-06-04 14:39:02,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102155 conditions, 19762 events. 14081/19762 cut-off events. For 279718/279876 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 112490 event pairs, 6107 based on Foata normal form. 34/19639 useless extension candidates. Maximal degree in co-relation 102111. Up to 18589 conditions per place. [2024-06-04 14:39:02,831 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 131 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2024-06-04 14:39:02,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 179 transitions, 1701 flow [2024-06-04 14:39:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 14:39:02,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-04 14:39:02,833 INFO L175 Difference]: Start difference. First operand has 106 places, 145 transitions, 1293 flow. Second operand 7 states and 184 transitions. [2024-06-04 14:39:02,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 179 transitions, 1701 flow [2024-06-04 14:39:03,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 179 transitions, 1584 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-04 14:39:03,019 INFO L231 Difference]: Finished difference. Result has 110 places, 145 transitions, 1245 flow [2024-06-04 14:39:03,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=110, PETRI_TRANSITIONS=145} [2024-06-04 14:39:03,019 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-04 14:39:03,020 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 145 transitions, 1245 flow [2024-06-04 14:39:03,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:03,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:03,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:03,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:39:03,020 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:03,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash -543727272, now seen corresponding path program 1 times [2024-06-04 14:39:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:03,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811661090] [2024-06-04 14:39:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:03,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811661090] [2024-06-04 14:39:03,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811661090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:03,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:03,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:39:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196874535] [2024-06-04 14:39:03,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:03,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:39:03,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:39:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:39:04,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:39:04,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 145 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:04,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:04,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:39:04,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:07,157 INFO L124 PetriNetUnfolderBase]: 14876/20626 cut-off events. [2024-06-04 14:39:07,157 INFO L125 PetriNetUnfolderBase]: For 307460/307473 co-relation queries the response was YES. [2024-06-04 14:39:07,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108302 conditions, 20626 events. 14876/20626 cut-off events. For 307460/307473 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 114015 event pairs, 6276 based on Foata normal form. 16/20638 useless extension candidates. Maximal degree in co-relation 108256. Up to 19134 conditions per place. [2024-06-04 14:39:07,372 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 133 selfloop transitions, 64 changer transitions 0/203 dead transitions. [2024-06-04 14:39:07,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 203 transitions, 2183 flow [2024-06-04 14:39:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-04 14:39:07,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 14:39:07,374 INFO L175 Difference]: Start difference. First operand has 110 places, 145 transitions, 1245 flow. Second operand 7 states and 195 transitions. [2024-06-04 14:39:07,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 203 transitions, 2183 flow [2024-06-04 14:39:07,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 203 transitions, 2111 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:39:07,548 INFO L231 Difference]: Finished difference. Result has 113 places, 156 transitions, 1517 flow [2024-06-04 14:39:07,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1517, PETRI_PLACES=113, PETRI_TRANSITIONS=156} [2024-06-04 14:39:07,549 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-04 14:39:07,549 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 156 transitions, 1517 flow [2024-06-04 14:39:07,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:07,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:07,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:07,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:39:07,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:07,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2061409378, now seen corresponding path program 2 times [2024-06-04 14:39:07,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:07,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578749480] [2024-06-04 14:39:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:07,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:08,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:08,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578749480] [2024-06-04 14:39:08,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578749480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:08,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:08,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:39:08,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691863457] [2024-06-04 14:39:08,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:08,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:39:08,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:08,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:39:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:39:08,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:39:08,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 156 transitions, 1517 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:08,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:08,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:39:08,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:11,284 INFO L124 PetriNetUnfolderBase]: 14854/20598 cut-off events. [2024-06-04 14:39:11,285 INFO L125 PetriNetUnfolderBase]: For 352156/352169 co-relation queries the response was YES. [2024-06-04 14:39:11,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113125 conditions, 20598 events. 14854/20598 cut-off events. For 352156/352169 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 113919 event pairs, 6283 based on Foata normal form. 16/20610 useless extension candidates. Maximal degree in co-relation 113076. Up to 19123 conditions per place. [2024-06-04 14:39:11,488 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 134 selfloop transitions, 68 changer transitions 0/208 dead transitions. [2024-06-04 14:39:11,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 208 transitions, 2365 flow [2024-06-04 14:39:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-04 14:39:11,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 14:39:11,490 INFO L175 Difference]: Start difference. First operand has 113 places, 156 transitions, 1517 flow. Second operand 7 states and 198 transitions. [2024-06-04 14:39:11,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 208 transitions, 2365 flow [2024-06-04 14:39:11,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 208 transitions, 2225 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 14:39:11,807 INFO L231 Difference]: Finished difference. Result has 119 places, 160 transitions, 1651 flow [2024-06-04 14:39:11,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1651, PETRI_PLACES=119, PETRI_TRANSITIONS=160} [2024-06-04 14:39:11,808 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-04 14:39:11,808 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 160 transitions, 1651 flow [2024-06-04 14:39:11,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:11,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:11,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:39:11,808 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:11,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash 182191203, now seen corresponding path program 1 times [2024-06-04 14:39:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:11,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994114433] [2024-06-04 14:39:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:13,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:13,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994114433] [2024-06-04 14:39:13,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994114433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:13,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:13,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:13,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421882836] [2024-06-04 14:39:13,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:13,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:13,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:13,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:13,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:39:13,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 160 transitions, 1651 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:13,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:13,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:39:13,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:16,194 INFO L124 PetriNetUnfolderBase]: 14866/20633 cut-off events. [2024-06-04 14:39:16,194 INFO L125 PetriNetUnfolderBase]: For 377982/377984 co-relation queries the response was YES. [2024-06-04 14:39:16,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115389 conditions, 20633 events. 14866/20633 cut-off events. For 377982/377984 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 114388 event pairs, 6522 based on Foata normal form. 7/20637 useless extension candidates. Maximal degree in co-relation 115337. Up to 19843 conditions per place. [2024-06-04 14:39:16,385 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 154 selfloop transitions, 39 changer transitions 0/199 dead transitions. [2024-06-04 14:39:16,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 199 transitions, 2273 flow [2024-06-04 14:39:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:39:16,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-04 14:39:16,387 INFO L175 Difference]: Start difference. First operand has 119 places, 160 transitions, 1651 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:39:16,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 199 transitions, 2273 flow [2024-06-04 14:39:16,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 199 transitions, 2145 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 14:39:16,617 INFO L231 Difference]: Finished difference. Result has 121 places, 165 transitions, 1705 flow [2024-06-04 14:39:16,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1705, PETRI_PLACES=121, PETRI_TRANSITIONS=165} [2024-06-04 14:39:16,618 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-04 14:39:16,618 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 165 transitions, 1705 flow [2024-06-04 14:39:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:16,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:16,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:16,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:39:16,619 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:16,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash 659734202, now seen corresponding path program 3 times [2024-06-04 14:39:16,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:16,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175847538] [2024-06-04 14:39:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:16,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:17,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:17,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175847538] [2024-06-04 14:39:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175847538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:17,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:17,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:39:17,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452943717] [2024-06-04 14:39:17,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:17,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:39:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:17,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:39:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:39:17,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:39:17,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 165 transitions, 1705 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:17,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:17,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:39:17,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:20,582 INFO L124 PetriNetUnfolderBase]: 14890/20673 cut-off events. [2024-06-04 14:39:20,583 INFO L125 PetriNetUnfolderBase]: For 414247/414262 co-relation queries the response was YES. [2024-06-04 14:39:20,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119133 conditions, 20673 events. 14890/20673 cut-off events. For 414247/414262 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 114548 event pairs, 6537 based on Foata normal form. 22/20691 useless extension candidates. Maximal degree in co-relation 119081. Up to 19878 conditions per place. [2024-06-04 14:39:20,779 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 169 selfloop transitions, 30 changer transitions 0/205 dead transitions. [2024-06-04 14:39:20,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 205 transitions, 2349 flow [2024-06-04 14:39:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:39:20,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-04 14:39:20,788 INFO L175 Difference]: Start difference. First operand has 121 places, 165 transitions, 1705 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:39:20,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 205 transitions, 2349 flow [2024-06-04 14:39:21,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 205 transitions, 2231 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:39:21,119 INFO L231 Difference]: Finished difference. Result has 123 places, 170 transitions, 1747 flow [2024-06-04 14:39:21,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1747, PETRI_PLACES=123, PETRI_TRANSITIONS=170} [2024-06-04 14:39:21,119 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-04 14:39:21,120 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 170 transitions, 1747 flow [2024-06-04 14:39:21,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:21,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:21,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:21,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:39:21,121 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:21,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1076634052, now seen corresponding path program 1 times [2024-06-04 14:39:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:21,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180361179] [2024-06-04 14:39:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:22,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180361179] [2024-06-04 14:39:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180361179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:22,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:22,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:39:22,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948062621] [2024-06-04 14:39:22,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:39:22,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:39:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:39:22,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:39:22,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 170 transitions, 1747 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:22,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:22,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:39:22,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:25,326 INFO L124 PetriNetUnfolderBase]: 14876/20858 cut-off events. [2024-06-04 14:39:25,326 INFO L125 PetriNetUnfolderBase]: For 449933/449933 co-relation queries the response was YES. [2024-06-04 14:39:25,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121325 conditions, 20858 events. 14876/20858 cut-off events. For 449933/449933 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 117341 event pairs, 6508 based on Foata normal form. 4/20859 useless extension candidates. Maximal degree in co-relation 121272. Up to 20029 conditions per place. [2024-06-04 14:39:25,526 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 173 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2024-06-04 14:39:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 193 transitions, 2217 flow [2024-06-04 14:39:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:39:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:39:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 14:39:25,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2024-06-04 14:39:25,528 INFO L175 Difference]: Start difference. First operand has 123 places, 170 transitions, 1747 flow. Second operand 6 states and 142 transitions. [2024-06-04 14:39:25,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 193 transitions, 2217 flow [2024-06-04 14:39:25,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 193 transitions, 2123 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:39:25,974 INFO L231 Difference]: Finished difference. Result has 124 places, 174 transitions, 1746 flow [2024-06-04 14:39:25,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=124, PETRI_TRANSITIONS=174} [2024-06-04 14:39:25,975 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2024-06-04 14:39:25,975 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 174 transitions, 1746 flow [2024-06-04 14:39:25,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:25,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:25,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:25,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:39:25,976 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:39:25,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2031982079, now seen corresponding path program 1 times [2024-06-04 14:39:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:25,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597161399] [2024-06-04 14:39:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat