./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix057_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix057_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:18:22,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:18:22,768 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:18:22,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:18:22,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:18:22,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:18:22,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:18:22,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:18:22,787 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:18:22,787 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:18:22,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:18:22,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:18:22,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:18:22,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:18:22,788 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:18:22,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:18:22,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:18:22,789 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:18:22,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:18:22,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:18:22,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:18:22,790 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:18:22,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:18:22,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:18:22,791 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:18:22,791 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:18:22,791 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:18:22,792 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:18:22,792 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:18:22,792 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:18:22,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:18:22,793 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:18:22,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:18:22,793 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:18:22,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:18:22,794 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:18:22,794 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:18:22,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:18:22,794 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:18:22,794 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:18:22,795 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:18:22,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:18:22,797 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:18:22,797 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:18:23,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:18:23,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:18:23,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:18:23,074 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:18:23,075 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:18:23,076 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix057_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 21:18:23,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:18:23,257 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:18:23,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:18:24,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:18:24,508 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:18:24,509 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:18:24,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02f1b29f6/d7d4322f24994ce6a8e0339c8fd3bf45/FLAGd4fefe68d [2024-06-21 21:18:24,535 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02f1b29f6/d7d4322f24994ce6a8e0339c8fd3bf45 [2024-06-21 21:18:24,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:18:24,538 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:18:24,539 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:18:24,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:18:24,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:18:24,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:18:23" (1/2) ... [2024-06-21 21:18:24,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f11732b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:24, skipping insertion in model container [2024-06-21 21:18:24,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:18:23" (1/2) ... [2024-06-21 21:18:24,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9dd1012 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:24, skipping insertion in model container [2024-06-21 21:18:24,545 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:18:24" (2/2) ... [2024-06-21 21:18:24,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f11732b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:24, skipping insertion in model container [2024-06-21 21:18:24,546 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:18:24" (2/2) ... [2024-06-21 21:18:24,547 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:18:24,636 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:18:24,637 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 21:18:24,638 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 21:18:24,638 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] (((((((((((((((((((! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 21:18:24,638 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] (((((((((((((((((((! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 21:18:24,638 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:18:24,639 INFO L106 edCorrectnessWitness]: ghost_update [L858-L858] multithreaded = 1; [2024-06-21 21:18:24,676 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:18:24,991 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:18:25,003 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:18:25,107 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:18:25,140 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:18:25,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25 WrapperNode [2024-06-21 21:18:25,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:18:25,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:18:25,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:18:25,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:18:25,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,206 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-21 21:18:25,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:18:25,207 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:18:25,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:18:25,207 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:18:25,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,218 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,230 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:18:25,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,231 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,240 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,243 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,244 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:18:25,248 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:18:25,248 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:18:25,248 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:18:25,249 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (1/1) ... [2024-06-21 21:18:25,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:18:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:18:25,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:18:25,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:18:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:18:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:18:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:18:25,301 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:18:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:18:25,301 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:18:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:18:25,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:18:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:18:25,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:18:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:18:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:18:25,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:18:25,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:18:25,304 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:18:25,406 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:18:25,408 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:18:25,801 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:18:25,801 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:18:25,982 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:18:25,983 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:18:25,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:18:25 BoogieIcfgContainer [2024-06-21 21:18:25,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:18:25,986 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:18:25,987 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:18:25,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:18:25,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:18:23" (1/4) ... [2024-06-21 21:18:25,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70744ae6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:18:25, skipping insertion in model container [2024-06-21 21:18:25,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:18:24" (2/4) ... [2024-06-21 21:18:25,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70744ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:18:25, skipping insertion in model container [2024-06-21 21:18:25,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:25" (3/4) ... [2024-06-21 21:18:25,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70744ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:18:25, skipping insertion in model container [2024-06-21 21:18:25,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:18:25" (4/4) ... [2024-06-21 21:18:25,992 INFO L112 eAbstractionObserver]: Analyzing ICFG mix057_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:18:26,006 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:18:26,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:18:26,007 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:18:26,049 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:18:26,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:18:26,104 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 21:18:26,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:18:26,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:18:26,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:18:26,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 21:18:26,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:18:26,129 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;@4d1582fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:18:26,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:18:26,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:18:26,133 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:18:26,133 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:18:26,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:26,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:18:26,134 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)] === [2024-06-21 21:18:26,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash 392035071, now seen corresponding path program 1 times [2024-06-21 21:18:26,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:26,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230188326] [2024-06-21 21:18:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:27,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:27,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230188326] [2024-06-21 21:18:27,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230188326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:27,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:27,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:18:27,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977918928] [2024-06-21 21:18:27,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:27,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:18:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:18:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:18:27,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:18:27,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:27,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:27,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:18:27,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:29,024 INFO L124 PetriNetUnfolderBase]: 14075/18997 cut-off events. [2024-06-21 21:18:29,024 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2024-06-21 21:18:29,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38513 conditions, 18997 events. 14075/18997 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 97401 event pairs, 11070 based on Foata normal form. 1/18739 useless extension candidates. Maximal degree in co-relation 38500. Up to 18981 conditions per place. [2024-06-21 21:18:29,132 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 45 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 21:18:29,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 231 flow [2024-06-21 21:18:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:18:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:18:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-21 21:18:29,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-21 21:18:29,144 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 90 transitions. [2024-06-21 21:18:29,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 231 flow [2024-06-21 21:18:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:29,152 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 21:18:29,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 21:18:29,156 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 21:18:29,156 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 21:18:29,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:29,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:29,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:29,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:18:29,158 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)] === [2024-06-21 21:18:29,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1211389410, now seen corresponding path program 1 times [2024-06-21 21:18:29,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:29,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870087944] [2024-06-21 21:18:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:29,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:29,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:29,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870087944] [2024-06-21 21:18:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870087944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:29,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:18:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960606909] [2024-06-21 21:18:29,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:29,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:18:29,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:18:29,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:18:29,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:18:29,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:29,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:29,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:18:29,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:31,368 INFO L124 PetriNetUnfolderBase]: 14065/18983 cut-off events. [2024-06-21 21:18:31,369 INFO L125 PetriNetUnfolderBase]: For 3370/3370 co-relation queries the response was YES. [2024-06-21 21:18:31,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43116 conditions, 18983 events. 14065/18983 cut-off events. For 3370/3370 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 97481 event pairs, 10115 based on Foata normal form. 4/18983 useless extension candidates. Maximal degree in co-relation 43104. Up to 18946 conditions per place. [2024-06-21 21:18:31,460 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 55 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 21:18:31,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 323 flow [2024-06-21 21:18:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:18:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:18:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-21 21:18:31,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-06-21 21:18:31,462 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 116 transitions. [2024-06-21 21:18:31,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 323 flow [2024-06-21 21:18:31,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:18:31,464 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 21:18:31,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 21:18:31,465 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 21:18:31,465 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 21:18:31,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:31,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:31,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:31,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:18:31,466 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)] === [2024-06-21 21:18:31,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:31,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1101634934, now seen corresponding path program 1 times [2024-06-21 21:18:31,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:31,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754629151] [2024-06-21 21:18:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:31,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754629151] [2024-06-21 21:18:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754629151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:32,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:32,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:18:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415439166] [2024-06-21 21:18:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:32,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:18:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:18:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:18:32,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:18:32,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:32,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:32,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:18:32,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:33,778 INFO L124 PetriNetUnfolderBase]: 14083/19010 cut-off events. [2024-06-21 21:18:33,779 INFO L125 PetriNetUnfolderBase]: For 9698/9698 co-relation queries the response was YES. [2024-06-21 21:18:33,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47791 conditions, 19010 events. 14083/19010 cut-off events. For 9698/9698 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 97466 event pairs, 8523 based on Foata normal form. 7/19011 useless extension candidates. Maximal degree in co-relation 47777. Up to 18867 conditions per place. [2024-06-21 21:18:33,859 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 73 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 21:18:33,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 539 flow [2024-06-21 21:18:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:18:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:18:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-21 21:18:33,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596078431372549 [2024-06-21 21:18:33,861 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 152 transitions. [2024-06-21 21:18:33,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 539 flow [2024-06-21 21:18:33,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:18:33,864 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 21:18:33,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 21:18:33,865 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 21:18:33,865 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 21:18:33,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:33,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:33,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:33,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:18:33,866 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)] === [2024-06-21 21:18:33,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:33,866 INFO L85 PathProgramCache]: Analyzing trace with hash 345058197, now seen corresponding path program 1 times [2024-06-21 21:18:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:33,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331247235] [2024-06-21 21:18:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:34,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:34,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331247235] [2024-06-21 21:18:34,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331247235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:34,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:34,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:18:34,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783661177] [2024-06-21 21:18:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:34,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:18:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:18:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:18:34,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:18:34,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:34,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:34,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:18:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:36,510 INFO L124 PetriNetUnfolderBase]: 14101/19035 cut-off events. [2024-06-21 21:18:36,511 INFO L125 PetriNetUnfolderBase]: For 22858/22864 co-relation queries the response was YES. [2024-06-21 21:18:36,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55053 conditions, 19035 events. 14101/19035 cut-off events. For 22858/22864 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 97649 event pairs, 7568 based on Foata normal form. 11/19040 useless extension candidates. Maximal degree in co-relation 55036. Up to 18853 conditions per place. [2024-06-21 21:18:36,601 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 83 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-21 21:18:36,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 114 transitions, 708 flow [2024-06-21 21:18:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:18:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:18:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 21:18:36,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-21 21:18:36,604 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 179 transitions. [2024-06-21 21:18:36,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 114 transitions, 708 flow [2024-06-21 21:18:36,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 696 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 21:18:36,611 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 402 flow [2024-06-21 21:18:36,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-21 21:18:36,612 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 21:18:36,612 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 402 flow [2024-06-21 21:18:36,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:36,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:36,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:36,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:18:36,613 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)] === [2024-06-21 21:18:36,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:36,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2109249141, now seen corresponding path program 1 times [2024-06-21 21:18:36,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:36,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900646734] [2024-06-21 21:18:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:36,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:37,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900646734] [2024-06-21 21:18:37,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900646734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:37,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:37,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:37,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697686314] [2024-06-21 21:18:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:37,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:37,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:18:37,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:37,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:37,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:18:37,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:39,476 INFO L124 PetriNetUnfolderBase]: 14130/19078 cut-off events. [2024-06-21 21:18:39,476 INFO L125 PetriNetUnfolderBase]: For 36256/36262 co-relation queries the response was YES. [2024-06-21 21:18:39,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60718 conditions, 19078 events. 14130/19078 cut-off events. For 36256/36262 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 98013 event pairs, 6467 based on Foata normal form. 18/19090 useless extension candidates. Maximal degree in co-relation 60698. Up to 18818 conditions per place. [2024-06-21 21:18:39,577 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 90 selfloop transitions, 30 changer transitions 0/125 dead transitions. [2024-06-21 21:18:39,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 125 transitions, 852 flow [2024-06-21 21:18:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:18:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:18:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 21:18:39,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658263305322129 [2024-06-21 21:18:39,581 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 402 flow. Second operand 7 states and 202 transitions. [2024-06-21 21:18:39,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 125 transitions, 852 flow [2024-06-21 21:18:39,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 125 transitions, 786 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:39,592 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 441 flow [2024-06-21 21:18:39,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=441, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-21 21:18:39,599 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 21:18:39,599 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 441 flow [2024-06-21 21:18:39,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:39,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:39,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:39,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:18:39,600 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)] === [2024-06-21 21:18:39,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1673469437, now seen corresponding path program 1 times [2024-06-21 21:18:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:39,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525054810] [2024-06-21 21:18:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:39,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:40,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525054810] [2024-06-21 21:18:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525054810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:40,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:40,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:18:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252409555] [2024-06-21 21:18:40,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:18:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:18:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:18:40,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:40,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:40,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:40,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:40,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:42,072 INFO L124 PetriNetUnfolderBase]: 14121/19064 cut-off events. [2024-06-21 21:18:42,073 INFO L125 PetriNetUnfolderBase]: For 51278/51278 co-relation queries the response was YES. [2024-06-21 21:18:42,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65136 conditions, 19064 events. 14121/19064 cut-off events. For 51278/51278 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 97995 event pairs, 7483 based on Foata normal form. 3/19063 useless extension candidates. Maximal degree in co-relation 65114. Up to 19033 conditions per place. [2024-06-21 21:18:42,186 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 74 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-06-21 21:18:42,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 653 flow [2024-06-21 21:18:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:18:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:18:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-21 21:18:42,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2024-06-21 21:18:42,188 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 441 flow. Second operand 5 states and 114 transitions. [2024-06-21 21:18:42,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 653 flow [2024-06-21 21:18:42,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 566 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:18:42,203 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 385 flow [2024-06-21 21:18:42,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-21 21:18:42,203 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 21:18:42,203 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 385 flow [2024-06-21 21:18:42,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:42,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:42,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:42,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:18:42,204 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)] === [2024-06-21 21:18:42,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 313008961, now seen corresponding path program 1 times [2024-06-21 21:18:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:42,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197689158] [2024-06-21 21:18:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:42,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:42,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197689158] [2024-06-21 21:18:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197689158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:42,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:42,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535403217] [2024-06-21 21:18:42,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:42,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:42,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:42,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:42,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:42,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 385 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:42,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:42,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:42,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:44,665 INFO L124 PetriNetUnfolderBase]: 14145/19097 cut-off events. [2024-06-21 21:18:44,665 INFO L125 PetriNetUnfolderBase]: For 58241/58241 co-relation queries the response was YES. [2024-06-21 21:18:44,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66246 conditions, 19097 events. 14145/19097 cut-off events. For 58241/58241 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 97871 event pairs, 7102 based on Foata normal form. 10/19102 useless extension candidates. Maximal degree in co-relation 66222. Up to 18955 conditions per place. [2024-06-21 21:18:44,872 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 88 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-21 21:18:44,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 116 transitions, 839 flow [2024-06-21 21:18:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:18:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:18:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 21:18:44,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369747899159664 [2024-06-21 21:18:44,875 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 385 flow. Second operand 7 states and 156 transitions. [2024-06-21 21:18:44,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 116 transitions, 839 flow [2024-06-21 21:18:44,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 807 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:44,897 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 562 flow [2024-06-21 21:18:44,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-21 21:18:44,898 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-21 21:18:44,898 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 562 flow [2024-06-21 21:18:44,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:44,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:44,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:44,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:18:44,899 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)] === [2024-06-21 21:18:44,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1113129820, now seen corresponding path program 1 times [2024-06-21 21:18:44,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489809610] [2024-06-21 21:18:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:45,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489809610] [2024-06-21 21:18:45,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489809610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:45,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:45,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448284541] [2024-06-21 21:18:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:45,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:45,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:45,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:45,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:45,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:45,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:45,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:47,311 INFO L124 PetriNetUnfolderBase]: 14294/19315 cut-off events. [2024-06-21 21:18:47,312 INFO L125 PetriNetUnfolderBase]: For 83203/83215 co-relation queries the response was YES. [2024-06-21 21:18:47,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74161 conditions, 19315 events. 14294/19315 cut-off events. For 83203/83215 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 98733 event pairs, 7290 based on Foata normal form. 14/19323 useless extension candidates. Maximal degree in co-relation 74134. Up to 19162 conditions per place. [2024-06-21 21:18:47,431 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 101 selfloop transitions, 27 changer transitions 0/132 dead transitions. [2024-06-21 21:18:47,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 132 transitions, 1051 flow [2024-06-21 21:18:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:18:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:18:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 21:18:47,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-06-21 21:18:47,433 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 562 flow. Second operand 7 states and 154 transitions. [2024-06-21 21:18:47,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 132 transitions, 1051 flow [2024-06-21 21:18:47,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 1023 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-21 21:18:47,468 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 746 flow [2024-06-21 21:18:47,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2024-06-21 21:18:47,469 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 28 predicate places. [2024-06-21 21:18:47,469 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 746 flow [2024-06-21 21:18:47,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:47,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:47,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:18:47,470 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)] === [2024-06-21 21:18:47,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1886413660, now seen corresponding path program 2 times [2024-06-21 21:18:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:47,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508035570] [2024-06-21 21:18:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:47,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:48,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:48,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508035570] [2024-06-21 21:18:48,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508035570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:48,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:48,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:48,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000981356] [2024-06-21 21:18:48,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:48,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:48,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:48,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 746 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:48,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:48,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:48,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:49,957 INFO L124 PetriNetUnfolderBase]: 14279/19291 cut-off events. [2024-06-21 21:18:49,957 INFO L125 PetriNetUnfolderBase]: For 91859/91859 co-relation queries the response was YES. [2024-06-21 21:18:49,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75101 conditions, 19291 events. 14279/19291 cut-off events. For 91859/91859 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 98654 event pairs, 7283 based on Foata normal form. 3/19290 useless extension candidates. Maximal degree in co-relation 75070. Up to 19234 conditions per place. [2024-06-21 21:18:50,054 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 108 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2024-06-21 21:18:50,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 1062 flow [2024-06-21 21:18:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:18:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:18:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 21:18:50,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-06-21 21:18:50,056 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 746 flow. Second operand 6 states and 135 transitions. [2024-06-21 21:18:50,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 1062 flow [2024-06-21 21:18:50,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 127 transitions, 1043 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 21:18:50,096 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 780 flow [2024-06-21 21:18:50,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2024-06-21 21:18:50,097 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-06-21 21:18:50,097 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 780 flow [2024-06-21 21:18:50,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:50,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:50,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:50,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:18:50,098 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)] === [2024-06-21 21:18:50,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash -731051458, now seen corresponding path program 3 times [2024-06-21 21:18:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:50,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949559792] [2024-06-21 21:18:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:50,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:50,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949559792] [2024-06-21 21:18:50,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949559792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:50,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:50,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:50,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192365864] [2024-06-21 21:18:50,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:50,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:50,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:50,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:50,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:50,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:52,737 INFO L124 PetriNetUnfolderBase]: 14384/19437 cut-off events. [2024-06-21 21:18:52,737 INFO L125 PetriNetUnfolderBase]: For 105481/105493 co-relation queries the response was YES. [2024-06-21 21:18:52,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77480 conditions, 19437 events. 14384/19437 cut-off events. For 105481/105493 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99375 event pairs, 7267 based on Foata normal form. 14/19445 useless extension candidates. Maximal degree in co-relation 77447. Up to 19128 conditions per place. [2024-06-21 21:18:52,900 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 98 selfloop transitions, 60 changer transitions 0/162 dead transitions. [2024-06-21 21:18:52,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 162 transitions, 1411 flow [2024-06-21 21:18:52,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:18:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:18:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 21:18:52,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649859943977591 [2024-06-21 21:18:52,902 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 780 flow. Second operand 7 states and 166 transitions. [2024-06-21 21:18:52,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 162 transitions, 1411 flow [2024-06-21 21:18:52,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 162 transitions, 1362 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:52,992 INFO L231 Difference]: Finished difference. Result has 91 places, 128 transitions, 1136 flow [2024-06-21 21:18:52,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1136, PETRI_PLACES=91, PETRI_TRANSITIONS=128} [2024-06-21 21:18:52,992 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-21 21:18:52,992 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 128 transitions, 1136 flow [2024-06-21 21:18:52,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:52,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:52,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:52,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:18:52,993 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)] === [2024-06-21 21:18:52,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2109637782, now seen corresponding path program 1 times [2024-06-21 21:18:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:52,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029442092] [2024-06-21 21:18:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:53,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:53,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029442092] [2024-06-21 21:18:53,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029442092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:53,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:53,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:18:53,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979513455] [2024-06-21 21:18:53,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:53,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:18:53,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:18:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:18:53,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:53,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 128 transitions, 1136 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:53,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:53,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:53,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:55,775 INFO L124 PetriNetUnfolderBase]: 14802/19996 cut-off events. [2024-06-21 21:18:55,775 INFO L125 PetriNetUnfolderBase]: For 124320/124329 co-relation queries the response was YES. [2024-06-21 21:18:55,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82255 conditions, 19996 events. 14802/19996 cut-off events. For 124320/124329 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 102518 event pairs, 6364 based on Foata normal form. 23/20010 useless extension candidates. Maximal degree in co-relation 82219. Up to 18956 conditions per place. [2024-06-21 21:18:55,957 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 129 selfloop transitions, 67 changer transitions 0/200 dead transitions. [2024-06-21 21:18:55,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 200 transitions, 2010 flow [2024-06-21 21:18:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:18:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:18:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 21:18:55,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 21:18:55,960 INFO L175 Difference]: Start difference. First operand has 91 places, 128 transitions, 1136 flow. Second operand 7 states and 181 transitions. [2024-06-21 21:18:55,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 200 transitions, 2010 flow [2024-06-21 21:18:56,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 200 transitions, 1903 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:56,070 INFO L231 Difference]: Finished difference. Result has 97 places, 152 transitions, 1465 flow [2024-06-21 21:18:56,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1465, PETRI_PLACES=97, PETRI_TRANSITIONS=152} [2024-06-21 21:18:56,070 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-21 21:18:56,070 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 152 transitions, 1465 flow [2024-06-21 21:18:56,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:56,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:56,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:56,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:18:56,071 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)] === [2024-06-21 21:18:56,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1631948438, now seen corresponding path program 2 times [2024-06-21 21:18:56,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:56,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774206126] [2024-06-21 21:18:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:56,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:56,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:56,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774206126] [2024-06-21 21:18:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774206126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:56,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:56,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:18:56,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027867425] [2024-06-21 21:18:56,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:56,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:18:56,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:18:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:18:56,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:56,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 152 transitions, 1465 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:56,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:56,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:56,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:59,001 INFO L124 PetriNetUnfolderBase]: 14888/20112 cut-off events. [2024-06-21 21:18:59,001 INFO L125 PetriNetUnfolderBase]: For 165283/165286 co-relation queries the response was YES. [2024-06-21 21:18:59,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93317 conditions, 20112 events. 14888/20112 cut-off events. For 165283/165286 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103226 event pairs, 6732 based on Foata normal form. 12/20119 useless extension candidates. Maximal degree in co-relation 93277. Up to 19793 conditions per place. [2024-06-21 21:18:59,159 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 167 selfloop transitions, 34 changer transitions 0/205 dead transitions. [2024-06-21 21:18:59,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 205 transitions, 2281 flow [2024-06-21 21:18:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:18:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:18:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 21:18:59,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-06-21 21:18:59,161 INFO L175 Difference]: Start difference. First operand has 97 places, 152 transitions, 1465 flow. Second operand 7 states and 171 transitions. [2024-06-21 21:18:59,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 205 transitions, 2281 flow [2024-06-21 21:18:59,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 205 transitions, 2217 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-21 21:18:59,283 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1619 flow [2024-06-21 21:18:59,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1619, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2024-06-21 21:18:59,284 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-21 21:18:59,284 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1619 flow [2024-06-21 21:18:59,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:59,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:59,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:59,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:18:59,285 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)] === [2024-06-21 21:18:59,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash 153954208, now seen corresponding path program 3 times [2024-06-21 21:18:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:59,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10725067] [2024-06-21 21:18:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:59,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:59,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10725067] [2024-06-21 21:18:59,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10725067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:59,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:59,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:18:59,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35869481] [2024-06-21 21:18:59,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:18:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:59,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:18:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:18:59,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:18:59,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1619 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:59,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:59,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:18:59,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:02,469 INFO L124 PetriNetUnfolderBase]: 14912/20144 cut-off events. [2024-06-21 21:19:02,469 INFO L125 PetriNetUnfolderBase]: For 194979/194982 co-relation queries the response was YES. [2024-06-21 21:19:02,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97236 conditions, 20144 events. 14912/20144 cut-off events. For 194979/194982 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103521 event pairs, 6736 based on Foata normal form. 12/20151 useless extension candidates. Maximal degree in co-relation 97192. Up to 19970 conditions per place. [2024-06-21 21:19:02,660 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 172 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2024-06-21 21:19:02,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 204 transitions, 2299 flow [2024-06-21 21:19:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 21:19:02,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649859943977591 [2024-06-21 21:19:02,662 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1619 flow. Second operand 7 states and 166 transitions. [2024-06-21 21:19:02,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 204 transitions, 2299 flow [2024-06-21 21:19:02,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 204 transitions, 2231 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:02,834 INFO L231 Difference]: Finished difference. Result has 109 places, 169 transitions, 1716 flow [2024-06-21 21:19:02,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=109, PETRI_TRANSITIONS=169} [2024-06-21 21:19:02,835 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2024-06-21 21:19:02,835 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 169 transitions, 1716 flow [2024-06-21 21:19:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:02,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:02,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:02,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:19:02,836 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:19:02,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash 153963136, now seen corresponding path program 1 times [2024-06-21 21:19:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:02,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692012248] [2024-06-21 21:19:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:03,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692012248] [2024-06-21 21:19:03,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692012248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:03,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:03,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:03,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791407414] [2024-06-21 21:19:03,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:03,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:03,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:04,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:04,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:19:04,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 169 transitions, 1716 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:04,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:04,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:19:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:07,082 INFO L124 PetriNetUnfolderBase]: 14932/20172 cut-off events. [2024-06-21 21:19:07,083 INFO L125 PetriNetUnfolderBase]: For 217203/217206 co-relation queries the response was YES. [2024-06-21 21:19:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99625 conditions, 20172 events. 14932/20172 cut-off events. For 217203/217206 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103602 event pairs, 6569 based on Foata normal form. 12/20179 useless extension candidates. Maximal degree in co-relation 99579. Up to 19954 conditions per place. [2024-06-21 21:19:07,272 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 170 selfloop transitions, 34 changer transitions 0/208 dead transitions. [2024-06-21 21:19:07,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 208 transitions, 2380 flow [2024-06-21 21:19:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 21:19:07,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2024-06-21 21:19:07,274 INFO L175 Difference]: Start difference. First operand has 109 places, 169 transitions, 1716 flow. Second operand 7 states and 167 transitions. [2024-06-21 21:19:07,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 208 transitions, 2380 flow [2024-06-21 21:19:07,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 208 transitions, 2304 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:07,472 INFO L231 Difference]: Finished difference. Result has 112 places, 173 transitions, 1775 flow [2024-06-21 21:19:07,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1775, PETRI_PLACES=112, PETRI_TRANSITIONS=173} [2024-06-21 21:19:07,472 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-21 21:19:07,473 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 173 transitions, 1775 flow [2024-06-21 21:19:07,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:07,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:07,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:19:07,473 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:19:07,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1169320473, now seen corresponding path program 1 times [2024-06-21 21:19:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897321585] [2024-06-21 21:19:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:08,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:08,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897321585] [2024-06-21 21:19:08,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897321585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:08,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:08,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:19:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154304537] [2024-06-21 21:19:08,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:08,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:19:08,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:19:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:19:08,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:19:08,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 173 transitions, 1775 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:08,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:08,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:19:08,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:10,786 INFO L124 PetriNetUnfolderBase]: 14925/20162 cut-off events. [2024-06-21 21:19:10,786 INFO L125 PetriNetUnfolderBase]: For 243467/243467 co-relation queries the response was YES. [2024-06-21 21:19:11,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103678 conditions, 20162 events. 14925/20162 cut-off events. For 243467/243467 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103481 event pairs, 6729 based on Foata normal form. 2/20160 useless extension candidates. Maximal degree in co-relation 103631. Up to 20113 conditions per place. [2024-06-21 21:19:11,158 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 171 selfloop transitions, 11 changer transitions 0/186 dead transitions. [2024-06-21 21:19:11,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 186 transitions, 2179 flow [2024-06-21 21:19:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:19:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:19:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 21:19:11,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-06-21 21:19:11,159 INFO L175 Difference]: Start difference. First operand has 112 places, 173 transitions, 1775 flow. Second operand 5 states and 110 transitions. [2024-06-21 21:19:11,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 186 transitions, 2179 flow [2024-06-21 21:19:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 186 transitions, 2062 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:11,357 INFO L231 Difference]: Finished difference. Result has 112 places, 173 transitions, 1689 flow [2024-06-21 21:19:11,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1689, PETRI_PLACES=112, PETRI_TRANSITIONS=173} [2024-06-21 21:19:11,358 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-21 21:19:11,358 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 173 transitions, 1689 flow [2024-06-21 21:19:11,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:11,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:11,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:11,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:19:11,359 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)] === [2024-06-21 21:19:11,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash 970448517, now seen corresponding path program 1 times [2024-06-21 21:19:11,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:11,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567722142] [2024-06-21 21:19:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:11,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:12,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:12,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567722142] [2024-06-21 21:19:12,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567722142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:12,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:12,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926749788] [2024-06-21 21:19:12,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:12,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:12,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:19:12,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 173 transitions, 1689 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:12,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:12,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:19:12,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:14,790 INFO L124 PetriNetUnfolderBase]: 14947/20194 cut-off events. [2024-06-21 21:19:14,790 INFO L125 PetriNetUnfolderBase]: For 265192/265207 co-relation queries the response was YES. [2024-06-21 21:19:14,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104906 conditions, 20194 events. 14947/20194 cut-off events. For 265192/265207 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103729 event pairs, 6590 based on Foata normal form. 13/20201 useless extension candidates. Maximal degree in co-relation 104858. Up to 19763 conditions per place. [2024-06-21 21:19:15,104 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 151 selfloop transitions, 64 changer transitions 0/219 dead transitions. [2024-06-21 21:19:15,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 219 transitions, 2441 flow [2024-06-21 21:19:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 21:19:15,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 21:19:15,107 INFO L175 Difference]: Start difference. First operand has 112 places, 173 transitions, 1689 flow. Second operand 7 states and 169 transitions. [2024-06-21 21:19:15,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 219 transitions, 2441 flow [2024-06-21 21:19:15,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 219 transitions, 2414 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:15,299 INFO L231 Difference]: Finished difference. Result has 116 places, 181 transitions, 1925 flow [2024-06-21 21:19:15,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1925, PETRI_PLACES=116, PETRI_TRANSITIONS=181} [2024-06-21 21:19:15,300 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2024-06-21 21:19:15,300 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 181 transitions, 1925 flow [2024-06-21 21:19:15,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:15,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:15,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:15,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:19:15,301 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)] === [2024-06-21 21:19:15,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash 970538727, now seen corresponding path program 2 times [2024-06-21 21:19:15,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:15,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758753617] [2024-06-21 21:19:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:15,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:16,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:16,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758753617] [2024-06-21 21:19:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758753617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:16,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:16,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490436710] [2024-06-21 21:19:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:16,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:16,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:16,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:16,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:19:16,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 181 transitions, 1925 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:16,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:16,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:19:16,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:18,979 INFO L124 PetriNetUnfolderBase]: 14938/20178 cut-off events. [2024-06-21 21:19:18,979 INFO L125 PetriNetUnfolderBase]: For 303372/303387 co-relation queries the response was YES. [2024-06-21 21:19:19,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109525 conditions, 20178 events. 14938/20178 cut-off events. For 303372/303387 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 103540 event pairs, 6570 based on Foata normal form. 13/20185 useless extension candidates. Maximal degree in co-relation 109476. Up to 19834 conditions per place. [2024-06-21 21:19:19,151 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 147 selfloop transitions, 64 changer transitions 0/215 dead transitions. [2024-06-21 21:19:19,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 215 transitions, 2459 flow [2024-06-21 21:19:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 21:19:19,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-21 21:19:19,153 INFO L175 Difference]: Start difference. First operand has 116 places, 181 transitions, 1925 flow. Second operand 7 states and 163 transitions. [2024-06-21 21:19:19,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 215 transitions, 2459 flow [2024-06-21 21:19:19,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 215 transitions, 2312 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:19,542 INFO L231 Difference]: Finished difference. Result has 120 places, 181 transitions, 1920 flow [2024-06-21 21:19:19,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1920, PETRI_PLACES=120, PETRI_TRANSITIONS=181} [2024-06-21 21:19:19,543 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-21 21:19:19,543 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 181 transitions, 1920 flow [2024-06-21 21:19:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:19,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:19,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:19,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:19:19,544 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)] === [2024-06-21 21:19:19,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash 974263532, now seen corresponding path program 1 times [2024-06-21 21:19:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:19,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852388548] [2024-06-21 21:19:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:19,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:20,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:20,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852388548] [2024-06-21 21:19:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852388548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:20,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348252002] [2024-06-21 21:19:20,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:20,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:20,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:19:20,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 181 transitions, 1920 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:20,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:20,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:19:20,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:23,123 INFO L124 PetriNetUnfolderBase]: 15132/20445 cut-off events. [2024-06-21 21:19:23,123 INFO L125 PetriNetUnfolderBase]: For 332509/332524 co-relation queries the response was YES. [2024-06-21 21:19:23,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112852 conditions, 20445 events. 15132/20445 cut-off events. For 332509/332524 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 104905 event pairs, 6326 based on Foata normal form. 16/20452 useless extension candidates. Maximal degree in co-relation 112801. Up to 19209 conditions per place. [2024-06-21 21:19:23,301 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 148 selfloop transitions, 85 changer transitions 0/237 dead transitions. [2024-06-21 21:19:23,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 237 transitions, 2958 flow [2024-06-21 21:19:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 21:19:23,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-06-21 21:19:23,302 INFO L175 Difference]: Start difference. First operand has 120 places, 181 transitions, 1920 flow. Second operand 7 states and 180 transitions. [2024-06-21 21:19:23,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 237 transitions, 2958 flow [2024-06-21 21:19:23,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 237 transitions, 2813 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:23,552 INFO L231 Difference]: Finished difference. Result has 123 places, 192 transitions, 2188 flow [2024-06-21 21:19:23,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2188, PETRI_PLACES=123, PETRI_TRANSITIONS=192} [2024-06-21 21:19:23,553 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-21 21:19:23,553 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 192 transitions, 2188 flow [2024-06-21 21:19:23,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:23,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:23,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:23,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:19:23,554 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)] === [2024-06-21 21:19:23,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash 974257952, now seen corresponding path program 2 times [2024-06-21 21:19:23,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:23,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717142137] [2024-06-21 21:19:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:24,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:24,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717142137] [2024-06-21 21:19:24,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717142137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:24,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:24,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:24,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779077940] [2024-06-21 21:19:24,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:24,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:24,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:24,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:24,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-21 21:19:24,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 192 transitions, 2188 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:24,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:24,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-21 21:19:24,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand