./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix005_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix005_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix005_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix005_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:35:09,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:35:09,748 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:35:09,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:35:09,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:35:09,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:35:09,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:35:09,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:35:09,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:35:09,794 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:35:09,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:35:09,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:35:09,796 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:35:09,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:35:09,797 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:35:09,798 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:35:09,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:35:09,798 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:35:09,798 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:35:09,799 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:35:09,799 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:35:09,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:35:09,800 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:35:09,800 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:35:09,800 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:35:09,800 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:35:09,801 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:35:09,801 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:35:09,802 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:35:09,802 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:35:09,803 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:35:09,803 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:35:09,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:35:09,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:35:09,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:35:09,804 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:35:09,804 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:35:09,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:35:09,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:35:09,805 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:35:09,805 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:35:09,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:35:09,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:35:09,806 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:35:10,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:35:10,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:35:10,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:35:10,100 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:35:10,101 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:35:10,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix005_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:35:11,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:35:11,522 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:35:11,524 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix005_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:35:11,538 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4cdfae5e/91d6155ebb0740728945ebb727901d99/FLAGb9206dcf5 [2024-06-04 14:35:11,549 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4cdfae5e/91d6155ebb0740728945ebb727901d99 [2024-06-04 14:35:11,551 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:35:11,551 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:35:11,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix005_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-04 14:35:11,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:35:11,738 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:35:11,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:35:11,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:35:11,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:35:11,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:35:11" (1/2) ... [2024-06-04 14:35:11,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a90ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:35:11, skipping insertion in model container [2024-06-04 14:35:11,746 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:35:11" (1/2) ... [2024-06-04 14:35:11,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1142e019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:35:11, skipping insertion in model container [2024-06-04 14:35:11,747 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:35:11" (2/2) ... [2024-06-04 14:35:11,748 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a90ebf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:11, skipping insertion in model container [2024-06-04 14:35:11,748 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:35:11" (2/2) ... [2024-06-04 14:35:11,748 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:35:11,914 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:35:11,915 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1))) [2024-06-04 14:35:11,916 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1))) [2024-06-04 14:35:11,916 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1))) [2024-06-04 14:35:11,916 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1))) [2024-06-04 14:35:11,916 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:35:11,916 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-04 14:35:11,961 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:35:12,314 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:35:12,323 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:35:12,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:35:12,494 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:35:12,495 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12 WrapperNode [2024-06-04 14:35:12,495 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:35:12,496 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:35:12,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:35:12,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:35:12,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,595 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-04 14:35:12,596 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:35:12,596 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:35:12,597 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:35:12,597 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:35:12,608 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,624 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,650 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 14:35:12,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,671 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:35:12,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:35:12,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:35:12,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:35:12,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (1/1) ... [2024-06-04 14:35:12,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:35:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:35:12,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 14:35:12,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 14:35:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:35:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:35:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:35:12,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:35:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:35:12,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:35:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:35:12,744 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:35:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:35:12,744 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:35:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:35:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:35:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:35:12,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:35:12,747 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:35:12,886 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:35:12,887 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:35:13,352 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:35:13,352 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:35:13,550 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:35:13,550 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:35:13,551 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:35:13 BoogieIcfgContainer [2024-06-04 14:35:13,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:35:13,554 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:35:13,554 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:35:13,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:35:13,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:35:11" (1/4) ... [2024-06-04 14:35:13,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54659815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:35:13, skipping insertion in model container [2024-06-04 14:35:13,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:35:11" (2/4) ... [2024-06-04 14:35:13,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54659815 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:35:13, skipping insertion in model container [2024-06-04 14:35:13,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:35:12" (3/4) ... [2024-06-04 14:35:13,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54659815 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:35:13, skipping insertion in model container [2024-06-04 14:35:13,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:35:13" (4/4) ... [2024-06-04 14:35:13,565 INFO L112 eAbstractionObserver]: Analyzing ICFG mix005_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:35:13,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:35:13,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:35:13,584 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:35:13,643 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:35:13,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:35:13,724 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-04 14:35:13,724 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:35:13,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:35:13,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 14:35:13,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-04 14:35:13,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:35:13,754 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;@43034d9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:35:13,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:35:13,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:35:13,786 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:35:13,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:35:13,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:13,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:35:13,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:13,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash -242350880, now seen corresponding path program 1 times [2024-06-04 14:35:13,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:13,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077861210] [2024-06-04 14:35:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:15,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:15,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077861210] [2024-06-04 14:35:15,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077861210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:15,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:15,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:35:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686356797] [2024-06-04 14:35:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:15,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:35:15,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:15,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:35:15,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:35:15,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:15,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:15,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:15,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:15,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:17,240 INFO L124 PetriNetUnfolderBase]: 9587/13494 cut-off events. [2024-06-04 14:35:17,241 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-04 14:35:17,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26904 conditions, 13494 events. 9587/13494 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 76149 event pairs, 7462 based on Foata normal form. 1/13219 useless extension candidates. Maximal degree in co-relation 26888. Up to 13017 conditions per place. [2024-06-04 14:35:17,434 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-04 14:35:17,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 237 flow [2024-06-04 14:35:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:35:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:35:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-04 14:35:17,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 14:35:17,449 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 99 transitions. [2024-06-04 14:35:17,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 237 flow [2024-06-04 14:35:17,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:17,463 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-04 14:35:17,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-04 14:35:17,468 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-04 14:35:17,469 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-04 14:35:17,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:17,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:17,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:17,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:35:17,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:17,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash -970904065, now seen corresponding path program 1 times [2024-06-04 14:35:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530330427] [2024-06-04 14:35:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:17,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:18,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:18,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530330427] [2024-06-04 14:35:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530330427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:18,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:18,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:35:18,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550665777] [2024-06-04 14:35:18,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:18,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:35:18,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:35:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:35:18,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:18,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:18,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:18,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:20,618 INFO L124 PetriNetUnfolderBase]: 9577/13488 cut-off events. [2024-06-04 14:35:20,619 INFO L125 PetriNetUnfolderBase]: For 2586/2586 co-relation queries the response was YES. [2024-06-04 14:35:20,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30339 conditions, 13488 events. 9577/13488 cut-off events. For 2586/2586 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 76167 event pairs, 6775 based on Foata normal form. 4/13399 useless extension candidates. Maximal degree in co-relation 30324. Up to 12982 conditions per place. [2024-06-04 14:35:20,710 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 55 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-04 14:35:20,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 329 flow [2024-06-04 14:35:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:35:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:35:20,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-04 14:35:20,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 14:35:20,713 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 128 transitions. [2024-06-04 14:35:20,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 329 flow [2024-06-04 14:35:20,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:35:20,716 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-04 14:35:20,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-04 14:35:20,717 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-04 14:35:20,717 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-04 14:35:20,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:20,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:20,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:20,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:35:20,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:20,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash -33253081, now seen corresponding path program 1 times [2024-06-04 14:35:20,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:20,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300582613] [2024-06-04 14:35:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:21,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:21,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300582613] [2024-06-04 14:35:21,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300582613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:21,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:21,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:35:21,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426355355] [2024-06-04 14:35:21,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:21,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:35:21,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:21,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:35:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:35:22,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:22,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:22,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:22,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:22,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:23,810 INFO L124 PetriNetUnfolderBase]: 9685/13733 cut-off events. [2024-06-04 14:35:23,810 INFO L125 PetriNetUnfolderBase]: For 7550/7550 co-relation queries the response was YES. [2024-06-04 14:35:23,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34274 conditions, 13733 events. 9685/13733 cut-off events. For 7550/7550 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 78282 event pairs, 5476 based on Foata normal form. 10/13648 useless extension candidates. Maximal degree in co-relation 34257. Up to 12955 conditions per place. [2024-06-04 14:35:23,885 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 75 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-04 14:35:23,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 553 flow [2024-06-04 14:35:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:35:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:35:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-04 14:35:23,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-04 14:35:23,888 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 169 transitions. [2024-06-04 14:35:23,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 553 flow [2024-06-04 14:35:23,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 534 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 14:35:23,892 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 316 flow [2024-06-04 14:35:23,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-04 14:35:23,893 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-04 14:35:23,893 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 316 flow [2024-06-04 14:35:23,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:23,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:23,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:23,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:35:23,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:23,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1030843618, now seen corresponding path program 1 times [2024-06-04 14:35:23,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:23,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45244166] [2024-06-04 14:35:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45244166] [2024-06-04 14:35:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45244166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:35:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950241352] [2024-06-04 14:35:25,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:35:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:35:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:35:25,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:25,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:25,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:25,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:27,228 INFO L124 PetriNetUnfolderBase]: 9731/13827 cut-off events. [2024-06-04 14:35:27,229 INFO L125 PetriNetUnfolderBase]: For 18065/18068 co-relation queries the response was YES. [2024-06-04 14:35:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40738 conditions, 13827 events. 9731/13827 cut-off events. For 18065/18068 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 78963 event pairs, 4552 based on Foata normal form. 10/13792 useless extension candidates. Maximal degree in co-relation 40718. Up to 12877 conditions per place. [2024-06-04 14:35:27,364 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 90 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-06-04 14:35:27,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 135 transitions, 864 flow [2024-06-04 14:35:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-04 14:35:27,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-04 14:35:27,367 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 316 flow. Second operand 6 states and 204 transitions. [2024-06-04 14:35:27,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 135 transitions, 864 flow [2024-06-04 14:35:27,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 135 transitions, 852 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 14:35:27,380 INFO L231 Difference]: Finished difference. Result has 73 places, 83 transitions, 554 flow [2024-06-04 14:35:27,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=554, PETRI_PLACES=73, PETRI_TRANSITIONS=83} [2024-06-04 14:35:27,381 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2024-06-04 14:35:27,381 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 83 transitions, 554 flow [2024-06-04 14:35:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:27,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:27,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:27,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:35:27,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:27,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1891379162, now seen corresponding path program 1 times [2024-06-04 14:35:27,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:27,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909058456] [2024-06-04 14:35:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:27,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:28,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909058456] [2024-06-04 14:35:28,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909058456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:28,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:28,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:28,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265977259] [2024-06-04 14:35:28,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:28,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:29,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 14:35:29,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 83 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:29,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:29,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 14:35:29,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:30,863 INFO L124 PetriNetUnfolderBase]: 9991/14210 cut-off events. [2024-06-04 14:35:30,864 INFO L125 PetriNetUnfolderBase]: For 34379/34379 co-relation queries the response was YES. [2024-06-04 14:35:30,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48522 conditions, 14210 events. 9991/14210 cut-off events. For 34379/34379 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 81343 event pairs, 3750 based on Foata normal form. 44/14212 useless extension candidates. Maximal degree in co-relation 48496. Up to 13000 conditions per place. [2024-06-04 14:35:30,975 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 114 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-06-04 14:35:30,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 151 transitions, 1112 flow [2024-06-04 14:35:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:35:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:35:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-04 14:35:30,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-04 14:35:30,980 INFO L175 Difference]: Start difference. First operand has 73 places, 83 transitions, 554 flow. Second operand 7 states and 230 transitions. [2024-06-04 14:35:30,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 151 transitions, 1112 flow [2024-06-04 14:35:31,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 151 transitions, 1076 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-04 14:35:31,007 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 662 flow [2024-06-04 14:35:31,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=662, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2024-06-04 14:35:31,014 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-06-04 14:35:31,015 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 662 flow [2024-06-04 14:35:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:31,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:31,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:31,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:35:31,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:31,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1143104314, now seen corresponding path program 1 times [2024-06-04 14:35:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:31,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775716811] [2024-06-04 14:35:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775716811] [2024-06-04 14:35:31,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775716811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:31,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:31,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:35:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080477578] [2024-06-04 14:35:31,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:35:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:35:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:35:32,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:32,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 662 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:32,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:32,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:32,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:33,812 INFO L124 PetriNetUnfolderBase]: 9973/14179 cut-off events. [2024-06-04 14:35:33,812 INFO L125 PetriNetUnfolderBase]: For 43792/43792 co-relation queries the response was YES. [2024-06-04 14:35:33,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51082 conditions, 14179 events. 9973/14179 cut-off events. For 43792/43792 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 81181 event pairs, 4704 based on Foata normal form. 6/14144 useless extension candidates. Maximal degree in co-relation 51052. Up to 13556 conditions per place. [2024-06-04 14:35:33,889 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 85 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-06-04 14:35:33,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 106 transitions, 902 flow [2024-06-04 14:35:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:35:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:35:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-04 14:35:33,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-06-04 14:35:33,894 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 662 flow. Second operand 5 states and 134 transitions. [2024-06-04 14:35:33,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 106 transitions, 902 flow [2024-06-04 14:35:33,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 834 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:33,921 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 634 flow [2024-06-04 14:35:33,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=634, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-04 14:35:33,924 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2024-06-04 14:35:33,924 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 634 flow [2024-06-04 14:35:33,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:33,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:33,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:35:33,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:33,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1681334921, now seen corresponding path program 1 times [2024-06-04 14:35:33,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:33,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108836760] [2024-06-04 14:35:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:33,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:35,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108836760] [2024-06-04 14:35:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108836760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:35,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:35,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468963047] [2024-06-04 14:35:35,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:35,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:35,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:35,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:35,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:35,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:35,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:35,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:36,793 INFO L124 PetriNetUnfolderBase]: 9999/14198 cut-off events. [2024-06-04 14:35:36,793 INFO L125 PetriNetUnfolderBase]: For 49008/49008 co-relation queries the response was YES. [2024-06-04 14:35:36,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51689 conditions, 14198 events. 9999/14198 cut-off events. For 49008/49008 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 81148 event pairs, 4443 based on Foata normal form. 12/14162 useless extension candidates. Maximal degree in co-relation 51657. Up to 13403 conditions per place. [2024-06-04 14:35:36,893 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 92 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-04 14:35:36,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 1032 flow [2024-06-04 14:35:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-04 14:35:36,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-06-04 14:35:36,895 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 634 flow. Second operand 6 states and 170 transitions. [2024-06-04 14:35:36,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 1032 flow [2024-06-04 14:35:36,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 991 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:36,926 INFO L231 Difference]: Finished difference. Result has 83 places, 93 transitions, 702 flow [2024-06-04 14:35:36,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=702, PETRI_PLACES=83, PETRI_TRANSITIONS=93} [2024-06-04 14:35:36,927 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-06-04 14:35:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 93 transitions, 702 flow [2024-06-04 14:35:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:36,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:36,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:35:36,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -987823691, now seen corresponding path program 2 times [2024-06-04 14:35:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045659662] [2024-06-04 14:35:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:38,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:38,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045659662] [2024-06-04 14:35:38,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045659662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:38,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:38,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:38,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226902199] [2024-06-04 14:35:38,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:38,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:38,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:38,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:38,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:38,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 702 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:38,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:38,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:38,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:39,898 INFO L124 PetriNetUnfolderBase]: 9909/14059 cut-off events. [2024-06-04 14:35:39,898 INFO L125 PetriNetUnfolderBase]: For 55479/55479 co-relation queries the response was YES. [2024-06-04 14:35:39,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52290 conditions, 14059 events. 9909/14059 cut-off events. For 55479/55479 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 80140 event pairs, 4662 based on Foata normal form. 6/14020 useless extension candidates. Maximal degree in co-relation 52258. Up to 13433 conditions per place. [2024-06-04 14:35:39,993 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 96 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-06-04 14:35:39,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 118 transitions, 988 flow [2024-06-04 14:35:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:39,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-04 14:35:39,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-04 14:35:39,995 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 702 flow. Second operand 6 states and 159 transitions. [2024-06-04 14:35:39,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 118 transitions, 988 flow [2024-06-04 14:35:40,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 945 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:35:40,033 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 698 flow [2024-06-04 14:35:40,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-04 14:35:40,034 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-06-04 14:35:40,034 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 698 flow [2024-06-04 14:35:40,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:40,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:40,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:40,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:35:40,035 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:40,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -404395923, now seen corresponding path program 1 times [2024-06-04 14:35:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:40,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026057324] [2024-06-04 14:35:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:40,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026057324] [2024-06-04 14:35:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026057324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:41,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:41,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229022354] [2024-06-04 14:35:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:41,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:42,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:35:42,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:42,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:42,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:35:42,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:44,156 INFO L124 PetriNetUnfolderBase]: 12021/17006 cut-off events. [2024-06-04 14:35:44,156 INFO L125 PetriNetUnfolderBase]: For 74955/74955 co-relation queries the response was YES. [2024-06-04 14:35:44,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62960 conditions, 17006 events. 12021/17006 cut-off events. For 74955/74955 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 97237 event pairs, 5694 based on Foata normal form. 6/16880 useless extension candidates. Maximal degree in co-relation 62927. Up to 16224 conditions per place. [2024-06-04 14:35:44,276 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 105 selfloop transitions, 20 changer transitions 0/132 dead transitions. [2024-06-04 14:35:44,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 1101 flow [2024-06-04 14:35:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:35:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:35:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:35:44,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-04 14:35:44,279 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 698 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:35:44,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 1101 flow [2024-06-04 14:35:44,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 132 transitions, 1031 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:44,317 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 762 flow [2024-06-04 14:35:44,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=762, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-04 14:35:44,318 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-04 14:35:44,319 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 762 flow [2024-06-04 14:35:44,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:44,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:44,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:44,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:35:44,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:44,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1300804121, now seen corresponding path program 1 times [2024-06-04 14:35:44,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:44,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493698393] [2024-06-04 14:35:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:44,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:45,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:45,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493698393] [2024-06-04 14:35:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493698393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:45,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:35:45,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157301974] [2024-06-04 14:35:45,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:35:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:35:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:35:45,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:35:45,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 762 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:45,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:45,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:35:45,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:47,379 INFO L124 PetriNetUnfolderBase]: 14450/20094 cut-off events. [2024-06-04 14:35:47,380 INFO L125 PetriNetUnfolderBase]: For 105472/105472 co-relation queries the response was YES. [2024-06-04 14:35:47,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78250 conditions, 20094 events. 14450/20094 cut-off events. For 105472/105472 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 111833 event pairs, 7121 based on Foata normal form. 2/20093 useless extension candidates. Maximal degree in co-relation 78216. Up to 19509 conditions per place. [2024-06-04 14:35:47,528 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 102 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-06-04 14:35:47,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1060 flow [2024-06-04 14:35:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:35:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:35:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 14:35:47,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-04 14:35:47,529 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 762 flow. Second operand 5 states and 121 transitions. [2024-06-04 14:35:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1060 flow [2024-06-04 14:35:47,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 1000 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:47,587 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 777 flow [2024-06-04 14:35:47,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=777, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2024-06-04 14:35:47,588 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-04 14:35:47,588 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 777 flow [2024-06-04 14:35:47,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:47,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:47,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:47,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:35:47,589 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:47,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:47,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1363287336, now seen corresponding path program 1 times [2024-06-04 14:35:47,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:47,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412489649] [2024-06-04 14:35:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:47,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:49,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412489649] [2024-06-04 14:35:49,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412489649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:49,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:49,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336719402] [2024-06-04 14:35:49,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:49,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:35:49,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 777 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:49,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:49,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:35:49,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:51,443 INFO L124 PetriNetUnfolderBase]: 13377/18936 cut-off events. [2024-06-04 14:35:51,443 INFO L125 PetriNetUnfolderBase]: For 126384/126384 co-relation queries the response was YES. [2024-06-04 14:35:51,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78278 conditions, 18936 events. 13377/18936 cut-off events. For 126384/126384 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 110832 event pairs, 5350 based on Foata normal form. 6/18883 useless extension candidates. Maximal degree in co-relation 78243. Up to 17604 conditions per place. [2024-06-04 14:35:51,581 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 109 selfloop transitions, 37 changer transitions 0/156 dead transitions. [2024-06-04 14:35:51,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 156 transitions, 1239 flow [2024-06-04 14:35:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 14:35:51,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-04 14:35:51,583 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 777 flow. Second operand 8 states and 223 transitions. [2024-06-04 14:35:51,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 156 transitions, 1239 flow [2024-06-04 14:35:51,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1194 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:35:51,650 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 866 flow [2024-06-04 14:35:51,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=866, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-04 14:35:51,651 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-04 14:35:51,651 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 866 flow [2024-06-04 14:35:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:51,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:51,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:35:51,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:51,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash -110538058, now seen corresponding path program 1 times [2024-06-04 14:35:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:51,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139984747] [2024-06-04 14:35:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:51,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139984747] [2024-06-04 14:35:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139984747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:53,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:35:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000579984] [2024-06-04 14:35:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:35:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:35:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:35:53,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:35:53,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 866 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:53,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:53,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:35:53,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:55,447 INFO L124 PetriNetUnfolderBase]: 13651/19232 cut-off events. [2024-06-04 14:35:55,447 INFO L125 PetriNetUnfolderBase]: For 151458/151458 co-relation queries the response was YES. [2024-06-04 14:35:55,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84277 conditions, 19232 events. 13651/19232 cut-off events. For 151458/151458 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 109886 event pairs, 6405 based on Foata normal form. 3/19177 useless extension candidates. Maximal degree in co-relation 84241. Up to 18237 conditions per place. [2024-06-04 14:35:55,587 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 111 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-06-04 14:35:55,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 144 transitions, 1266 flow [2024-06-04 14:35:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:35:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:35:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:35:55,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-04 14:35:55,589 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 866 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:35:55,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 144 transitions, 1266 flow [2024-06-04 14:35:55,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1156 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:55,668 INFO L231 Difference]: Finished difference. Result has 95 places, 112 transitions, 874 flow [2024-06-04 14:35:55,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=95, PETRI_TRANSITIONS=112} [2024-06-04 14:35:55,669 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-04 14:35:55,669 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 112 transitions, 874 flow [2024-06-04 14:35:55,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:55,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:55,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:55,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:35:55,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:35:55,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1670220903, now seen corresponding path program 1 times [2024-06-04 14:35:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:55,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726730944] [2024-06-04 14:35:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:56,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:56,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726730944] [2024-06-04 14:35:56,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726730944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:56,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:56,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:35:56,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271844285] [2024-06-04 14:35:56,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:56,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:35:56,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:56,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:35:56,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:35:56,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:35:56,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 112 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:56,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:56,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:35:56,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:59,105 INFO L124 PetriNetUnfolderBase]: 14444/20101 cut-off events. [2024-06-04 14:35:59,105 INFO L125 PetriNetUnfolderBase]: For 171855/171855 co-relation queries the response was YES. [2024-06-04 14:35:59,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88172 conditions, 20101 events. 14444/20101 cut-off events. For 171855/171855 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 111753 event pairs, 6894 based on Foata normal form. 4/20102 useless extension candidates. Maximal degree in co-relation 88135. Up to 19485 conditions per place. [2024-06-04 14:35:59,269 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 115 selfloop transitions, 14 changer transitions 0/135 dead transitions. [2024-06-04 14:35:59,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 1226 flow [2024-06-04 14:35:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:35:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:35:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 14:35:59,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2024-06-04 14:35:59,270 INFO L175 Difference]: Start difference. First operand has 95 places, 112 transitions, 874 flow. Second operand 6 states and 142 transitions. [2024-06-04 14:35:59,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 1226 flow [2024-06-04 14:35:59,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 135 transitions, 1155 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:59,351 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 894 flow [2024-06-04 14:35:59,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=894, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-04 14:35:59,352 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-04 14:35:59,352 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 894 flow [2024-06-04 14:35:59,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:59,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:59,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:59,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:35:59,353 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)] === [2024-06-04 14:35:59,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash -856889710, now seen corresponding path program 1 times [2024-06-04 14:35:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:59,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102696488] [2024-06-04 14:35:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:59,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:00,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102696488] [2024-06-04 14:36:00,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102696488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:00,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:36:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075028667] [2024-06-04 14:36:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:00,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:36:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:36:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:36:01,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:01,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 894 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:01,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:01,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:01,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:03,372 INFO L124 PetriNetUnfolderBase]: 13693/19444 cut-off events. [2024-06-04 14:36:03,372 INFO L125 PetriNetUnfolderBase]: For 204751/204759 co-relation queries the response was YES. [2024-06-04 14:36:03,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90993 conditions, 19444 events. 13693/19444 cut-off events. For 204751/204759 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 114771 event pairs, 3973 based on Foata normal form. 28/19360 useless extension candidates. Maximal degree in co-relation 90955. Up to 17286 conditions per place. [2024-06-04 14:36:03,533 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 116 selfloop transitions, 57 changer transitions 0/183 dead transitions. [2024-06-04 14:36:03,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 183 transitions, 1648 flow [2024-06-04 14:36:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-04 14:36:03,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393518518518519 [2024-06-04 14:36:03,536 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 894 flow. Second operand 8 states and 233 transitions. [2024-06-04 14:36:03,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 183 transitions, 1648 flow [2024-06-04 14:36:03,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 183 transitions, 1587 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 14:36:03,640 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 1063 flow [2024-06-04 14:36:03,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1063, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2024-06-04 14:36:03,640 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-04 14:36:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 1063 flow [2024-06-04 14:36:03,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:03,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:03,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:36:03,641 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:03,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash -687764190, now seen corresponding path program 2 times [2024-06-04 14:36:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675785776] [2024-06-04 14:36:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675785776] [2024-06-04 14:36:05,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675785776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:05,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:05,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:36:05,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93052953] [2024-06-04 14:36:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:36:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:36:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:36:05,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:05,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 1063 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:05,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:05,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:05,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:07,642 INFO L124 PetriNetUnfolderBase]: 13903/19770 cut-off events. [2024-06-04 14:36:07,642 INFO L125 PetriNetUnfolderBase]: For 236330/236338 co-relation queries the response was YES. [2024-06-04 14:36:07,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96064 conditions, 19770 events. 13903/19770 cut-off events. For 236330/236338 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 117371 event pairs, 5173 based on Foata normal form. 34/19714 useless extension candidates. Maximal degree in co-relation 96024. Up to 18099 conditions per place. [2024-06-04 14:36:07,817 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 116 selfloop transitions, 57 changer transitions 0/183 dead transitions. [2024-06-04 14:36:07,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 183 transitions, 1711 flow [2024-06-04 14:36:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-04 14:36:07,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-04 14:36:07,819 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 1063 flow. Second operand 8 states and 228 transitions. [2024-06-04 14:36:07,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 183 transitions, 1711 flow [2024-06-04 14:36:07,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 183 transitions, 1629 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:36:07,976 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1177 flow [2024-06-04 14:36:07,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1177, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-04 14:36:07,977 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-04 14:36:07,977 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1177 flow [2024-06-04 14:36:07,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:07,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:07,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:07,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:36:07,978 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:07,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash -854032750, now seen corresponding path program 3 times [2024-06-04 14:36:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:07,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852056653] [2024-06-04 14:36:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:09,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:09,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852056653] [2024-06-04 14:36:09,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852056653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:09,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:09,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:36:09,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227895845] [2024-06-04 14:36:09,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:09,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:36:09,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:09,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:36:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:36:09,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 14:36:09,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1177 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:09,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:09,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 14:36:09,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:12,144 INFO L124 PetriNetUnfolderBase]: 14210/20185 cut-off events. [2024-06-04 14:36:12,144 INFO L125 PetriNetUnfolderBase]: For 268468/268468 co-relation queries the response was YES. [2024-06-04 14:36:12,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100395 conditions, 20185 events. 14210/20185 cut-off events. For 268468/268468 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 119748 event pairs, 5250 based on Foata normal form. 60/20134 useless extension candidates. Maximal degree in co-relation 100353. Up to 18546 conditions per place. [2024-06-04 14:36:12,345 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 133 selfloop transitions, 40 changer transitions 0/183 dead transitions. [2024-06-04 14:36:12,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 183 transitions, 1761 flow [2024-06-04 14:36:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 14:36:12,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-04 14:36:12,347 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1177 flow. Second operand 8 states and 223 transitions. [2024-06-04 14:36:12,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 183 transitions, 1761 flow [2024-06-04 14:36:12,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1652 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:36:12,818 INFO L231 Difference]: Finished difference. Result has 108 places, 133 transitions, 1264 flow [2024-06-04 14:36:12,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1264, PETRI_PLACES=108, PETRI_TRANSITIONS=133} [2024-06-04 14:36:12,818 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-04 14:36:12,819 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 133 transitions, 1264 flow [2024-06-04 14:36:12,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:12,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:12,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:12,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:36:12,819 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:12,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -248680954, now seen corresponding path program 1 times [2024-06-04 14:36:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:12,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432851389] [2024-06-04 14:36:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432851389] [2024-06-04 14:36:13,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432851389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:13,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:13,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:36:13,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969762433] [2024-06-04 14:36:13,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:13,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:36:13,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:13,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:36:13,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:36:13,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:36:13,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:13,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:13,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:36:13,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:16,704 INFO L124 PetriNetUnfolderBase]: 15375/21491 cut-off events. [2024-06-04 14:36:16,704 INFO L125 PetriNetUnfolderBase]: For 289379/289385 co-relation queries the response was YES. [2024-06-04 14:36:16,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107870 conditions, 21491 events. 15375/21491 cut-off events. For 289379/289385 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 121426 event pairs, 6830 based on Foata normal form. 6/21493 useless extension candidates. Maximal degree in co-relation 107827. Up to 20844 conditions per place. [2024-06-04 14:36:16,842 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 140 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-06-04 14:36:16,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 1820 flow [2024-06-04 14:36:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:36:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:36:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 14:36:16,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660493827160494 [2024-06-04 14:36:16,844 INFO L175 Difference]: Start difference. First operand has 108 places, 133 transitions, 1264 flow. Second operand 6 states and 151 transitions. [2024-06-04 14:36:16,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 1820 flow [2024-06-04 14:36:17,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 167 transitions, 1679 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 14:36:17,037 INFO L231 Difference]: Finished difference. Result has 107 places, 141 transitions, 1286 flow [2024-06-04 14:36:17,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1286, PETRI_PLACES=107, PETRI_TRANSITIONS=141} [2024-06-04 14:36:17,038 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-04 14:36:17,038 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 141 transitions, 1286 flow [2024-06-04 14:36:17,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:17,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:17,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:17,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:36:17,039 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:17,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2077682890, now seen corresponding path program 1 times [2024-06-04 14:36:17,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:17,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842886559] [2024-06-04 14:36:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:17,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:18,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842886559] [2024-06-04 14:36:18,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842886559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:18,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:18,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:36:18,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96953848] [2024-06-04 14:36:18,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:18,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:36:18,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:36:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:36:18,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:36:18,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 141 transitions, 1286 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:18,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:18,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:36:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:21,347 INFO L124 PetriNetUnfolderBase]: 14598/20712 cut-off events. [2024-06-04 14:36:21,347 INFO L125 PetriNetUnfolderBase]: For 323812/323823 co-relation queries the response was YES. [2024-06-04 14:36:21,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108614 conditions, 20712 events. 14598/20712 cut-off events. For 323812/323823 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 121064 event pairs, 5666 based on Foata normal form. 7/20604 useless extension candidates. Maximal degree in co-relation 108570. Up to 19306 conditions per place. [2024-06-04 14:36:21,519 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 121 selfloop transitions, 44 changer transitions 0/175 dead transitions. [2024-06-04 14:36:21,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 175 transitions, 1710 flow [2024-06-04 14:36:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:36:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:36:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-04 14:36:21,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2024-06-04 14:36:21,521 INFO L175 Difference]: Start difference. First operand has 107 places, 141 transitions, 1286 flow. Second operand 6 states and 169 transitions. [2024-06-04 14:36:21,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 175 transitions, 1710 flow [2024-06-04 14:36:21,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 175 transitions, 1648 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-04 14:36:21,727 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1332 flow [2024-06-04 14:36:21,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1332, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2024-06-04 14:36:21,727 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-04 14:36:21,727 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1332 flow [2024-06-04 14:36:21,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:21,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:21,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:21,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:36:21,728 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:21,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1485136214, now seen corresponding path program 1 times [2024-06-04 14:36:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774664323] [2024-06-04 14:36:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:21,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:23,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:23,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774664323] [2024-06-04 14:36:23,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774664323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:23,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:23,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:23,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569143212] [2024-06-04 14:36:23,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:23,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:23,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:23,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:36:23,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1332 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:23,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:23,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:36:23,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:26,697 INFO L124 PetriNetUnfolderBase]: 14634/20759 cut-off events. [2024-06-04 14:36:26,698 INFO L125 PetriNetUnfolderBase]: For 351862/351862 co-relation queries the response was YES. [2024-06-04 14:36:26,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110892 conditions, 20759 events. 14634/20759 cut-off events. For 351862/351862 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 121360 event pairs, 6245 based on Foata normal form. 6/20655 useless extension candidates. Maximal degree in co-relation 110846. Up to 19651 conditions per place. [2024-06-04 14:36:26,862 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 153 selfloop transitions, 21 changer transitions 0/184 dead transitions. [2024-06-04 14:36:26,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 184 transitions, 1840 flow [2024-06-04 14:36:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:36:26,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2024-06-04 14:36:26,865 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1332 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:36:26,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 184 transitions, 1840 flow [2024-06-04 14:36:27,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 184 transitions, 1752 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:27,072 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1358 flow [2024-06-04 14:36:27,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2024-06-04 14:36:27,072 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-04 14:36:27,072 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1358 flow [2024-06-04 14:36:27,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:27,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:27,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:27,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:36:27,073 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:27,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1344834342, now seen corresponding path program 2 times [2024-06-04 14:36:27,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:27,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800169937] [2024-06-04 14:36:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:27,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:28,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800169937] [2024-06-04 14:36:28,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800169937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:28,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:28,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:28,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881379658] [2024-06-04 14:36:28,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:28,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:28,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:28,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:36:28,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:28,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:28,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:36:28,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:31,296 INFO L124 PetriNetUnfolderBase]: 14670/20811 cut-off events. [2024-06-04 14:36:31,296 INFO L125 PetriNetUnfolderBase]: For 391412/391412 co-relation queries the response was YES. [2024-06-04 14:36:31,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114486 conditions, 20811 events. 14670/20811 cut-off events. For 391412/391412 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 121400 event pairs, 6117 based on Foata normal form. 6/20707 useless extension candidates. Maximal degree in co-relation 114439. Up to 19680 conditions per place. [2024-06-04 14:36:31,490 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 154 selfloop transitions, 23 changer transitions 0/187 dead transitions. [2024-06-04 14:36:31,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 187 transitions, 1876 flow [2024-06-04 14:36:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:36:31,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2024-06-04 14:36:31,492 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1358 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:36:31,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 187 transitions, 1876 flow [2024-06-04 14:36:31,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1790 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:31,798 INFO L231 Difference]: Finished difference. Result has 117 places, 147 transitions, 1396 flow [2024-06-04 14:36:31,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1396, PETRI_PLACES=117, PETRI_TRANSITIONS=147} [2024-06-04 14:36:31,799 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-04 14:36:31,799 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 147 transitions, 1396 flow [2024-06-04 14:36:31,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:31,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:31,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:31,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:36:31,799 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:31,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1620867234, now seen corresponding path program 3 times [2024-06-04 14:36:31,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:31,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660886084] [2024-06-04 14:36:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:31,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:33,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:33,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660886084] [2024-06-04 14:36:33,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660886084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:33,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:33,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:33,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366942555] [2024-06-04 14:36:33,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:33,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:33,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:33,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:36:33,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 147 transitions, 1396 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:33,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:33,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:36:33,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:36,936 INFO L124 PetriNetUnfolderBase]: 14706/20863 cut-off events. [2024-06-04 14:36:36,936 INFO L125 PetriNetUnfolderBase]: For 434136/434136 co-relation queries the response was YES. [2024-06-04 14:36:37,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118202 conditions, 20863 events. 14706/20863 cut-off events. For 434136/434136 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 121917 event pairs, 6245 based on Foata normal form. 6/20759 useless extension candidates. Maximal degree in co-relation 118154. Up to 19710 conditions per place. [2024-06-04 14:36:37,374 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 157 selfloop transitions, 28 changer transitions 0/195 dead transitions. [2024-06-04 14:36:37,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 195 transitions, 1981 flow [2024-06-04 14:36:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 14:36:37,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2024-06-04 14:36:37,376 INFO L175 Difference]: Start difference. First operand has 117 places, 147 transitions, 1396 flow. Second operand 8 states and 205 transitions. [2024-06-04 14:36:37,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 195 transitions, 1981 flow [2024-06-04 14:36:37,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 195 transitions, 1883 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 14:36:37,651 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1489 flow [2024-06-04 14:36:37,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1489, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-04 14:36:37,651 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-04 14:36:37,652 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1489 flow [2024-06-04 14:36:37,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:37,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:37,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:37,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:36:37,653 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:37,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash -566430998, now seen corresponding path program 4 times [2024-06-04 14:36:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690054717] [2024-06-04 14:36:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:39,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690054717] [2024-06-04 14:36:39,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690054717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:39,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:39,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:36:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645415540] [2024-06-04 14:36:39,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:36:39,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:36:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:36:39,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 14:36:39,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1489 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:39,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:39,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 14:36:39,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:42,595 INFO L124 PetriNetUnfolderBase]: 14691/20842 cut-off events. [2024-06-04 14:36:42,595 INFO L125 PetriNetUnfolderBase]: For 479220/479220 co-relation queries the response was YES. [2024-06-04 14:36:42,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122153 conditions, 20842 events. 14691/20842 cut-off events. For 479220/479220 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 121755 event pairs, 6242 based on Foata normal form. 6/20738 useless extension candidates. Maximal degree in co-relation 122103. Up to 19674 conditions per place. [2024-06-04 14:36:42,892 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 156 selfloop transitions, 31 changer transitions 0/197 dead transitions. [2024-06-04 14:36:42,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 197 transitions, 2041 flow [2024-06-04 14:36:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:36:42,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2024-06-04 14:36:42,893 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1489 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:36:42,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 197 transitions, 2041 flow [2024-06-04 14:36:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 197 transitions, 1919 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:43,178 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1523 flow [2024-06-04 14:36:43,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1523, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-04 14:36:43,178 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-04 14:36:43,178 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1523 flow [2024-06-04 14:36:43,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:43,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:43,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:36:43,179 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:43,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:43,179 INFO L85 PathProgramCache]: Analyzing trace with hash -237253114, now seen corresponding path program 2 times [2024-06-04 14:36:43,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:43,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299778652] [2024-06-04 14:36:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:43,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:44,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299778652] [2024-06-04 14:36:44,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299778652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:44,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:44,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:36:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23146026] [2024-06-04 14:36:44,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:36:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:36:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:36:44,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:36:44,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1523 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:44,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:44,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:36:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:47,344 INFO L124 PetriNetUnfolderBase]: 15446/21595 cut-off events. [2024-06-04 14:36:47,345 INFO L125 PetriNetUnfolderBase]: For 518990/518990 co-relation queries the response was YES. [2024-06-04 14:36:47,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127119 conditions, 21595 events. 15446/21595 cut-off events. For 518990/518990 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 122099 event pairs, 6825 based on Foata normal form. 2/21594 useless extension candidates. Maximal degree in co-relation 127068. Up to 20981 conditions per place. [2024-06-04 14:36:47,531 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 155 selfloop transitions, 14 changer transitions 0/175 dead transitions. [2024-06-04 14:36:47,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 1907 flow [2024-06-04 14:36:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:36:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:36:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 14:36:47,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2024-06-04 14:36:47,533 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1523 flow. Second operand 6 states and 141 transitions. [2024-06-04 14:36:47,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 1907 flow [2024-06-04 14:36:47,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 175 transitions, 1749 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-04 14:36:47,875 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1402 flow [2024-06-04 14:36:47,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1402, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-04 14:36:47,876 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-04 14:36:47,876 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1402 flow [2024-06-04 14:36:47,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:47,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:47,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:47,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:36:47,876 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:36:47,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:47,877 INFO L85 PathProgramCache]: Analyzing trace with hash -242961082, now seen corresponding path program 1 times [2024-06-04 14:36:47,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:47,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048723048] [2024-06-04 14:36:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:47,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:48,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:48,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048723048] [2024-06-04 14:36:48,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048723048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:48,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:48,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:36:48,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746564297] [2024-06-04 14:36:48,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:48,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:36:48,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:36:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:36:48,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 14:36:48,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1402 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:48,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:48,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 14:36:48,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand