./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038_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/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix038_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix038_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-cde23df-m [2024-06-14 12:26:59,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:26:59,073 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:26:59,080 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:26:59,080 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:26:59,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:26:59,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:26:59,100 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:26:59,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:26:59,104 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:26:59,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:26:59,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:26:59,105 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:26:59,106 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:26:59,106 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:26:59,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:26:59,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:26:59,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:26:59,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:26:59,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:26:59,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:26:59,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:26:59,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:26:59,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:26:59,108 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:26:59,109 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:26:59,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:26:59,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:26:59,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:26:59,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:26:59,110 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:26:59,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:26:59,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:26:59,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:26:59,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:26:59,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:26:59,111 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:26:59,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:26:59,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:26:59,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:26:59,112 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:26:59,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:26:59,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:26:59,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:26:59,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:26:59,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:26:59,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:26:59,350 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:26:59,351 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:26:59,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 12:26:59,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:26:59,580 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:26:59,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:27:00,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:27:00,928 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:27:00,936 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:27:00,953 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aad6131d/2ffb25fd0e0f4e4fb7230bf0f600a4c9/FLAG8a4d630a6 [2024-06-14 12:27:00,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aad6131d/2ffb25fd0e0f4e4fb7230bf0f600a4c9 [2024-06-14 12:27:00,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:27:00,971 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:27:00,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:27:00,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:27:00,980 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:27:00,980 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:26:59" (1/2) ... [2024-06-14 12:27:00,981 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5cdfbd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:27:00, skipping insertion in model container [2024-06-14 12:27:00,981 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:26:59" (1/2) ... [2024-06-14 12:27:00,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23f7f505 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:27:00, skipping insertion in model container [2024-06-14 12:27:00,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:27:00" (2/2) ... [2024-06-14 12:27:00,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5cdfbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:00, skipping insertion in model container [2024-06-14 12:27:00,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:27:00" (2/2) ... [2024-06-14 12:27:00,984 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:27:01,081 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:27:01,082 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:27:01,082 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:27:01,082 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:27:01,083 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:27:01,083 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-14 12:27:01,136 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:27:01,563 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:27:01,585 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:27:01,716 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:27:01,753 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:27:01,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01 WrapperNode [2024-06-14 12:27:01,753 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:27:01,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:27:01,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:27:01,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:27:01,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,819 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-14 12:27:01,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:27:01,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:27:01,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:27:01,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:27:01,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,839 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,852 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]. [2024-06-14 12:27:01,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,862 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,867 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:27:01,868 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:27:01,868 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:27:01,868 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:27:01,868 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (1/1) ... [2024-06-14 12:27:01,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:27:01,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:27:01,900 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) [2024-06-14 12:27:01,958 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 [2024-06-14 12:27:01,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:27:01,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:27:01,977 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:27:01,977 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:27:01,977 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:27:01,978 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:27:01,978 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:27:01,978 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:27:01,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:27:01,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:27:01,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:27:01,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:27:01,980 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:27:02,110 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:27:02,112 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:27:02,378 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:27:02,378 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:27:02,515 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:27:02,515 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:27:02,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:27:02 BoogieIcfgContainer [2024-06-14 12:27:02,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:27:02,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:27:02,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:27:02,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:27:02,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:26:59" (1/4) ... [2024-06-14 12:27:02,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e92ecb2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:27:02, skipping insertion in model container [2024-06-14 12:27:02,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:27:00" (2/4) ... [2024-06-14 12:27:02,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e92ecb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:27:02, skipping insertion in model container [2024-06-14 12:27:02,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:27:01" (3/4) ... [2024-06-14 12:27:02,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e92ecb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:27:02, skipping insertion in model container [2024-06-14 12:27:02,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:27:02" (4/4) ... [2024-06-14 12:27:02,521 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:27:02,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:27:02,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:27:02,534 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:27:02,566 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:27:02,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:27:02,607 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:27:02,608 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:27:02,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:27:02,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:27:02,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:27:02,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:27:02,622 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;@793e132, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:27:02,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:27:02,626 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:27:02,626 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:27:02,626 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:27:02,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:02,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:27:02,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:02,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1196790123, now seen corresponding path program 1 times [2024-06-14 12:27:02,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:02,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340918036] [2024-06-14 12:27:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:03,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340918036] [2024-06-14 12:27:03,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340918036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:03,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:03,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:27:03,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371610166] [2024-06-14 12:27:03,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:03,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:27:03,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:27:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:27:03,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:03,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:03,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:03,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:03,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:04,107 INFO L124 PetriNetUnfolderBase]: 1570/2432 cut-off events. [2024-06-14 12:27:04,107 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-14 12:27:04,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 2432 events. 1570/2432 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11895 event pairs, 1123 based on Foata normal form. 1/2364 useless extension candidates. Maximal degree in co-relation 4840. Up to 2334 conditions per place. [2024-06-14 12:27:04,122 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 12:27:04,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 181 flow [2024-06-14 12:27:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:27:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:27:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-14 12:27:04,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 12:27:04,133 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 75 transitions. [2024-06-14 12:27:04,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 181 flow [2024-06-14 12:27:04,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:04,139 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:27:04,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:27:04,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:27:04,143 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:27:04,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:04,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:04,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:04,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:27:04,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:04,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash 935955316, now seen corresponding path program 1 times [2024-06-14 12:27:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041118952] [2024-06-14 12:27:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:04,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:04,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041118952] [2024-06-14 12:27:04,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041118952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:04,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:04,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:27:04,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441360930] [2024-06-14 12:27:04,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:04,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:27:04,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:27:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:27:05,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:05,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2024-06-14 12:27:05,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:05,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:05,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:05,394 INFO L124 PetriNetUnfolderBase]: 1564/2428 cut-off events. [2024-06-14 12:27:05,394 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2024-06-14 12:27:05,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5457 conditions, 2428 events. 1564/2428 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11904 event pairs, 981 based on Foata normal form. 3/2401 useless extension candidates. Maximal degree in co-relation 5442. Up to 2310 conditions per place. [2024-06-14 12:27:05,408 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:27:05,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 248 flow [2024-06-14 12:27:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:27:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:27:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 12:27:05,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 12:27:05,411 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 96 transitions. [2024-06-14 12:27:05,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 248 flow [2024-06-14 12:27:05,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:27:05,414 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:27:05,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:27:05,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:27:05,415 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:27:05,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2024-06-14 12:27:05,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:05,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:05,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:27:05,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:05,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1050155334, now seen corresponding path program 1 times [2024-06-14 12:27:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48406224] [2024-06-14 12:27:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48406224] [2024-06-14 12:27:06,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48406224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:06,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:06,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:27:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780404716] [2024-06-14 12:27:06,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:27:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:27:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:27:06,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:06,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:06,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:06,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:06,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:06,487 INFO L124 PetriNetUnfolderBase]: 1618/2523 cut-off events. [2024-06-14 12:27:06,488 INFO L125 PetriNetUnfolderBase]: For 1322/1322 co-relation queries the response was YES. [2024-06-14 12:27:06,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6276 conditions, 2523 events. 1618/2523 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12430 event pairs, 739 based on Foata normal form. 7/2518 useless extension candidates. Maximal degree in co-relation 6259. Up to 2279 conditions per place. [2024-06-14 12:27:06,530 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-14 12:27:06,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 78 transitions, 410 flow [2024-06-14 12:27:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 12:27:06,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906976744186047 [2024-06-14 12:27:06,532 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 127 transitions. [2024-06-14 12:27:06,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 78 transitions, 410 flow [2024-06-14 12:27:06,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 78 transitions, 396 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:06,534 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 241 flow [2024-06-14 12:27:06,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-14 12:27:06,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:27:06,535 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 241 flow [2024-06-14 12:27:06,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:06,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:06,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:06,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:27:06,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:06,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1804923987, now seen corresponding path program 1 times [2024-06-14 12:27:06,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:06,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684482779] [2024-06-14 12:27:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:06,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:07,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:07,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684482779] [2024-06-14 12:27:07,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684482779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:07,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:07,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:27:07,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596554235] [2024-06-14 12:27:07,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:07,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:27:07,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:27:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:27:07,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:07,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:07,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:07,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:07,668 INFO L124 PetriNetUnfolderBase]: 1640/2560 cut-off events. [2024-06-14 12:27:07,669 INFO L125 PetriNetUnfolderBase]: For 3242/3242 co-relation queries the response was YES. [2024-06-14 12:27:07,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7679 conditions, 2560 events. 1640/2560 cut-off events. For 3242/3242 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12760 event pairs, 559 based on Foata normal form. 7/2558 useless extension candidates. Maximal degree in co-relation 7659. Up to 2222 conditions per place. [2024-06-14 12:27:07,686 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 68 selfloop transitions, 28 changer transitions 0/101 dead transitions. [2024-06-14 12:27:07,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 101 transitions, 639 flow [2024-06-14 12:27:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 12:27:07,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 12:27:07,688 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 241 flow. Second operand 6 states and 153 transitions. [2024-06-14 12:27:07,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 101 transitions, 639 flow [2024-06-14 12:27:07,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 101 transitions, 631 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:27:07,692 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 420 flow [2024-06-14 12:27:07,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-06-14 12:27:07,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-06-14 12:27:07,693 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 420 flow [2024-06-14 12:27:07,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:07,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:07,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:07,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:27:07,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:07,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1600273953, now seen corresponding path program 1 times [2024-06-14 12:27:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:07,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134085922] [2024-06-14 12:27:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:07,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:08,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:08,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134085922] [2024-06-14 12:27:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134085922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:08,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:08,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101921115] [2024-06-14 12:27:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:08,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:08,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:08,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:08,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:08,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:08,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:09,116 INFO L124 PetriNetUnfolderBase]: 1757/2759 cut-off events. [2024-06-14 12:27:09,116 INFO L125 PetriNetUnfolderBase]: For 6477/6477 co-relation queries the response was YES. [2024-06-14 12:27:09,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9733 conditions, 2759 events. 1757/2759 cut-off events. For 6477/6477 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14057 event pairs, 404 based on Foata normal form. 30/2778 useless extension candidates. Maximal degree in co-relation 9707. Up to 2252 conditions per place. [2024-06-14 12:27:09,132 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 86 selfloop transitions, 22 changer transitions 0/113 dead transitions. [2024-06-14 12:27:09,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 113 transitions, 827 flow [2024-06-14 12:27:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 12:27:09,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 12:27:09,133 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 420 flow. Second operand 7 states and 172 transitions. [2024-06-14 12:27:09,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 113 transitions, 827 flow [2024-06-14 12:27:09,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 113 transitions, 803 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-14 12:27:09,139 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 497 flow [2024-06-14 12:27:09,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=497, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-14 12:27:09,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-14 12:27:09,140 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 497 flow [2024-06-14 12:27:09,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:09,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:09,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:09,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:27:09,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:09,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash -317710089, now seen corresponding path program 1 times [2024-06-14 12:27:09,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:09,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207724376] [2024-06-14 12:27:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:09,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:09,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:09,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207724376] [2024-06-14 12:27:09,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207724376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:09,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:09,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:27:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249662437] [2024-06-14 12:27:09,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:09,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:27:09,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:27:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:27:09,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:09,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 497 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:09,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:09,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:09,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:10,209 INFO L124 PetriNetUnfolderBase]: 1747/2750 cut-off events. [2024-06-14 12:27:10,210 INFO L125 PetriNetUnfolderBase]: For 7944/7944 co-relation queries the response was YES. [2024-06-14 12:27:10,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10212 conditions, 2750 events. 1747/2750 cut-off events. For 7944/7944 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14047 event pairs, 618 based on Foata normal form. 4/2746 useless extension candidates. Maximal degree in co-relation 10182. Up to 2607 conditions per place. [2024-06-14 12:27:10,233 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 64 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-14 12:27:10,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 673 flow [2024-06-14 12:27:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-14 12:27:10,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-14 12:27:10,235 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 497 flow. Second operand 5 states and 98 transitions. [2024-06-14 12:27:10,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 673 flow [2024-06-14 12:27:10,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 79 transitions, 625 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:10,242 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 479 flow [2024-06-14 12:27:10,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-14 12:27:10,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-14 12:27:10,256 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 479 flow [2024-06-14 12:27:10,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:10,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:10,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:10,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:27:10,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:10,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:10,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1298468812, now seen corresponding path program 1 times [2024-06-14 12:27:10,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:10,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514720762] [2024-06-14 12:27:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:10,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:10,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:10,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514720762] [2024-06-14 12:27:10,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514720762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:10,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:10,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:10,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943406473] [2024-06-14 12:27:10,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:11,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:11,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:11,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:11,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:11,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:11,495 INFO L124 PetriNetUnfolderBase]: 1759/2761 cut-off events. [2024-06-14 12:27:11,496 INFO L125 PetriNetUnfolderBase]: For 8988/8988 co-relation queries the response was YES. [2024-06-14 12:27:11,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10289 conditions, 2761 events. 1759/2761 cut-off events. For 8988/8988 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14069 event pairs, 550 based on Foata normal form. 8/2756 useless extension candidates. Maximal degree in co-relation 10257. Up to 2505 conditions per place. [2024-06-14 12:27:11,510 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-14 12:27:11,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 769 flow [2024-06-14 12:27:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-14 12:27:11,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-14 12:27:11,512 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 479 flow. Second operand 6 states and 125 transitions. [2024-06-14 12:27:11,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 769 flow [2024-06-14 12:27:11,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 739 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:11,520 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 531 flow [2024-06-14 12:27:11,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=531, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-14 12:27:11,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 12:27:11,522 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 531 flow [2024-06-14 12:27:11,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:11,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:11,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:11,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:27:11,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:11,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:11,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1806303948, now seen corresponding path program 2 times [2024-06-14 12:27:11,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:11,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476463625] [2024-06-14 12:27:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:11,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:12,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:12,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476463625] [2024-06-14 12:27:12,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476463625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:12,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:12,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:12,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443446790] [2024-06-14 12:27:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:12,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:12,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:12,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:12,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 531 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:12,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:12,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:12,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:12,628 INFO L124 PetriNetUnfolderBase]: 1717/2686 cut-off events. [2024-06-14 12:27:12,628 INFO L125 PetriNetUnfolderBase]: For 10161/10161 co-relation queries the response was YES. [2024-06-14 12:27:12,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10273 conditions, 2686 events. 1717/2686 cut-off events. For 10161/10161 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13473 event pairs, 594 based on Foata normal form. 4/2678 useless extension candidates. Maximal degree in co-relation 10241. Up to 2538 conditions per place. [2024-06-14 12:27:12,643 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 71 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-06-14 12:27:12,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 87 transitions, 737 flow [2024-06-14 12:27:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 12:27:12,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-14 12:27:12,644 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 531 flow. Second operand 6 states and 115 transitions. [2024-06-14 12:27:12,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 87 transitions, 737 flow [2024-06-14 12:27:12,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 87 transitions, 708 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:12,659 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 532 flow [2024-06-14 12:27:12,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=532, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-14 12:27:12,660 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 12:27:12,660 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 532 flow [2024-06-14 12:27:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:12,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:12,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:12,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:27:12,660 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:12,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash 293732642, now seen corresponding path program 1 times [2024-06-14 12:27:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:12,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784783299] [2024-06-14 12:27:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:13,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784783299] [2024-06-14 12:27:13,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784783299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:13,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:13,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954363058] [2024-06-14 12:27:13,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:13,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:13,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:13,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 532 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:13,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:13,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:13,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:14,349 INFO L124 PetriNetUnfolderBase]: 2085/3202 cut-off events. [2024-06-14 12:27:14,349 INFO L125 PetriNetUnfolderBase]: For 13907/13907 co-relation queries the response was YES. [2024-06-14 12:27:14,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12248 conditions, 3202 events. 2085/3202 cut-off events. For 13907/13907 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15539 event pairs, 746 based on Foata normal form. 4/3189 useless extension candidates. Maximal degree in co-relation 12215. Up to 3053 conditions per place. [2024-06-14 12:27:14,367 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 77 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2024-06-14 12:27:14,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 814 flow [2024-06-14 12:27:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:27:14,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:27:14,368 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 532 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:27:14,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 814 flow [2024-06-14 12:27:14,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 760 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:14,383 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 573 flow [2024-06-14 12:27:14,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=573, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-14 12:27:14,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 12:27:14,383 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 573 flow [2024-06-14 12:27:14,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:14,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:14,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:14,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:27:14,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:14,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2030526380, now seen corresponding path program 1 times [2024-06-14 12:27:14,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:14,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401929378] [2024-06-14 12:27:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:14,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:14,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:14,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401929378] [2024-06-14 12:27:14,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401929378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:14,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:14,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:27:14,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34283318] [2024-06-14 12:27:14,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:14,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:27:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:27:14,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:27:15,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:15,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 573 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-14 12:27:15,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:15,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:15,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:15,569 INFO L124 PetriNetUnfolderBase]: 2082/3198 cut-off events. [2024-06-14 12:27:15,570 INFO L125 PetriNetUnfolderBase]: For 16094/16094 co-relation queries the response was YES. [2024-06-14 12:27:15,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12759 conditions, 3198 events. 2082/3198 cut-off events. For 16094/16094 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15570 event pairs, 763 based on Foata normal form. 1/3199 useless extension candidates. Maximal degree in co-relation 12725. Up to 3091 conditions per place. [2024-06-14 12:27:15,587 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 75 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-06-14 12:27:15,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 783 flow [2024-06-14 12:27:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 12:27:15,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-14 12:27:15,588 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 573 flow. Second operand 5 states and 89 transitions. [2024-06-14 12:27:15,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 783 flow [2024-06-14 12:27:15,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 742 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:15,601 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 584 flow [2024-06-14 12:27:15,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-14 12:27:15,601 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-14 12:27:15,601 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 584 flow [2024-06-14 12:27:15,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-14 12:27:15,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:15,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:27:15,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:15,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2003183379, now seen corresponding path program 1 times [2024-06-14 12:27:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:15,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37846589] [2024-06-14 12:27:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37846589] [2024-06-14 12:27:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37846589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:16,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:16,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:16,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150807479] [2024-06-14 12:27:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:16,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:16,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:16,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 584 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:16,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:16,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:16,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:17,115 INFO L124 PetriNetUnfolderBase]: 2021/3134 cut-off events. [2024-06-14 12:27:17,115 INFO L125 PetriNetUnfolderBase]: For 18390/18390 co-relation queries the response was YES. [2024-06-14 12:27:17,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12903 conditions, 3134 events. 2021/3134 cut-off events. For 18390/18390 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15905 event pairs, 552 based on Foata normal form. 4/3136 useless extension candidates. Maximal degree in co-relation 12868. Up to 2708 conditions per place. [2024-06-14 12:27:17,131 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 38 changer transitions 0/117 dead transitions. [2024-06-14 12:27:17,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 117 transitions, 1014 flow [2024-06-14 12:27:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 12:27:17,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950166112956811 [2024-06-14 12:27:17,133 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 584 flow. Second operand 7 states and 149 transitions. [2024-06-14 12:27:17,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 117 transitions, 1014 flow [2024-06-14 12:27:17,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 984 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:17,149 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 692 flow [2024-06-14 12:27:17,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=692, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-14 12:27:17,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 12:27:17,149 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 692 flow [2024-06-14 12:27:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:17,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:17,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:17,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:27:17,150 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:17,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:17,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2003273589, now seen corresponding path program 2 times [2024-06-14 12:27:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078836680] [2024-06-14 12:27:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:18,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:18,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078836680] [2024-06-14 12:27:18,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078836680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:18,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:18,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:18,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84573818] [2024-06-14 12:27:18,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:18,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:18,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:18,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:18,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 692 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:18,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:18,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:18,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:18,646 INFO L124 PetriNetUnfolderBase]: 2011/3119 cut-off events. [2024-06-14 12:27:18,646 INFO L125 PetriNetUnfolderBase]: For 21707/21707 co-relation queries the response was YES. [2024-06-14 12:27:18,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13586 conditions, 3119 events. 2011/3119 cut-off events. For 21707/21707 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15773 event pairs, 561 based on Foata normal form. 4/3121 useless extension candidates. Maximal degree in co-relation 13550. Up to 2814 conditions per place. [2024-06-14 12:27:18,696 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 80 selfloop transitions, 24 changer transitions 0/110 dead transitions. [2024-06-14 12:27:18,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 968 flow [2024-06-14 12:27:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 12:27:18,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-14 12:27:18,698 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 692 flow. Second operand 7 states and 141 transitions. [2024-06-14 12:27:18,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 968 flow [2024-06-14 12:27:18,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 110 transitions, 908 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:18,736 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 688 flow [2024-06-14 12:27:18,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2024-06-14 12:27:18,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-14 12:27:18,737 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 688 flow [2024-06-14 12:27:18,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:18,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:18,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:27:18,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:18,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash -660666567, now seen corresponding path program 1 times [2024-06-14 12:27:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072832579] [2024-06-14 12:27:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:19,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:19,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072832579] [2024-06-14 12:27:19,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072832579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:19,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:19,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:19,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657089066] [2024-06-14 12:27:19,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:19,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:19,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:19,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:19,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 688 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 12:27:19,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:19,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:19,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:20,382 INFO L124 PetriNetUnfolderBase]: 2117/3247 cut-off events. [2024-06-14 12:27:20,382 INFO L125 PetriNetUnfolderBase]: For 25125/25125 co-relation queries the response was YES. [2024-06-14 12:27:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14542 conditions, 3247 events. 2117/3247 cut-off events. For 25125/25125 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15714 event pairs, 744 based on Foata normal form. 2/3249 useless extension candidates. Maximal degree in co-relation 14504. Up to 3092 conditions per place. [2024-06-14 12:27:20,433 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 85 selfloop transitions, 19 changer transitions 0/108 dead transitions. [2024-06-14 12:27:20,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 983 flow [2024-06-14 12:27:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:27:20,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:27:20,436 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 688 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:27:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 983 flow [2024-06-14 12:27:20,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 108 transitions, 914 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:20,456 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 710 flow [2024-06-14 12:27:20,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-14 12:27:20,457 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-14 12:27:20,457 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 710 flow [2024-06-14 12:27:20,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 12:27:20,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:20,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:27:20,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:20,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1493384026, now seen corresponding path program 1 times [2024-06-14 12:27:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:20,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443302914] [2024-06-14 12:27:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:21,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443302914] [2024-06-14 12:27:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443302914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:21,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:21,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585819951] [2024-06-14 12:27:21,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:21,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:21,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:21,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 710 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:21,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:21,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:21,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:21,636 INFO L124 PetriNetUnfolderBase]: 2366/3515 cut-off events. [2024-06-14 12:27:21,636 INFO L125 PetriNetUnfolderBase]: For 32127/32127 co-relation queries the response was YES. [2024-06-14 12:27:21,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16157 conditions, 3515 events. 2366/3515 cut-off events. For 32127/32127 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16455 event pairs, 851 based on Foata normal form. 1/3516 useless extension candidates. Maximal degree in co-relation 16118. Up to 3496 conditions per place. [2024-06-14 12:27:21,734 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 86 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2024-06-14 12:27:21,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 100 transitions, 954 flow [2024-06-14 12:27:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 12:27:21,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-14 12:27:21,735 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 710 flow. Second operand 6 states and 97 transitions. [2024-06-14 12:27:21,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 100 transitions, 954 flow [2024-06-14 12:27:21,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 900 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:21,757 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 718 flow [2024-06-14 12:27:21,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=718, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2024-06-14 12:27:21,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-14 12:27:21,758 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 718 flow [2024-06-14 12:27:21,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:21,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:21,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:21,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:27:21,759 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:21,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash -116373369, now seen corresponding path program 1 times [2024-06-14 12:27:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:21,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473199385] [2024-06-14 12:27:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:21,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:22,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:22,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473199385] [2024-06-14 12:27:22,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473199385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:22,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:22,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714735482] [2024-06-14 12:27:22,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:22,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:23,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:23,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:23,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:23,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:23,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:23,570 INFO L124 PetriNetUnfolderBase]: 2280/3541 cut-off events. [2024-06-14 12:27:23,570 INFO L125 PetriNetUnfolderBase]: For 40808/40808 co-relation queries the response was YES. [2024-06-14 12:27:23,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17002 conditions, 3541 events. 2280/3541 cut-off events. For 40808/40808 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18531 event pairs, 418 based on Foata normal form. 16/3550 useless extension candidates. Maximal degree in co-relation 16962. Up to 2566 conditions per place. [2024-06-14 12:27:23,592 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 33 changer transitions 0/137 dead transitions. [2024-06-14 12:27:23,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 137 transitions, 1198 flow [2024-06-14 12:27:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 12:27:23,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-14 12:27:23,594 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 718 flow. Second operand 8 states and 170 transitions. [2024-06-14 12:27:23,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 137 transitions, 1198 flow [2024-06-14 12:27:23,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 137 transitions, 1158 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:23,628 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 784 flow [2024-06-14 12:27:23,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=784, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-14 12:27:23,629 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 12:27:23,629 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 784 flow [2024-06-14 12:27:23,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:23,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:23,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:23,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:27:23,630 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:23,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:23,630 INFO L85 PathProgramCache]: Analyzing trace with hash -116312919, now seen corresponding path program 2 times [2024-06-14 12:27:23,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:23,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750582800] [2024-06-14 12:27:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:23,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750582800] [2024-06-14 12:27:24,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750582800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:24,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:24,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:24,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003653333] [2024-06-14 12:27:24,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:24,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:24,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:24,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:24,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 784 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:24,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:24,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:24,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:25,365 INFO L124 PetriNetUnfolderBase]: 2339/3642 cut-off events. [2024-06-14 12:27:25,365 INFO L125 PetriNetUnfolderBase]: For 47130/47130 co-relation queries the response was YES. [2024-06-14 12:27:25,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17881 conditions, 3642 events. 2339/3642 cut-off events. For 47130/47130 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19305 event pairs, 632 based on Foata normal form. 28/3668 useless extension candidates. Maximal degree in co-relation 17840. Up to 3051 conditions per place. [2024-06-14 12:27:25,387 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 96 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-14 12:27:25,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 1198 flow [2024-06-14 12:27:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:27:25,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-14 12:27:25,389 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 784 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:27:25,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 1198 flow [2024-06-14 12:27:25,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 1155 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:25,421 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 850 flow [2024-06-14 12:27:25,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=850, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-14 12:27:25,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-14 12:27:25,422 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 850 flow [2024-06-14 12:27:25,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:25,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:25,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:27:25,422 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:25,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 938294797, now seen corresponding path program 1 times [2024-06-14 12:27:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:25,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493370050] [2024-06-14 12:27:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:25,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:26,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493370050] [2024-06-14 12:27:26,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493370050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:26,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:26,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:26,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489319388] [2024-06-14 12:27:26,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:26,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:26,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:26,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:26,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:26,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 850 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:26,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:26,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:26,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:26,706 INFO L124 PetriNetUnfolderBase]: 2501/3824 cut-off events. [2024-06-14 12:27:26,706 INFO L125 PetriNetUnfolderBase]: For 49546/49546 co-relation queries the response was YES. [2024-06-14 12:27:26,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19330 conditions, 3824 events. 2501/3824 cut-off events. For 49546/49546 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19082 event pairs, 882 based on Foata normal form. 1/3825 useless extension candidates. Maximal degree in co-relation 19287. Up to 3679 conditions per place. [2024-06-14 12:27:26,725 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 96 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2024-06-14 12:27:26,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 117 transitions, 1202 flow [2024-06-14 12:27:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:27:26,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:27:26,726 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 850 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:27:26,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 117 transitions, 1202 flow [2024-06-14 12:27:26,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 117 transitions, 1127 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:26,762 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 875 flow [2024-06-14 12:27:26,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=875, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-14 12:27:26,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 12:27:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 875 flow [2024-06-14 12:27:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:26,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:27:26,763 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:26,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1420952623, now seen corresponding path program 1 times [2024-06-14 12:27:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:26,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001691294] [2024-06-14 12:27:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001691294] [2024-06-14 12:27:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001691294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:27,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:27,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388107066] [2024-06-14 12:27:27,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:27,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:27,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:27,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 875 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:27,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:27,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:27,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:28,423 INFO L124 PetriNetUnfolderBase]: 2518/3851 cut-off events. [2024-06-14 12:27:28,424 INFO L125 PetriNetUnfolderBase]: For 55072/55072 co-relation queries the response was YES. [2024-06-14 12:27:28,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19769 conditions, 3851 events. 2518/3851 cut-off events. For 55072/55072 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19276 event pairs, 881 based on Foata normal form. 4/3855 useless extension candidates. Maximal degree in co-relation 19725. Up to 3677 conditions per place. [2024-06-14 12:27:28,449 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 16 changer transitions 0/128 dead transitions. [2024-06-14 12:27:28,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 128 transitions, 1215 flow [2024-06-14 12:27:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:27:28,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:27:28,451 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 875 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:27:28,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 128 transitions, 1215 flow [2024-06-14 12:27:28,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1185 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:28,492 INFO L231 Difference]: Finished difference. Result has 100 places, 103 transitions, 918 flow [2024-06-14 12:27:28,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=918, PETRI_PLACES=100, PETRI_TRANSITIONS=103} [2024-06-14 12:27:28,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 12:27:28,492 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 103 transitions, 918 flow [2024-06-14 12:27:28,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:28,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:28,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:28,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:27:28,493 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:28,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1190736703, now seen corresponding path program 2 times [2024-06-14 12:27:28,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110170968] [2024-06-14 12:27:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110170968] [2024-06-14 12:27:29,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110170968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:29,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:29,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:29,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714658969] [2024-06-14 12:27:29,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:29,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:29,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:29,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:29,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 103 transitions, 918 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:29,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:29,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:29,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:30,280 INFO L124 PetriNetUnfolderBase]: 2535/3878 cut-off events. [2024-06-14 12:27:30,281 INFO L125 PetriNetUnfolderBase]: For 61232/61232 co-relation queries the response was YES. [2024-06-14 12:27:30,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20440 conditions, 3878 events. 2535/3878 cut-off events. For 61232/61232 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19440 event pairs, 825 based on Foata normal form. 4/3882 useless extension candidates. Maximal degree in co-relation 20394. Up to 3690 conditions per place. [2024-06-14 12:27:30,303 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 108 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-14 12:27:30,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 130 transitions, 1260 flow [2024-06-14 12:27:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:27:30,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:27:30,320 INFO L175 Difference]: Start difference. First operand has 100 places, 103 transitions, 918 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:27:30,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 130 transitions, 1260 flow [2024-06-14 12:27:30,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1209 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:30,373 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 942 flow [2024-06-14 12:27:30,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=942, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2024-06-14 12:27:30,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 12:27:30,374 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 942 flow [2024-06-14 12:27:30,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:30,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:30,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:30,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:27:30,375 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:30,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1191033621, now seen corresponding path program 1 times [2024-06-14 12:27:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:30,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000336749] [2024-06-14 12:27:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:31,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:31,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000336749] [2024-06-14 12:27:31,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000336749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:31,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:31,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:31,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964509229] [2024-06-14 12:27:31,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:31,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:31,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:31,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:31,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 942 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:31,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:31,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:31,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:31,802 INFO L124 PetriNetUnfolderBase]: 2527/3868 cut-off events. [2024-06-14 12:27:31,802 INFO L125 PetriNetUnfolderBase]: For 66637/66639 co-relation queries the response was YES. [2024-06-14 12:27:31,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20769 conditions, 3868 events. 2527/3868 cut-off events. For 66637/66639 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19457 event pairs, 761 based on Foata normal form. 2/3870 useless extension candidates. Maximal degree in co-relation 20722. Up to 3510 conditions per place. [2024-06-14 12:27:31,827 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 92 selfloop transitions, 33 changer transitions 0/130 dead transitions. [2024-06-14 12:27:31,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 130 transitions, 1262 flow [2024-06-14 12:27:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-14 12:27:31,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-14 12:27:31,830 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 942 flow. Second operand 6 states and 125 transitions. [2024-06-14 12:27:31,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 130 transitions, 1262 flow [2024-06-14 12:27:31,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1201 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:31,890 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 963 flow [2024-06-14 12:27:31,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=963, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2024-06-14 12:27:31,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 12:27:31,891 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 963 flow [2024-06-14 12:27:31,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:31,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:31,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:31,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:27:31,891 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:31,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1264282433, now seen corresponding path program 3 times [2024-06-14 12:27:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264821164] [2024-06-14 12:27:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:32,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:32,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264821164] [2024-06-14 12:27:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264821164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:32,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362068352] [2024-06-14 12:27:32,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:32,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:32,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:32,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:32,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 963 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:32,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:32,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:32,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:33,649 INFO L124 PetriNetUnfolderBase]: 2519/3854 cut-off events. [2024-06-14 12:27:33,649 INFO L125 PetriNetUnfolderBase]: For 72554/72554 co-relation queries the response was YES. [2024-06-14 12:27:33,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21033 conditions, 3854 events. 2519/3854 cut-off events. For 72554/72554 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19283 event pairs, 868 based on Foata normal form. 4/3858 useless extension candidates. Maximal degree in co-relation 20985. Up to 3644 conditions per place. [2024-06-14 12:27:33,673 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 104 selfloop transitions, 23 changer transitions 0/132 dead transitions. [2024-06-14 12:27:33,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 132 transitions, 1315 flow [2024-06-14 12:27:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:27:33,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:27:33,675 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 963 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:27:33,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 132 transitions, 1315 flow [2024-06-14 12:27:33,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 132 transitions, 1249 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:33,729 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 991 flow [2024-06-14 12:27:33,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=991, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-06-14 12:27:33,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 12:27:33,730 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 991 flow [2024-06-14 12:27:33,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:33,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:33,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:33,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:27:33,731 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:33,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:33,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1427208733, now seen corresponding path program 4 times [2024-06-14 12:27:33,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:33,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866867560] [2024-06-14 12:27:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:33,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:34,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:34,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866867560] [2024-06-14 12:27:34,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866867560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:34,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:34,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:34,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874648234] [2024-06-14 12:27:34,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:34,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:34,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:34,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:34,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 991 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:34,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:34,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:35,307 INFO L124 PetriNetUnfolderBase]: 2511/3842 cut-off events. [2024-06-14 12:27:35,308 INFO L125 PetriNetUnfolderBase]: For 78547/78547 co-relation queries the response was YES. [2024-06-14 12:27:35,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21254 conditions, 3842 events. 2511/3842 cut-off events. For 78547/78547 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19165 event pairs, 866 based on Foata normal form. 4/3846 useless extension candidates. Maximal degree in co-relation 21205. Up to 3641 conditions per place. [2024-06-14 12:27:35,330 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2024-06-14 12:27:35,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 138 transitions, 1392 flow [2024-06-14 12:27:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:27:35,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:27:35,332 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 991 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:27:35,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 138 transitions, 1392 flow [2024-06-14 12:27:35,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 138 transitions, 1326 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:35,385 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1055 flow [2024-06-14 12:27:35,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1055, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-14 12:27:35,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 12:27:35,386 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1055 flow [2024-06-14 12:27:35,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:35,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:35,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:35,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:27:35,387 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:35,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash 938623087, now seen corresponding path program 2 times [2024-06-14 12:27:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:35,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381961933] [2024-06-14 12:27:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:35,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:35,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:35,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381961933] [2024-06-14 12:27:35,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381961933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:35,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:35,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:35,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696172264] [2024-06-14 12:27:35,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:35,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:35,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:35,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:36,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:36,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 1055 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:36,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:36,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:36,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:36,660 INFO L124 PetriNetUnfolderBase]: 2508/3838 cut-off events. [2024-06-14 12:27:36,660 INFO L125 PetriNetUnfolderBase]: For 84969/84969 co-relation queries the response was YES. [2024-06-14 12:27:36,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21773 conditions, 3838 events. 2508/3838 cut-off events. For 84969/84969 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19175 event pairs, 871 based on Foata normal form. 1/3839 useless extension candidates. Maximal degree in co-relation 21722. Up to 3712 conditions per place. [2024-06-14 12:27:36,685 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 105 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2024-06-14 12:27:36,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 121 transitions, 1309 flow [2024-06-14 12:27:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:27:36,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:27:36,686 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1055 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:27:36,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 121 transitions, 1309 flow [2024-06-14 12:27:36,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 121 transitions, 1216 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:36,747 INFO L231 Difference]: Finished difference. Result has 110 places, 112 transitions, 990 flow [2024-06-14 12:27:36,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=990, PETRI_PLACES=110, PETRI_TRANSITIONS=112} [2024-06-14 12:27:36,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-14 12:27:36,748 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 112 transitions, 990 flow [2024-06-14 12:27:36,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:36,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:36,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:36,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:27:36,749 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:36,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:36,749 INFO L85 PathProgramCache]: Analyzing trace with hash 944014669, now seen corresponding path program 1 times [2024-06-14 12:27:36,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:36,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209615529] [2024-06-14 12:27:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:36,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:37,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:37,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209615529] [2024-06-14 12:27:37,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209615529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:37,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:37,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967450644] [2024-06-14 12:27:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:37,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:37,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:37,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:37,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:37,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 990 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:37,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:37,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:37,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:38,098 INFO L124 PetriNetUnfolderBase]: 2513/3845 cut-off events. [2024-06-14 12:27:38,098 INFO L125 PetriNetUnfolderBase]: For 90368/90368 co-relation queries the response was YES. [2024-06-14 12:27:38,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21874 conditions, 3845 events. 2513/3845 cut-off events. For 90368/90368 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19244 event pairs, 871 based on Foata normal form. 1/3846 useless extension candidates. Maximal degree in co-relation 21822. Up to 3706 conditions per place. [2024-06-14 12:27:38,126 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 110 selfloop transitions, 16 changer transitions 0/131 dead transitions. [2024-06-14 12:27:38,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 131 transitions, 1372 flow [2024-06-14 12:27:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:27:38,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:27:38,127 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 990 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:27:38,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 131 transitions, 1372 flow [2024-06-14 12:27:38,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 131 transitions, 1340 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:38,179 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 1054 flow [2024-06-14 12:27:38,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1054, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2024-06-14 12:27:38,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 12:27:38,179 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 1054 flow [2024-06-14 12:27:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:38,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:27:38,180 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:38,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:38,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1436811439, now seen corresponding path program 2 times [2024-06-14 12:27:38,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:38,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903789769] [2024-06-14 12:27:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:38,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:38,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903789769] [2024-06-14 12:27:38,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903789769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:38,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:38,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:38,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536283405] [2024-06-14 12:27:38,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:38,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:38,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:38,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:38,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:38,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 1054 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:38,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:38,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:38,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:39,545 INFO L124 PetriNetUnfolderBase]: 2510/3842 cut-off events. [2024-06-14 12:27:39,546 INFO L125 PetriNetUnfolderBase]: For 97774/97776 co-relation queries the response was YES. [2024-06-14 12:27:39,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22496 conditions, 3842 events. 2510/3842 cut-off events. For 97774/97776 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19180 event pairs, 874 based on Foata normal form. 3/3845 useless extension candidates. Maximal degree in co-relation 22443. Up to 3703 conditions per place. [2024-06-14 12:27:39,572 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 106 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2024-06-14 12:27:39,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 127 transitions, 1320 flow [2024-06-14 12:27:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 12:27:39,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:27:39,574 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 1054 flow. Second operand 6 states and 104 transitions. [2024-06-14 12:27:39,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 127 transitions, 1320 flow [2024-06-14 12:27:39,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 127 transitions, 1276 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:39,663 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 1048 flow [2024-06-14 12:27:39,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1048, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2024-06-14 12:27:39,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 12:27:39,663 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 1048 flow [2024-06-14 12:27:39,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:39,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:39,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:39,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:27:39,664 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:39,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 949736525, now seen corresponding path program 1 times [2024-06-14 12:27:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:39,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002513844] [2024-06-14 12:27:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:39,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:40,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:40,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002513844] [2024-06-14 12:27:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002513844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:40,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:40,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238515746] [2024-06-14 12:27:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:40,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:40,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:40,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 1048 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:40,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:40,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:40,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:41,110 INFO L124 PetriNetUnfolderBase]: 2633/3961 cut-off events. [2024-06-14 12:27:41,111 INFO L125 PetriNetUnfolderBase]: For 103061/103061 co-relation queries the response was YES. [2024-06-14 12:27:41,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23047 conditions, 3961 events. 2633/3961 cut-off events. For 103061/103061 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19243 event pairs, 915 based on Foata normal form. 3/3964 useless extension candidates. Maximal degree in co-relation 22992. Up to 3933 conditions per place. [2024-06-14 12:27:41,137 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 116 selfloop transitions, 14 changer transitions 0/133 dead transitions. [2024-06-14 12:27:41,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 133 transitions, 1372 flow [2024-06-14 12:27:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:27:41,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-14 12:27:41,138 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 1048 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:27:41,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 133 transitions, 1372 flow [2024-06-14 12:27:41,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 133 transitions, 1326 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:41,226 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 1078 flow [2024-06-14 12:27:41,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1078, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-06-14 12:27:41,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-14 12:27:41,227 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 1078 flow [2024-06-14 12:27:41,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:41,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:41,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:41,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:27:41,227 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:41,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash -977930223, now seen corresponding path program 1 times [2024-06-14 12:27:41,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:41,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568908737] [2024-06-14 12:27:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:42,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:42,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568908737] [2024-06-14 12:27:42,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568908737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:42,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:42,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:42,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629464492] [2024-06-14 12:27:42,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:42,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:42,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:42,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:42,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 1078 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:42,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:42,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:43,034 INFO L124 PetriNetUnfolderBase]: 2519/3855 cut-off events. [2024-06-14 12:27:43,034 INFO L125 PetriNetUnfolderBase]: For 109624/109626 co-relation queries the response was YES. [2024-06-14 12:27:43,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23176 conditions, 3855 events. 2519/3855 cut-off events. For 109624/109626 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19249 event pairs, 804 based on Foata normal form. 4/3859 useless extension candidates. Maximal degree in co-relation 23121. Up to 3599 conditions per place. [2024-06-14 12:27:43,057 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 120 selfloop transitions, 37 changer transitions 0/162 dead transitions. [2024-06-14 12:27:43,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 162 transitions, 1728 flow [2024-06-14 12:27:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:27:43,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-14 12:27:43,073 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 1078 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:27:43,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 162 transitions, 1728 flow [2024-06-14 12:27:43,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 162 transitions, 1674 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:43,168 INFO L231 Difference]: Finished difference. Result has 120 places, 137 transitions, 1319 flow [2024-06-14 12:27:43,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1319, PETRI_PLACES=120, PETRI_TRANSITIONS=137} [2024-06-14 12:27:43,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 12:27:43,169 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 137 transitions, 1319 flow [2024-06-14 12:27:43,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:43,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:43,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:43,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:27:43,169 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:43,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 60744411, now seen corresponding path program 1 times [2024-06-14 12:27:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132373319] [2024-06-14 12:27:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:44,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:44,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132373319] [2024-06-14 12:27:44,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132373319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:44,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:44,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311791368] [2024-06-14 12:27:44,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:44,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:44,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 137 transitions, 1319 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:44,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:44,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:44,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:44,883 INFO L124 PetriNetUnfolderBase]: 2575/3942 cut-off events. [2024-06-14 12:27:44,884 INFO L125 PetriNetUnfolderBase]: For 119782/119784 co-relation queries the response was YES. [2024-06-14 12:27:44,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24685 conditions, 3942 events. 2575/3942 cut-off events. For 119782/119784 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19751 event pairs, 766 based on Foata normal form. 6/3948 useless extension candidates. Maximal degree in co-relation 24627. Up to 3493 conditions per place. [2024-06-14 12:27:44,912 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 39 changer transitions 0/178 dead transitions. [2024-06-14 12:27:44,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 178 transitions, 1873 flow [2024-06-14 12:27:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:27:44,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:27:44,915 INFO L175 Difference]: Start difference. First operand has 120 places, 137 transitions, 1319 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:27:44,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 178 transitions, 1873 flow [2024-06-14 12:27:45,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 178 transitions, 1805 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:45,014 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1505 flow [2024-06-14 12:27:45,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1505, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-06-14 12:27:45,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 12:27:45,019 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1505 flow [2024-06-14 12:27:45,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:45,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:45,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:45,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:27:45,020 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:45,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash -977631321, now seen corresponding path program 1 times [2024-06-14 12:27:45,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:45,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446419348] [2024-06-14 12:27:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:45,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:45,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:45,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446419348] [2024-06-14 12:27:45,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446419348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:45,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:45,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:45,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910880493] [2024-06-14 12:27:45,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:45,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:45,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:45,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:45,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1505 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:45,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:45,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:45,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:46,346 INFO L124 PetriNetUnfolderBase]: 2712/4079 cut-off events. [2024-06-14 12:27:46,346 INFO L125 PetriNetUnfolderBase]: For 127532/127532 co-relation queries the response was YES. [2024-06-14 12:27:46,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26176 conditions, 4079 events. 2712/4079 cut-off events. For 127532/127532 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19879 event pairs, 860 based on Foata normal form. 1/4080 useless extension candidates. Maximal degree in co-relation 26114. Up to 4030 conditions per place. [2024-06-14 12:27:46,379 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-14 12:27:46,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 171 transitions, 2031 flow [2024-06-14 12:27:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:27:46,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:27:46,381 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1505 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:27:46,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 171 transitions, 2031 flow [2024-06-14 12:27:46,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 171 transitions, 1975 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:46,513 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1599 flow [2024-06-14 12:27:46,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1599, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-14 12:27:46,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 12:27:46,514 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1599 flow [2024-06-14 12:27:46,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:46,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:27:46,515 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:46,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:46,515 INFO L85 PathProgramCache]: Analyzing trace with hash -977631693, now seen corresponding path program 2 times [2024-06-14 12:27:46,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059582032] [2024-06-14 12:27:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:47,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059582032] [2024-06-14 12:27:47,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059582032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:47,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:47,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:47,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855166841] [2024-06-14 12:27:47,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:47,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:47,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:47,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:47,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1599 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:47,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:47,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:47,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:47,992 INFO L124 PetriNetUnfolderBase]: 2724/4165 cut-off events. [2024-06-14 12:27:47,992 INFO L125 PetriNetUnfolderBase]: For 141659/141661 co-relation queries the response was YES. [2024-06-14 12:27:48,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27573 conditions, 4165 events. 2724/4165 cut-off events. For 141659/141661 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 21022 event pairs, 1294 based on Foata normal form. 4/4169 useless extension candidates. Maximal degree in co-relation 27509. Up to 3887 conditions per place. [2024-06-14 12:27:48,020 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 154 selfloop transitions, 44 changer transitions 0/205 dead transitions. [2024-06-14 12:27:48,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 205 transitions, 2559 flow [2024-06-14 12:27:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:27:48,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:27:48,022 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1599 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:27:48,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 205 transitions, 2559 flow [2024-06-14 12:27:48,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 205 transitions, 2500 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:48,195 INFO L231 Difference]: Finished difference. Result has 141 places, 182 transitions, 2013 flow [2024-06-14 12:27:48,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2013, PETRI_PLACES=141, PETRI_TRANSITIONS=182} [2024-06-14 12:27:48,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-14 12:27:48,196 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 182 transitions, 2013 flow [2024-06-14 12:27:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:48,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:48,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:27:48,197 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:48,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1148884215, now seen corresponding path program 3 times [2024-06-14 12:27:48,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:48,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688386171] [2024-06-14 12:27:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:48,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:48,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688386171] [2024-06-14 12:27:48,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688386171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:48,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:48,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027499753] [2024-06-14 12:27:48,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:48,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:48,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:48,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:48,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:48,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 182 transitions, 2013 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:48,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:48,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:48,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:49,751 INFO L124 PetriNetUnfolderBase]: 2805/4276 cut-off events. [2024-06-14 12:27:49,751 INFO L125 PetriNetUnfolderBase]: For 151177/151197 co-relation queries the response was YES. [2024-06-14 12:27:49,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29156 conditions, 4276 events. 2805/4276 cut-off events. For 151177/151197 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 21545 event pairs, 829 based on Foata normal form. 20/4296 useless extension candidates. Maximal degree in co-relation 29087. Up to 3862 conditions per place. [2024-06-14 12:27:49,786 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 148 selfloop transitions, 81 changer transitions 0/236 dead transitions. [2024-06-14 12:27:49,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 236 transitions, 3130 flow [2024-06-14 12:27:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:27:49,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:27:49,787 INFO L175 Difference]: Start difference. First operand has 141 places, 182 transitions, 2013 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:27:49,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 236 transitions, 3130 flow [2024-06-14 12:27:49,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 236 transitions, 3064 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-14 12:27:49,945 INFO L231 Difference]: Finished difference. Result has 151 places, 209 transitions, 2621 flow [2024-06-14 12:27:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2621, PETRI_PLACES=151, PETRI_TRANSITIONS=209} [2024-06-14 12:27:49,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 12:27:49,946 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 209 transitions, 2621 flow [2024-06-14 12:27:49,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:49,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:49,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:49,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:27:49,946 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:49,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash 281550431, now seen corresponding path program 2 times [2024-06-14 12:27:49,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:49,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191517070] [2024-06-14 12:27:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:49,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:50,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:50,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191517070] [2024-06-14 12:27:50,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191517070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:50,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:50,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783186030] [2024-06-14 12:27:50,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:50,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:50,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:50,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:50,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 209 transitions, 2621 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:50,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:50,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:51,800 INFO L124 PetriNetUnfolderBase]: 2797/4267 cut-off events. [2024-06-14 12:27:51,800 INFO L125 PetriNetUnfolderBase]: For 160028/160048 co-relation queries the response was YES. [2024-06-14 12:27:51,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29907 conditions, 4267 events. 2797/4267 cut-off events. For 160028/160048 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21533 event pairs, 813 based on Foata normal form. 22/4289 useless extension candidates. Maximal degree in co-relation 29832. Up to 3645 conditions per place. [2024-06-14 12:27:51,833 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 174 selfloop transitions, 55 changer transitions 0/236 dead transitions. [2024-06-14 12:27:51,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 236 transitions, 3205 flow [2024-06-14 12:27:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:27:51,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 12:27:51,835 INFO L175 Difference]: Start difference. First operand has 151 places, 209 transitions, 2621 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:27:51,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 236 transitions, 3205 flow [2024-06-14 12:27:52,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 236 transitions, 3097 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:52,015 INFO L231 Difference]: Finished difference. Result has 156 places, 213 transitions, 2713 flow [2024-06-14 12:27:52,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2713, PETRI_PLACES=156, PETRI_TRANSITIONS=213} [2024-06-14 12:27:52,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 12:27:52,015 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 213 transitions, 2713 flow [2024-06-14 12:27:52,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:52,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:52,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:52,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:27:52,016 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:52,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:52,016 INFO L85 PathProgramCache]: Analyzing trace with hash 547247711, now seen corresponding path program 3 times [2024-06-14 12:27:52,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475126761] [2024-06-14 12:27:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:52,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:52,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475126761] [2024-06-14 12:27:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475126761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:52,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164765286] [2024-06-14 12:27:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:52,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:52,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:52,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 213 transitions, 2713 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:52,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:52,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:52,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:53,809 INFO L124 PetriNetUnfolderBase]: 2814/4301 cut-off events. [2024-06-14 12:27:53,809 INFO L125 PetriNetUnfolderBase]: For 171376/171378 co-relation queries the response was YES. [2024-06-14 12:27:53,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30621 conditions, 4301 events. 2814/4301 cut-off events. For 171376/171378 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21781 event pairs, 1263 based on Foata normal form. 4/4305 useless extension candidates. Maximal degree in co-relation 30544. Up to 4064 conditions per place. [2024-06-14 12:27:53,850 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 211 selfloop transitions, 18 changer transitions 0/236 dead transitions. [2024-06-14 12:27:53,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 236 transitions, 3265 flow [2024-06-14 12:27:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:27:53,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 12:27:53,851 INFO L175 Difference]: Start difference. First operand has 156 places, 213 transitions, 2713 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:27:53,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 236 transitions, 3265 flow [2024-06-14 12:27:54,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 236 transitions, 3173 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:54,083 INFO L231 Difference]: Finished difference. Result has 160 places, 215 transitions, 2702 flow [2024-06-14 12:27:54,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2623, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2702, PETRI_PLACES=160, PETRI_TRANSITIONS=215} [2024-06-14 12:27:54,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 12:27:54,084 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 215 transitions, 2702 flow [2024-06-14 12:27:54,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:54,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:54,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:54,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:27:54,085 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:54,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 538050941, now seen corresponding path program 4 times [2024-06-14 12:27:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:54,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265724123] [2024-06-14 12:27:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:55,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:55,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265724123] [2024-06-14 12:27:55,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265724123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:55,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:55,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053235091] [2024-06-14 12:27:55,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:55,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:55,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:55,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:55,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 215 transitions, 2702 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:55,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:55,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:55,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:55,914 INFO L124 PetriNetUnfolderBase]: 2831/4321 cut-off events. [2024-06-14 12:27:55,914 INFO L125 PetriNetUnfolderBase]: For 170108/170128 co-relation queries the response was YES. [2024-06-14 12:27:55,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30738 conditions, 4321 events. 2831/4321 cut-off events. For 170108/170128 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21865 event pairs, 808 based on Foata normal form. 20/4341 useless extension candidates. Maximal degree in co-relation 30659. Up to 3607 conditions per place. [2024-06-14 12:27:55,961 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 169 selfloop transitions, 68 changer transitions 0/244 dead transitions. [2024-06-14 12:27:55,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 244 transitions, 3426 flow [2024-06-14 12:27:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:27:55,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:27:55,963 INFO L175 Difference]: Start difference. First operand has 160 places, 215 transitions, 2702 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:27:55,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 244 transitions, 3426 flow [2024-06-14 12:27:56,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 244 transitions, 3365 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:56,251 INFO L231 Difference]: Finished difference. Result has 162 places, 219 transitions, 2867 flow [2024-06-14 12:27:56,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2867, PETRI_PLACES=162, PETRI_TRANSITIONS=219} [2024-06-14 12:27:56,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 12:27:56,252 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 219 transitions, 2867 flow [2024-06-14 12:27:56,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:56,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:56,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:56,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:27:56,253 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:56,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash 538043501, now seen corresponding path program 5 times [2024-06-14 12:27:56,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:56,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54327582] [2024-06-14 12:27:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:56,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:57,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54327582] [2024-06-14 12:27:57,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54327582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:57,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689084231] [2024-06-14 12:27:57,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:57,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:57,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:57,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 219 transitions, 2867 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:57,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:57,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:57,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:58,009 INFO L124 PetriNetUnfolderBase]: 2823/4304 cut-off events. [2024-06-14 12:27:58,009 INFO L125 PetriNetUnfolderBase]: For 178524/178538 co-relation queries the response was YES. [2024-06-14 12:27:58,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31238 conditions, 4304 events. 2823/4304 cut-off events. For 178524/178538 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21758 event pairs, 801 based on Foata normal form. 16/4320 useless extension candidates. Maximal degree in co-relation 31158. Up to 3770 conditions per place. [2024-06-14 12:27:58,056 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 178 selfloop transitions, 62 changer transitions 0/247 dead transitions. [2024-06-14 12:27:58,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 247 transitions, 3445 flow [2024-06-14 12:27:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 12:27:58,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-14 12:27:58,058 INFO L175 Difference]: Start difference. First operand has 162 places, 219 transitions, 2867 flow. Second operand 7 states and 141 transitions. [2024-06-14 12:27:58,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 247 transitions, 3445 flow [2024-06-14 12:27:58,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 247 transitions, 3337 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:58,436 INFO L231 Difference]: Finished difference. Result has 166 places, 220 transitions, 2908 flow [2024-06-14 12:27:58,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2908, PETRI_PLACES=166, PETRI_TRANSITIONS=220} [2024-06-14 12:27:58,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 12:27:58,437 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 220 transitions, 2908 flow [2024-06-14 12:27:58,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:58,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:58,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:58,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:27:58,438 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:58,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -967442241, now seen corresponding path program 2 times [2024-06-14 12:27:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:58,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973721673] [2024-06-14 12:27:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:59,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:59,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973721673] [2024-06-14 12:27:59,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973721673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:59,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:59,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599365149] [2024-06-14 12:27:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:59,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:59,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:59,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:59,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:59,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 220 transitions, 2908 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:59,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:59,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:59,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:59,906 INFO L124 PetriNetUnfolderBase]: 2948/4441 cut-off events. [2024-06-14 12:27:59,906 INFO L125 PetriNetUnfolderBase]: For 186305/186305 co-relation queries the response was YES. [2024-06-14 12:27:59,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32220 conditions, 4441 events. 2948/4441 cut-off events. For 186305/186305 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22067 event pairs, 1368 based on Foata normal form. 1/4442 useless extension candidates. Maximal degree in co-relation 32138. Up to 4397 conditions per place. [2024-06-14 12:27:59,964 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 214 selfloop transitions, 15 changer transitions 0/232 dead transitions. [2024-06-14 12:27:59,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 232 transitions, 3442 flow [2024-06-14 12:27:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:27:59,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-14 12:27:59,965 INFO L175 Difference]: Start difference. First operand has 166 places, 220 transitions, 2908 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:27:59,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 232 transitions, 3442 flow [2024-06-14 12:28:00,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 232 transitions, 3303 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:00,334 INFO L231 Difference]: Finished difference. Result has 167 places, 223 transitions, 2863 flow [2024-06-14 12:28:00,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2863, PETRI_PLACES=167, PETRI_TRANSITIONS=223} [2024-06-14 12:28:00,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 12:28:00,335 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 223 transitions, 2863 flow [2024-06-14 12:28:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:00,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:00,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:28:00,335 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:00,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1774070571, now seen corresponding path program 3 times [2024-06-14 12:28:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:00,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115709910] [2024-06-14 12:28:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:00,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:00,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:00,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115709910] [2024-06-14 12:28:00,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115709910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:00,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:00,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:00,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165510252] [2024-06-14 12:28:00,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:00,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:00,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:00,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:00,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:01,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:01,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 223 transitions, 2863 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:01,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:01,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:01,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:01,790 INFO L124 PetriNetUnfolderBase]: 2945/4437 cut-off events. [2024-06-14 12:28:01,791 INFO L125 PetriNetUnfolderBase]: For 193327/193327 co-relation queries the response was YES. [2024-06-14 12:28:01,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32093 conditions, 4437 events. 2945/4437 cut-off events. For 193327/193327 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22023 event pairs, 1373 based on Foata normal form. 1/4438 useless extension candidates. Maximal degree in co-relation 32010. Up to 4387 conditions per place. [2024-06-14 12:28:01,838 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 209 selfloop transitions, 20 changer transitions 0/232 dead transitions. [2024-06-14 12:28:01,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 232 transitions, 3345 flow [2024-06-14 12:28:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:28:01,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-14 12:28:01,839 INFO L175 Difference]: Start difference. First operand has 167 places, 223 transitions, 2863 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:28:01,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 232 transitions, 3345 flow [2024-06-14 12:28:02,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 232 transitions, 3253 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:02,164 INFO L231 Difference]: Finished difference. Result has 169 places, 223 transitions, 2817 flow [2024-06-14 12:28:02,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2817, PETRI_PLACES=169, PETRI_TRANSITIONS=223} [2024-06-14 12:28:02,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 12:28:02,165 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 223 transitions, 2817 flow [2024-06-14 12:28:02,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:02,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:02,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:02,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:28:02,165 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:02,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:02,166 INFO L85 PathProgramCache]: Analyzing trace with hash -623368653, now seen corresponding path program 4 times [2024-06-14 12:28:02,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:02,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336271815] [2024-06-14 12:28:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:02,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:02,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336271815] [2024-06-14 12:28:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336271815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:02,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103636171] [2024-06-14 12:28:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:02,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:02,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 223 transitions, 2817 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:02,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:02,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:02,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:03,632 INFO L124 PetriNetUnfolderBase]: 2821/4313 cut-off events. [2024-06-14 12:28:03,633 INFO L125 PetriNetUnfolderBase]: For 202985/202987 co-relation queries the response was YES. [2024-06-14 12:28:03,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31687 conditions, 4313 events. 2821/4313 cut-off events. For 202985/202987 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21892 event pairs, 1301 based on Foata normal form. 4/4317 useless extension candidates. Maximal degree in co-relation 31603. Up to 4127 conditions per place. [2024-06-14 12:28:03,677 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 199 selfloop transitions, 26 changer transitions 0/233 dead transitions. [2024-06-14 12:28:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 233 transitions, 3365 flow [2024-06-14 12:28:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:28:03,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:28:03,679 INFO L175 Difference]: Start difference. First operand has 169 places, 223 transitions, 2817 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:28:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 233 transitions, 3365 flow [2024-06-14 12:28:04,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 233 transitions, 3276 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:04,046 INFO L231 Difference]: Finished difference. Result has 170 places, 223 transitions, 2788 flow [2024-06-14 12:28:04,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=170, PETRI_TRANSITIONS=223} [2024-06-14 12:28:04,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 12:28:04,047 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 223 transitions, 2788 flow [2024-06-14 12:28:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:04,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:04,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:04,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:28:04,048 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:04,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1695746429, now seen corresponding path program 1 times [2024-06-14 12:28:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:04,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582523349] [2024-06-14 12:28:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:04,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582523349] [2024-06-14 12:28:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582523349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:04,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057387125] [2024-06-14 12:28:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:04,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:04,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 223 transitions, 2788 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:04,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:04,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:04,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:05,785 INFO L124 PetriNetUnfolderBase]: 2831/4326 cut-off events. [2024-06-14 12:28:05,785 INFO L125 PetriNetUnfolderBase]: For 212997/212997 co-relation queries the response was YES. [2024-06-14 12:28:05,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32032 conditions, 4326 events. 2831/4326 cut-off events. For 212997/212997 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21979 event pairs, 1296 based on Foata normal form. 2/4328 useless extension candidates. Maximal degree in co-relation 31947. Up to 4146 conditions per place. [2024-06-14 12:28:05,827 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 217 selfloop transitions, 17 changer transitions 0/242 dead transitions. [2024-06-14 12:28:05,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 242 transitions, 3340 flow [2024-06-14 12:28:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:28:05,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 12:28:05,829 INFO L175 Difference]: Start difference. First operand has 170 places, 223 transitions, 2788 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:28:05,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 242 transitions, 3340 flow [2024-06-14 12:28:06,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 242 transitions, 3245 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:06,119 INFO L231 Difference]: Finished difference. Result has 172 places, 226 transitions, 2776 flow [2024-06-14 12:28:06,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2776, PETRI_PLACES=172, PETRI_TRANSITIONS=226} [2024-06-14 12:28:06,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 12:28:06,120 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 226 transitions, 2776 flow [2024-06-14 12:28:06,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:06,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:06,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:28:06,121 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:06,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash -800315289, now seen corresponding path program 1 times [2024-06-14 12:28:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:06,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682666401] [2024-06-14 12:28:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:06,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:06,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:06,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682666401] [2024-06-14 12:28:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682666401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:06,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:06,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376386334] [2024-06-14 12:28:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:06,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:06,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 226 transitions, 2776 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:06,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:06,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:06,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:08,054 INFO L124 PetriNetUnfolderBase]: 2956/4453 cut-off events. [2024-06-14 12:28:08,054 INFO L125 PetriNetUnfolderBase]: For 221058/221058 co-relation queries the response was YES. [2024-06-14 12:28:08,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33032 conditions, 4453 events. 2956/4453 cut-off events. For 221058/221058 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22110 event pairs, 1371 based on Foata normal form. 1/4454 useless extension candidates. Maximal degree in co-relation 32947. Up to 4388 conditions per place. [2024-06-14 12:28:08,112 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 218 selfloop transitions, 24 changer transitions 0/245 dead transitions. [2024-06-14 12:28:08,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 245 transitions, 3440 flow [2024-06-14 12:28:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:28:08,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:28:08,114 INFO L175 Difference]: Start difference. First operand has 172 places, 226 transitions, 2776 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:28:08,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 245 transitions, 3440 flow [2024-06-14 12:28:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 245 transitions, 3357 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:08,631 INFO L231 Difference]: Finished difference. Result has 173 places, 232 transitions, 2821 flow [2024-06-14 12:28:08,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2821, PETRI_PLACES=173, PETRI_TRANSITIONS=232} [2024-06-14 12:28:08,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 12:28:08,641 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 232 transitions, 2821 flow [2024-06-14 12:28:08,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:08,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:08,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:08,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:28:08,641 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:08,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash -800315475, now seen corresponding path program 2 times [2024-06-14 12:28:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:08,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083885173] [2024-06-14 12:28:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:08,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:09,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083885173] [2024-06-14 12:28:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083885173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424795710] [2024-06-14 12:28:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:09,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:09,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:09,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 232 transitions, 2821 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:09,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:09,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:09,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:10,562 INFO L124 PetriNetUnfolderBase]: 2858/4359 cut-off events. [2024-06-14 12:28:10,563 INFO L125 PetriNetUnfolderBase]: For 234279/234279 co-relation queries the response was YES. [2024-06-14 12:28:10,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33035 conditions, 4359 events. 2858/4359 cut-off events. For 234279/234279 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22078 event pairs, 1297 based on Foata normal form. 2/4361 useless extension candidates. Maximal degree in co-relation 32950. Up to 4153 conditions per place. [2024-06-14 12:28:10,597 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 215 selfloop transitions, 29 changer transitions 0/254 dead transitions. [2024-06-14 12:28:10,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 254 transitions, 3523 flow [2024-06-14 12:28:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:28:10,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:28:10,600 INFO L175 Difference]: Start difference. First operand has 173 places, 232 transitions, 2821 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:28:10,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 254 transitions, 3523 flow [2024-06-14 12:28:10,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 254 transitions, 3476 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:10,926 INFO L231 Difference]: Finished difference. Result has 177 places, 238 transitions, 2932 flow [2024-06-14 12:28:10,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2932, PETRI_PLACES=177, PETRI_TRANSITIONS=238} [2024-06-14 12:28:10,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 12:28:10,927 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 238 transitions, 2932 flow [2024-06-14 12:28:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:10,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:10,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:10,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:28:10,927 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:10,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1591719843, now seen corresponding path program 2 times [2024-06-14 12:28:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:10,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112152273] [2024-06-14 12:28:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:11,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:11,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112152273] [2024-06-14 12:28:11,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112152273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:11,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:11,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:11,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139623109] [2024-06-14 12:28:11,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:11,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:11,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:11,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:11,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:11,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:11,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 238 transitions, 2932 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:11,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:11,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:11,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:12,647 INFO L124 PetriNetUnfolderBase]: 2971/4475 cut-off events. [2024-06-14 12:28:12,648 INFO L125 PetriNetUnfolderBase]: For 244770/244772 co-relation queries the response was YES. [2024-06-14 12:28:12,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34219 conditions, 4475 events. 2971/4475 cut-off events. For 244770/244772 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22233 event pairs, 1368 based on Foata normal form. 3/4478 useless extension candidates. Maximal degree in co-relation 34132. Up to 4408 conditions per place. [2024-06-14 12:28:12,698 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 220 selfloop transitions, 28 changer transitions 0/251 dead transitions. [2024-06-14 12:28:12,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 3570 flow [2024-06-14 12:28:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:28:12,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 12:28:12,700 INFO L175 Difference]: Start difference. First operand has 177 places, 238 transitions, 2932 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:28:12,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 3570 flow [2024-06-14 12:28:13,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 251 transitions, 3514 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:13,158 INFO L231 Difference]: Finished difference. Result has 181 places, 241 transitions, 2974 flow [2024-06-14 12:28:13,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2974, PETRI_PLACES=181, PETRI_TRANSITIONS=241} [2024-06-14 12:28:13,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 12:28:13,159 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 241 transitions, 2974 flow [2024-06-14 12:28:13,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:13,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:13,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:13,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:28:13,159 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:13,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash -716558087, now seen corresponding path program 3 times [2024-06-14 12:28:13,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:13,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053430360] [2024-06-14 12:28:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:13,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:13,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:13,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053430360] [2024-06-14 12:28:13,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053430360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:13,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:13,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:13,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846724156] [2024-06-14 12:28:13,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:13,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:13,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:13,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:13,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:13,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 241 transitions, 2974 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:13,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:13,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:13,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:14,889 INFO L124 PetriNetUnfolderBase]: 2968/4471 cut-off events. [2024-06-14 12:28:14,890 INFO L125 PetriNetUnfolderBase]: For 254371/254373 co-relation queries the response was YES. [2024-06-14 12:28:14,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34412 conditions, 4471 events. 2968/4471 cut-off events. For 254371/254373 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22202 event pairs, 1368 based on Foata normal form. 3/4474 useless extension candidates. Maximal degree in co-relation 34323. Up to 4405 conditions per place. [2024-06-14 12:28:14,928 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 220 selfloop transitions, 27 changer transitions 0/250 dead transitions. [2024-06-14 12:28:14,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 250 transitions, 3492 flow [2024-06-14 12:28:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:28:14,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 12:28:14,930 INFO L175 Difference]: Start difference. First operand has 181 places, 241 transitions, 2974 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:28:14,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 250 transitions, 3492 flow [2024-06-14 12:28:15,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 250 transitions, 3404 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:15,314 INFO L231 Difference]: Finished difference. Result has 184 places, 241 transitions, 2946 flow [2024-06-14 12:28:15,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2946, PETRI_PLACES=184, PETRI_TRANSITIONS=241} [2024-06-14 12:28:15,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:28:15,315 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 241 transitions, 2946 flow [2024-06-14 12:28:15,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:15,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:15,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:15,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:28:15,316 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:15,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash -623183955, now seen corresponding path program 3 times [2024-06-14 12:28:15,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:15,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801807600] [2024-06-14 12:28:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:16,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:16,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801807600] [2024-06-14 12:28:16,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801807600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:16,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:16,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:16,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071342374] [2024-06-14 12:28:16,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:16,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:16,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:16,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:16,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 241 transitions, 2946 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:16,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:16,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:16,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:17,070 INFO L124 PetriNetUnfolderBase]: 2854/4356 cut-off events. [2024-06-14 12:28:17,070 INFO L125 PetriNetUnfolderBase]: For 265726/265728 co-relation queries the response was YES. [2024-06-14 12:28:17,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34029 conditions, 4356 events. 2854/4356 cut-off events. For 265726/265728 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22097 event pairs, 1307 based on Foata normal form. 2/4358 useless extension candidates. Maximal degree in co-relation 33939. Up to 4150 conditions per place. [2024-06-14 12:28:17,112 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 212 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-14 12:28:17,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 252 transitions, 3460 flow [2024-06-14 12:28:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:28:17,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:28:17,114 INFO L175 Difference]: Start difference. First operand has 184 places, 241 transitions, 2946 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:28:17,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 252 transitions, 3460 flow [2024-06-14 12:28:17,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 252 transitions, 3364 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:17,477 INFO L231 Difference]: Finished difference. Result has 184 places, 241 transitions, 2914 flow [2024-06-14 12:28:17,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2914, PETRI_PLACES=184, PETRI_TRANSITIONS=241} [2024-06-14 12:28:17,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:28:17,477 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 241 transitions, 2914 flow [2024-06-14 12:28:17,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:17,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:17,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:28:17,478 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:17,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash -996124454, now seen corresponding path program 1 times [2024-06-14 12:28:17,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864264835] [2024-06-14 12:28:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:18,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864264835] [2024-06-14 12:28:18,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864264835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:18,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:18,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:18,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276527141] [2024-06-14 12:28:18,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:18,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:18,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:18,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:18,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:18,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 241 transitions, 2914 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:18,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:18,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:18,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:19,409 INFO L124 PetriNetUnfolderBase]: 2943/4478 cut-off events. [2024-06-14 12:28:19,410 INFO L125 PetriNetUnfolderBase]: For 277226/277238 co-relation queries the response was YES. [2024-06-14 12:28:19,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35162 conditions, 4478 events. 2943/4478 cut-off events. For 277226/277238 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22703 event pairs, 792 based on Foata normal form. 14/4492 useless extension candidates. Maximal degree in co-relation 35071. Up to 3853 conditions per place. [2024-06-14 12:28:19,452 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 196 selfloop transitions, 98 changer transitions 0/305 dead transitions. [2024-06-14 12:28:19,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 305 transitions, 4188 flow [2024-06-14 12:28:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:28:19,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 12:28:19,455 INFO L175 Difference]: Start difference. First operand has 184 places, 241 transitions, 2914 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:28:19,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 305 transitions, 4188 flow [2024-06-14 12:28:19,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 305 transitions, 4093 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:19,899 INFO L231 Difference]: Finished difference. Result has 188 places, 273 transitions, 3522 flow [2024-06-14 12:28:19,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3522, PETRI_PLACES=188, PETRI_TRANSITIONS=273} [2024-06-14 12:28:19,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-14 12:28:19,900 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 273 transitions, 3522 flow [2024-06-14 12:28:19,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:19,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:19,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:19,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:28:19,900 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:19,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 759066950, now seen corresponding path program 2 times [2024-06-14 12:28:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79637178] [2024-06-14 12:28:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:20,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79637178] [2024-06-14 12:28:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79637178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:20,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335606052] [2024-06-14 12:28:20,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:20,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:20,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:20,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:20,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:20,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:20,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 273 transitions, 3522 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:20,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:20,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:20,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:22,078 INFO L124 PetriNetUnfolderBase]: 3028/4606 cut-off events. [2024-06-14 12:28:22,078 INFO L125 PetriNetUnfolderBase]: For 296369/296397 co-relation queries the response was YES. [2024-06-14 12:28:22,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37778 conditions, 4606 events. 3028/4606 cut-off events. For 296369/296397 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23587 event pairs, 1011 based on Foata normal form. 28/4634 useless extension candidates. Maximal degree in co-relation 37684. Up to 4061 conditions per place. [2024-06-14 12:28:22,124 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 211 selfloop transitions, 116 changer transitions 0/338 dead transitions. [2024-06-14 12:28:22,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 338 transitions, 5067 flow [2024-06-14 12:28:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:28:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:28:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:28:22,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-14 12:28:22,126 INFO L175 Difference]: Start difference. First operand has 188 places, 273 transitions, 3522 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:28:22,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 338 transitions, 5067 flow [2024-06-14 12:28:22,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 338 transitions, 4902 flow, removed 75 selfloop flow, removed 2 redundant places. [2024-06-14 12:28:22,681 INFO L231 Difference]: Finished difference. Result has 200 places, 305 transitions, 4251 flow [2024-06-14 12:28:22,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3435, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4251, PETRI_PLACES=200, PETRI_TRANSITIONS=305} [2024-06-14 12:28:22,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 12:28:22,682 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 305 transitions, 4251 flow [2024-06-14 12:28:22,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:22,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:22,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:22,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:28:22,682 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:22,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash -546085249, now seen corresponding path program 1 times [2024-06-14 12:28:22,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:22,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285743914] [2024-06-14 12:28:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:22,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:23,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:23,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285743914] [2024-06-14 12:28:23,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285743914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:23,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:23,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:23,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209298618] [2024-06-14 12:28:23,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:23,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:23,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:23,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:23,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 305 transitions, 4251 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:23,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:23,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:23,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:24,419 INFO L124 PetriNetUnfolderBase]: 3155/4742 cut-off events. [2024-06-14 12:28:24,420 INFO L125 PetriNetUnfolderBase]: For 309212/309222 co-relation queries the response was YES. [2024-06-14 12:28:24,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39378 conditions, 4742 events. 3155/4742 cut-off events. For 309212/309222 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23827 event pairs, 1063 based on Foata normal form. 12/4754 useless extension candidates. Maximal degree in co-relation 39278. Up to 4255 conditions per place. [2024-06-14 12:28:24,468 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 221 selfloop transitions, 122 changer transitions 0/346 dead transitions. [2024-06-14 12:28:24,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 346 transitions, 5408 flow [2024-06-14 12:28:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:28:24,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:28:24,470 INFO L175 Difference]: Start difference. First operand has 200 places, 305 transitions, 4251 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:28:24,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 346 transitions, 5408 flow [2024-06-14 12:28:24,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 346 transitions, 5316 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:24,916 INFO L231 Difference]: Finished difference. Result has 208 places, 320 transitions, 4753 flow [2024-06-14 12:28:24,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4753, PETRI_PLACES=208, PETRI_TRANSITIONS=320} [2024-06-14 12:28:24,917 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-14 12:28:24,917 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 320 transitions, 4753 flow [2024-06-14 12:28:24,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:24,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:24,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:28:24,917 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:24,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 180313000, now seen corresponding path program 1 times [2024-06-14 12:28:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534919385] [2024-06-14 12:28:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:24,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534919385] [2024-06-14 12:28:25,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534919385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:25,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:25,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043700234] [2024-06-14 12:28:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:25,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:25,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:25,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 320 transitions, 4753 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:25,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:25,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:25,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:26,675 INFO L124 PetriNetUnfolderBase]: 3108/4716 cut-off events. [2024-06-14 12:28:26,676 INFO L125 PetriNetUnfolderBase]: For 335481/335505 co-relation queries the response was YES. [2024-06-14 12:28:26,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41420 conditions, 4716 events. 3108/4716 cut-off events. For 335481/335505 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24124 event pairs, 1018 based on Foata normal form. 26/4742 useless extension candidates. Maximal degree in co-relation 41316. Up to 4209 conditions per place. [2024-06-14 12:28:26,728 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 237 selfloop transitions, 111 changer transitions 0/362 dead transitions. [2024-06-14 12:28:26,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 362 transitions, 6192 flow [2024-06-14 12:28:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:28:26,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 12:28:26,730 INFO L175 Difference]: Start difference. First operand has 208 places, 320 transitions, 4753 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:28:26,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 362 transitions, 6192 flow [2024-06-14 12:28:27,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 362 transitions, 6101 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-14 12:28:27,324 INFO L231 Difference]: Finished difference. Result has 216 places, 338 transitions, 5380 flow [2024-06-14 12:28:27,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5380, PETRI_PLACES=216, PETRI_TRANSITIONS=338} [2024-06-14 12:28:27,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 12:28:27,325 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 338 transitions, 5380 flow [2024-06-14 12:28:27,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:27,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:27,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:27,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:28:27,325 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:27,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:27,326 INFO L85 PathProgramCache]: Analyzing trace with hash 567454650, now seen corresponding path program 1 times [2024-06-14 12:28:27,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:27,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156213085] [2024-06-14 12:28:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:27,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:28,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:28,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156213085] [2024-06-14 12:28:28,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156213085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:28,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:28,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:28:28,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933030598] [2024-06-14 12:28:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:28,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:28:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:28:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:28:28,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:28,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 338 transitions, 5380 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:28:28,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:28,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:28,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:30,114 INFO L124 PetriNetUnfolderBase]: 3600/5504 cut-off events. [2024-06-14 12:28:30,114 INFO L125 PetriNetUnfolderBase]: For 357673/357697 co-relation queries the response was YES. [2024-06-14 12:28:30,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46764 conditions, 5504 events. 3600/5504 cut-off events. For 357673/357697 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29414 event pairs, 996 based on Foata normal form. 32/5536 useless extension candidates. Maximal degree in co-relation 46656. Up to 4335 conditions per place. [2024-06-14 12:28:30,183 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 313 selfloop transitions, 111 changer transitions 0/438 dead transitions. [2024-06-14 12:28:30,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 438 transitions, 7103 flow [2024-06-14 12:28:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:28:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:28:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-14 12:28:30,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-14 12:28:30,185 INFO L175 Difference]: Start difference. First operand has 216 places, 338 transitions, 5380 flow. Second operand 11 states and 213 transitions. [2024-06-14 12:28:30,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 438 transitions, 7103 flow [2024-06-14 12:28:30,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 438 transitions, 6924 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:31,003 INFO L231 Difference]: Finished difference. Result has 227 places, 381 transitions, 6130 flow [2024-06-14 12:28:31,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6130, PETRI_PLACES=227, PETRI_TRANSITIONS=381} [2024-06-14 12:28:31,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 12:28:31,004 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 381 transitions, 6130 flow [2024-06-14 12:28:31,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:28:31,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:31,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:28:31,005 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:31,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 768594118, now seen corresponding path program 2 times [2024-06-14 12:28:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:31,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163494313] [2024-06-14 12:28:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163494313] [2024-06-14 12:28:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163494313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:31,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891193857] [2024-06-14 12:28:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:31,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:31,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:31,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:31,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 381 transitions, 6130 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:31,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:31,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:33,221 INFO L124 PetriNetUnfolderBase]: 3586/5480 cut-off events. [2024-06-14 12:28:33,221 INFO L125 PetriNetUnfolderBase]: For 365203/365227 co-relation queries the response was YES. [2024-06-14 12:28:33,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47365 conditions, 5480 events. 3586/5480 cut-off events. For 365203/365227 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29361 event pairs, 1121 based on Foata normal form. 26/5506 useless extension candidates. Maximal degree in co-relation 47252. Up to 4962 conditions per place. [2024-06-14 12:28:33,320 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 274 selfloop transitions, 113 changer transitions 0/401 dead transitions. [2024-06-14 12:28:33,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 401 transitions, 7160 flow [2024-06-14 12:28:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:28:33,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:28:33,322 INFO L175 Difference]: Start difference. First operand has 227 places, 381 transitions, 6130 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:28:33,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 401 transitions, 7160 flow [2024-06-14 12:28:34,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 401 transitions, 6972 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:34,414 INFO L231 Difference]: Finished difference. Result has 231 places, 381 transitions, 6184 flow [2024-06-14 12:28:34,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6184, PETRI_PLACES=231, PETRI_TRANSITIONS=381} [2024-06-14 12:28:34,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 12:28:34,415 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 381 transitions, 6184 flow [2024-06-14 12:28:34,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:34,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:34,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:34,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:28:34,416 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:34,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash 96779525, now seen corresponding path program 2 times [2024-06-14 12:28:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:34,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329639437] [2024-06-14 12:28:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:35,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:35,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329639437] [2024-06-14 12:28:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329639437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:35,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:35,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:35,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857966413] [2024-06-14 12:28:35,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:35,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:35,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:35,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:35,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:35,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 381 transitions, 6184 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:35,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:35,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:35,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:36,651 INFO L124 PetriNetUnfolderBase]: 3740/5653 cut-off events. [2024-06-14 12:28:36,651 INFO L125 PetriNetUnfolderBase]: For 379165/379175 co-relation queries the response was YES. [2024-06-14 12:28:36,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48458 conditions, 5653 events. 3740/5653 cut-off events. For 379165/379175 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29898 event pairs, 1174 based on Foata normal form. 12/5665 useless extension candidates. Maximal degree in co-relation 48345. Up to 5095 conditions per place. [2024-06-14 12:28:36,711 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 288 selfloop transitions, 134 changer transitions 0/425 dead transitions. [2024-06-14 12:28:36,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 425 transitions, 7612 flow [2024-06-14 12:28:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:28:36,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:28:36,713 INFO L175 Difference]: Start difference. First operand has 231 places, 381 transitions, 6184 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:28:36,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 425 transitions, 7612 flow [2024-06-14 12:28:37,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 425 transitions, 7481 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:37,439 INFO L231 Difference]: Finished difference. Result has 237 places, 399 transitions, 6605 flow [2024-06-14 12:28:37,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6053, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6605, PETRI_PLACES=237, PETRI_TRANSITIONS=399} [2024-06-14 12:28:37,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 12:28:37,440 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 399 transitions, 6605 flow [2024-06-14 12:28:37,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:37,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:37,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:37,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:28:37,441 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:37,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1255673341, now seen corresponding path program 3 times [2024-06-14 12:28:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:37,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784189559] [2024-06-14 12:28:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:37,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:38,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:38,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784189559] [2024-06-14 12:28:38,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784189559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:38,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:38,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:38,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467489274] [2024-06-14 12:28:38,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:38,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:38,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:38,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 399 transitions, 6605 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:38,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:38,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:38,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:39,501 INFO L124 PetriNetUnfolderBase]: 3752/5673 cut-off events. [2024-06-14 12:28:39,501 INFO L125 PetriNetUnfolderBase]: For 395002/395026 co-relation queries the response was YES. [2024-06-14 12:28:39,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49189 conditions, 5673 events. 3752/5673 cut-off events. For 395002/395026 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29952 event pairs, 1170 based on Foata normal form. 24/5697 useless extension candidates. Maximal degree in co-relation 49074. Up to 5108 conditions per place. [2024-06-14 12:28:39,567 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 288 selfloop transitions, 135 changer transitions 0/426 dead transitions. [2024-06-14 12:28:39,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 426 transitions, 7888 flow [2024-06-14 12:28:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:28:39,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:28:39,568 INFO L175 Difference]: Start difference. First operand has 237 places, 399 transitions, 6605 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:28:39,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 426 transitions, 7888 flow [2024-06-14 12:28:40,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 426 transitions, 7737 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:40,396 INFO L231 Difference]: Finished difference. Result has 243 places, 403 transitions, 6796 flow [2024-06-14 12:28:40,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6796, PETRI_PLACES=243, PETRI_TRANSITIONS=403} [2024-06-14 12:28:40,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 12:28:40,397 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 403 transitions, 6796 flow [2024-06-14 12:28:40,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:40,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:40,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:40,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:28:40,398 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:40,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1239585860, now seen corresponding path program 3 times [2024-06-14 12:28:40,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:40,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999226288] [2024-06-14 12:28:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:40,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:41,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:41,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999226288] [2024-06-14 12:28:41,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999226288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:41,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:41,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:41,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807969473] [2024-06-14 12:28:41,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:41,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:41,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:41,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:41,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 403 transitions, 6796 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:41,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:41,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:41,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:42,968 INFO L124 PetriNetUnfolderBase]: 3651/5571 cut-off events. [2024-06-14 12:28:42,968 INFO L125 PetriNetUnfolderBase]: For 410050/410074 co-relation queries the response was YES. [2024-06-14 12:28:43,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48948 conditions, 5571 events. 3651/5571 cut-off events. For 410050/410074 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29853 event pairs, 1111 based on Foata normal form. 24/5595 useless extension candidates. Maximal degree in co-relation 48832. Up to 5015 conditions per place. [2024-06-14 12:28:43,071 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 287 selfloop transitions, 118 changer transitions 0/425 dead transitions. [2024-06-14 12:28:43,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 425 transitions, 7884 flow [2024-06-14 12:28:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:28:43,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:28:43,073 INFO L175 Difference]: Start difference. First operand has 243 places, 403 transitions, 6796 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:28:43,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 425 transitions, 7884 flow [2024-06-14 12:28:43,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 425 transitions, 7595 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:43,952 INFO L231 Difference]: Finished difference. Result has 246 places, 404 transitions, 6761 flow [2024-06-14 12:28:43,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6761, PETRI_PLACES=246, PETRI_TRANSITIONS=404} [2024-06-14 12:28:43,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 12:28:43,953 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 404 transitions, 6761 flow [2024-06-14 12:28:43,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:43,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:43,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:28:43,953 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:43,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1239597764, now seen corresponding path program 1 times [2024-06-14 12:28:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:43,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15570069] [2024-06-14 12:28:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:44,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:44,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15570069] [2024-06-14 12:28:44,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15570069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:44,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:44,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073397978] [2024-06-14 12:28:44,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:44,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:44,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:44,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:44,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 404 transitions, 6761 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:44,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:44,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:44,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:46,291 INFO L124 PetriNetUnfolderBase]: 3763/5684 cut-off events. [2024-06-14 12:28:46,291 INFO L125 PetriNetUnfolderBase]: For 422537/422545 co-relation queries the response was YES. [2024-06-14 12:28:46,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49749 conditions, 5684 events. 3763/5684 cut-off events. For 422537/422545 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 30025 event pairs, 1288 based on Foata normal form. 11/5695 useless extension candidates. Maximal degree in co-relation 49632. Up to 5555 conditions per place. [2024-06-14 12:28:46,392 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 390 selfloop transitions, 44 changer transitions 0/437 dead transitions. [2024-06-14 12:28:46,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 437 transitions, 7946 flow [2024-06-14 12:28:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:28:46,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:28:46,398 INFO L175 Difference]: Start difference. First operand has 246 places, 404 transitions, 6761 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:28:46,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 437 transitions, 7946 flow [2024-06-14 12:28:47,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 437 transitions, 7708 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:47,807 INFO L231 Difference]: Finished difference. Result has 250 places, 415 transitions, 6811 flow [2024-06-14 12:28:47,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6525, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6811, PETRI_PLACES=250, PETRI_TRANSITIONS=415} [2024-06-14 12:28:47,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 12:28:47,808 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 415 transitions, 6811 flow [2024-06-14 12:28:47,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:47,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:47,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:47,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:28:47,808 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:47,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1239597361, now seen corresponding path program 4 times [2024-06-14 12:28:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:47,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600073646] [2024-06-14 12:28:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:47,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:48,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600073646] [2024-06-14 12:28:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600073646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:48,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:48,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272507523] [2024-06-14 12:28:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:48,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:48,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:48,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 415 transitions, 6811 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:48,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:48,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:48,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:50,070 INFO L124 PetriNetUnfolderBase]: 3759/5684 cut-off events. [2024-06-14 12:28:50,070 INFO L125 PetriNetUnfolderBase]: For 431549/431573 co-relation queries the response was YES. [2024-06-14 12:28:50,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50187 conditions, 5684 events. 3759/5684 cut-off events. For 431549/431573 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 30036 event pairs, 1169 based on Foata normal form. 24/5708 useless extension candidates. Maximal degree in co-relation 50067. Up to 5122 conditions per place. [2024-06-14 12:28:50,149 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 296 selfloop transitions, 138 changer transitions 0/437 dead transitions. [2024-06-14 12:28:50,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 437 transitions, 8065 flow [2024-06-14 12:28:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:28:50,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:28:50,169 INFO L175 Difference]: Start difference. First operand has 250 places, 415 transitions, 6811 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:28:50,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 437 transitions, 8065 flow [2024-06-14 12:28:51,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 437 transitions, 7979 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-14 12:28:51,193 INFO L231 Difference]: Finished difference. Result has 258 places, 415 transitions, 7009 flow [2024-06-14 12:28:51,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7009, PETRI_PLACES=258, PETRI_TRANSITIONS=415} [2024-06-14 12:28:51,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 12:28:51,194 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 415 transitions, 7009 flow [2024-06-14 12:28:51,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:51,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:51,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:51,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:28:51,195 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:51,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash 221898186, now seen corresponding path program 4 times [2024-06-14 12:28:51,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:51,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881114257] [2024-06-14 12:28:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:52,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881114257] [2024-06-14 12:28:52,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881114257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:52,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:52,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:52,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845450091] [2024-06-14 12:28:52,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:52,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:52,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:52,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:52,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:52,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 415 transitions, 7009 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:52,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:52,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:53,761 INFO L124 PetriNetUnfolderBase]: 3673/5599 cut-off events. [2024-06-14 12:28:53,762 INFO L125 PetriNetUnfolderBase]: For 451260/451271 co-relation queries the response was YES. [2024-06-14 12:28:53,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50492 conditions, 5599 events. 3673/5599 cut-off events. For 451260/451271 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 30025 event pairs, 1093 based on Foata normal form. 12/5609 useless extension candidates. Maximal degree in co-relation 50369. Up to 4909 conditions per place. [2024-06-14 12:28:53,841 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 263 selfloop transitions, 165 changer transitions 0/448 dead transitions. [2024-06-14 12:28:53,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 448 transitions, 8251 flow [2024-06-14 12:28:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:28:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:28:53,842 INFO L175 Difference]: Start difference. First operand has 258 places, 415 transitions, 7009 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:28:53,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 448 transitions, 8251 flow [2024-06-14 12:28:54,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 448 transitions, 7916 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:28:54,897 INFO L231 Difference]: Finished difference. Result has 260 places, 420 transitions, 7142 flow [2024-06-14 12:28:54,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7142, PETRI_PLACES=260, PETRI_TRANSITIONS=420} [2024-06-14 12:28:54,898 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-14 12:28:54,898 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 420 transitions, 7142 flow [2024-06-14 12:28:54,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:54,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:54,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:54,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:28:54,899 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:54,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash -861056511, now seen corresponding path program 5 times [2024-06-14 12:28:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:54,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306988885] [2024-06-14 12:28:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:54,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306988885] [2024-06-14 12:28:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306988885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:55,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:55,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813283378] [2024-06-14 12:28:55,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:55,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:55,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:55,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 420 transitions, 7142 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:55,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:55,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:55,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:57,089 INFO L124 PetriNetUnfolderBase]: 3779/5709 cut-off events. [2024-06-14 12:28:57,089 INFO L125 PetriNetUnfolderBase]: For 462486/462496 co-relation queries the response was YES. [2024-06-14 12:28:57,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51377 conditions, 5709 events. 3779/5709 cut-off events. For 462486/462496 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 30231 event pairs, 1168 based on Foata normal form. 12/5721 useless extension candidates. Maximal degree in co-relation 51253. Up to 5146 conditions per place. [2024-06-14 12:28:57,156 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 280 selfloop transitions, 163 changer transitions 0/446 dead transitions. [2024-06-14 12:28:57,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 446 transitions, 8382 flow [2024-06-14 12:28:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:28:57,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:28:57,158 INFO L175 Difference]: Start difference. First operand has 260 places, 420 transitions, 7142 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:28:57,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 446 transitions, 8382 flow [2024-06-14 12:28:58,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 446 transitions, 8058 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:58,345 INFO L231 Difference]: Finished difference. Result has 262 places, 424 transitions, 7232 flow [2024-06-14 12:28:58,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6822, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7232, PETRI_PLACES=262, PETRI_TRANSITIONS=424} [2024-06-14 12:28:58,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 12:28:58,346 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 424 transitions, 7232 flow [2024-06-14 12:28:58,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:58,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:58,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:28:58,347 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:58,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash -247520660, now seen corresponding path program 3 times [2024-06-14 12:28:58,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:58,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236099381] [2024-06-14 12:28:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:59,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236099381] [2024-06-14 12:28:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236099381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:59,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:59,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192345504] [2024-06-14 12:28:59,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:59,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:59,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 424 transitions, 7232 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:59,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:59,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:59,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:00,486 INFO L124 PetriNetUnfolderBase]: 3709/5650 cut-off events. [2024-06-14 12:29:00,486 INFO L125 PetriNetUnfolderBase]: For 473178/473206 co-relation queries the response was YES. [2024-06-14 12:29:00,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51480 conditions, 5650 events. 3709/5650 cut-off events. For 473178/473206 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30289 event pairs, 1116 based on Foata normal form. 30/5680 useless extension candidates. Maximal degree in co-relation 51355. Up to 5089 conditions per place. [2024-06-14 12:29:00,569 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 131 changer transitions 0/457 dead transitions. [2024-06-14 12:29:00,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 457 transitions, 8743 flow [2024-06-14 12:29:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:29:00,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 12:29:00,571 INFO L175 Difference]: Start difference. First operand has 262 places, 424 transitions, 7232 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:29:00,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 457 transitions, 8743 flow [2024-06-14 12:29:01,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 457 transitions, 8438 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:02,005 INFO L231 Difference]: Finished difference. Result has 264 places, 437 transitions, 7607 flow [2024-06-14 12:29:02,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7607, PETRI_PLACES=264, PETRI_TRANSITIONS=437} [2024-06-14 12:29:02,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 12:29:02,006 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 437 transitions, 7607 flow [2024-06-14 12:29:02,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:02,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:02,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:29:02,006 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:02,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash -241806740, now seen corresponding path program 4 times [2024-06-14 12:29:02,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:02,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312951924] [2024-06-14 12:29:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:02,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:02,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312951924] [2024-06-14 12:29:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312951924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:02,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549664728] [2024-06-14 12:29:02,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:02,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:02,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:02,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 437 transitions, 7607 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:02,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:02,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:02,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:04,089 INFO L124 PetriNetUnfolderBase]: 3703/5645 cut-off events. [2024-06-14 12:29:04,089 INFO L125 PetriNetUnfolderBase]: For 451910/451938 co-relation queries the response was YES. [2024-06-14 12:29:04,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51142 conditions, 5645 events. 3703/5645 cut-off events. For 451910/451938 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30297 event pairs, 1109 based on Foata normal form. 28/5673 useless extension candidates. Maximal degree in co-relation 51016. Up to 5084 conditions per place. [2024-06-14 12:29:04,164 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 306 selfloop transitions, 126 changer transitions 0/453 dead transitions. [2024-06-14 12:29:04,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 453 transitions, 8739 flow [2024-06-14 12:29:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:29:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:29:04,166 INFO L175 Difference]: Start difference. First operand has 264 places, 437 transitions, 7607 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:29:04,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 453 transitions, 8739 flow [2024-06-14 12:29:05,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 453 transitions, 8568 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:05,500 INFO L231 Difference]: Finished difference. Result has 267 places, 437 transitions, 7715 flow [2024-06-14 12:29:05,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7715, PETRI_PLACES=267, PETRI_TRANSITIONS=437} [2024-06-14 12:29:05,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 12:29:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 437 transitions, 7715 flow [2024-06-14 12:29:05,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:29:05,502 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:05,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:05,502 INFO L85 PathProgramCache]: Analyzing trace with hash 257304770, now seen corresponding path program 2 times [2024-06-14 12:29:05,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98911265] [2024-06-14 12:29:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:06,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:06,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98911265] [2024-06-14 12:29:06,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98911265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:06,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:06,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:29:06,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185496697] [2024-06-14 12:29:06,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:06,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:29:06,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:29:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:29:07,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:07,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 437 transitions, 7715 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:07,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:07,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:07,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:08,364 INFO L124 PetriNetUnfolderBase]: 3857/5893 cut-off events. [2024-06-14 12:29:08,364 INFO L125 PetriNetUnfolderBase]: For 466591/466593 co-relation queries the response was YES. [2024-06-14 12:29:08,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52658 conditions, 5893 events. 3857/5893 cut-off events. For 466591/466593 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 31971 event pairs, 1457 based on Foata normal form. 12/5905 useless extension candidates. Maximal degree in co-relation 52532. Up to 4987 conditions per place. [2024-06-14 12:29:08,435 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 372 selfloop transitions, 99 changer transitions 0/492 dead transitions. [2024-06-14 12:29:08,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 492 transitions, 9216 flow [2024-06-14 12:29:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:29:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:29:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:29:08,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-14 12:29:08,436 INFO L175 Difference]: Start difference. First operand has 267 places, 437 transitions, 7715 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:29:08,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 492 transitions, 9216 flow [2024-06-14 12:29:10,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 492 transitions, 9065 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:10,370 INFO L231 Difference]: Finished difference. Result has 275 places, 452 transitions, 8108 flow [2024-06-14 12:29:10,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8108, PETRI_PLACES=275, PETRI_TRANSITIONS=452} [2024-06-14 12:29:10,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 12:29:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 452 transitions, 8108 flow [2024-06-14 12:29:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:10,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:10,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:10,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:29:10,373 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:10,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash -241810367, now seen corresponding path program 6 times [2024-06-14 12:29:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920213647] [2024-06-14 12:29:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:11,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:11,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920213647] [2024-06-14 12:29:11,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920213647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:11,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:11,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:11,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210486207] [2024-06-14 12:29:11,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:11,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:11,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:11,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:11,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 452 transitions, 8108 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:11,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:11,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:11,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:12,623 INFO L124 PetriNetUnfolderBase]: 3999/6048 cut-off events. [2024-06-14 12:29:12,623 INFO L125 PetriNetUnfolderBase]: For 463660/463680 co-relation queries the response was YES. [2024-06-14 12:29:12,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54281 conditions, 6048 events. 3999/6048 cut-off events. For 463660/463680 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32399 event pairs, 1197 based on Foata normal form. 20/6068 useless extension candidates. Maximal degree in co-relation 54152. Up to 5442 conditions per place. [2024-06-14 12:29:12,856 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 316 selfloop transitions, 163 changer transitions 0/482 dead transitions. [2024-06-14 12:29:12,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 482 transitions, 9639 flow [2024-06-14 12:29:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:29:12,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:29:12,867 INFO L175 Difference]: Start difference. First operand has 275 places, 452 transitions, 8108 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:29:12,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 482 transitions, 9639 flow [2024-06-14 12:29:14,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 482 transitions, 9492 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:14,147 INFO L231 Difference]: Finished difference. Result has 279 places, 464 transitions, 8582 flow [2024-06-14 12:29:14,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7961, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8582, PETRI_PLACES=279, PETRI_TRANSITIONS=464} [2024-06-14 12:29:14,147 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 12:29:14,148 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 464 transitions, 8582 flow [2024-06-14 12:29:14,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:14,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:14,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:29:14,148 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:14,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1425117508, now seen corresponding path program 5 times [2024-06-14 12:29:14,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576226573] [2024-06-14 12:29:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576226573] [2024-06-14 12:29:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576226573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:15,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:15,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140847513] [2024-06-14 12:29:15,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:15,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:15,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 464 transitions, 8582 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:15,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:15,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:15,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:16,777 INFO L124 PetriNetUnfolderBase]: 3913/5967 cut-off events. [2024-06-14 12:29:16,777 INFO L125 PetriNetUnfolderBase]: For 482723/482743 co-relation queries the response was YES. [2024-06-14 12:29:16,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54430 conditions, 5967 events. 3913/5967 cut-off events. For 482723/482743 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32380 event pairs, 1133 based on Foata normal form. 20/5987 useless extension candidates. Maximal degree in co-relation 54299. Up to 5371 conditions per place. [2024-06-14 12:29:16,872 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 137 changer transitions 0/485 dead transitions. [2024-06-14 12:29:16,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 485 transitions, 9839 flow [2024-06-14 12:29:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:29:16,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:29:16,873 INFO L175 Difference]: Start difference. First operand has 279 places, 464 transitions, 8582 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:29:16,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 485 transitions, 9839 flow [2024-06-14 12:29:18,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 485 transitions, 9615 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:18,323 INFO L231 Difference]: Finished difference. Result has 282 places, 468 transitions, 8718 flow [2024-06-14 12:29:18,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8362, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8718, PETRI_PLACES=282, PETRI_TRANSITIONS=468} [2024-06-14 12:29:18,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 12:29:18,324 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 468 transitions, 8718 flow [2024-06-14 12:29:18,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:18,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:18,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:18,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:29:18,325 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:18,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:18,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1425129009, now seen corresponding path program 7 times [2024-06-14 12:29:18,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:18,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183739098] [2024-06-14 12:29:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:18,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:19,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:19,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183739098] [2024-06-14 12:29:19,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183739098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:19,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:19,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438064424] [2024-06-14 12:29:19,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:19,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:19,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:19,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 468 transitions, 8718 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:19,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:19,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:19,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:20,447 INFO L124 PetriNetUnfolderBase]: 4007/6060 cut-off events. [2024-06-14 12:29:20,447 INFO L125 PetriNetUnfolderBase]: For 477671/477691 co-relation queries the response was YES. [2024-06-14 12:29:20,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54766 conditions, 6060 events. 4007/6060 cut-off events. For 477671/477691 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32468 event pairs, 1207 based on Foata normal form. 20/6080 useless extension candidates. Maximal degree in co-relation 54635. Up to 5457 conditions per place. [2024-06-14 12:29:20,541 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 319 selfloop transitions, 164 changer transitions 0/486 dead transitions. [2024-06-14 12:29:20,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 486 transitions, 10070 flow [2024-06-14 12:29:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:29:20,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:29:20,542 INFO L175 Difference]: Start difference. First operand has 282 places, 468 transitions, 8718 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:29:20,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 486 transitions, 10070 flow [2024-06-14 12:29:21,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 486 transitions, 9763 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:21,796 INFO L231 Difference]: Finished difference. Result has 284 places, 468 transitions, 8753 flow [2024-06-14 12:29:21,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8753, PETRI_PLACES=284, PETRI_TRANSITIONS=468} [2024-06-14 12:29:21,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-14 12:29:21,797 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 468 transitions, 8753 flow [2024-06-14 12:29:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:21,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:21,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:21,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:29:21,798 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:21,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash -241798804, now seen corresponding path program 2 times [2024-06-14 12:29:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:21,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637673652] [2024-06-14 12:29:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:21,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:22,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:22,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637673652] [2024-06-14 12:29:22,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637673652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:22,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:22,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:22,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048338787] [2024-06-14 12:29:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:22,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:22,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:22,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:22,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 468 transitions, 8753 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:22,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:22,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:22,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:24,382 INFO L124 PetriNetUnfolderBase]: 4038/6098 cut-off events. [2024-06-14 12:29:24,383 INFO L125 PetriNetUnfolderBase]: For 499068/499074 co-relation queries the response was YES. [2024-06-14 12:29:24,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55647 conditions, 6098 events. 4038/6098 cut-off events. For 499068/499074 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 32647 event pairs, 1361 based on Foata normal form. 9/6107 useless extension candidates. Maximal degree in co-relation 55515. Up to 5952 conditions per place. [2024-06-14 12:29:24,470 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 441 selfloop transitions, 52 changer transitions 0/496 dead transitions. [2024-06-14 12:29:24,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 496 transitions, 10100 flow [2024-06-14 12:29:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:29:24,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:29:24,472 INFO L175 Difference]: Start difference. First operand has 284 places, 468 transitions, 8753 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:29:24,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 496 transitions, 10100 flow [2024-06-14 12:29:25,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 496 transitions, 9771 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:25,585 INFO L231 Difference]: Finished difference. Result has 285 places, 476 transitions, 8730 flow [2024-06-14 12:29:25,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8426, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8730, PETRI_PLACES=285, PETRI_TRANSITIONS=476} [2024-06-14 12:29:25,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-14 12:29:25,586 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 476 transitions, 8730 flow [2024-06-14 12:29:25,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:25,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:25,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:25,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:29:25,587 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:25,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:25,587 INFO L85 PathProgramCache]: Analyzing trace with hash -893795400, now seen corresponding path program 5 times [2024-06-14 12:29:25,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:25,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486692600] [2024-06-14 12:29:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:25,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:26,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:26,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486692600] [2024-06-14 12:29:26,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486692600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:26,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105736728] [2024-06-14 12:29:26,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:26,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:26,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 476 transitions, 8730 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:26,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:26,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:26,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:27,663 INFO L124 PetriNetUnfolderBase]: 3921/5984 cut-off events. [2024-06-14 12:29:27,664 INFO L125 PetriNetUnfolderBase]: For 499694/499694 co-relation queries the response was YES. [2024-06-14 12:29:27,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54711 conditions, 5984 events. 3921/5984 cut-off events. For 499694/499694 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 32592 event pairs, 1537 based on Foata normal form. 2/5986 useless extension candidates. Maximal degree in co-relation 54579. Up to 5715 conditions per place. [2024-06-14 12:29:27,745 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 437 selfloop transitions, 31 changer transitions 0/492 dead transitions. [2024-06-14 12:29:27,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 492 transitions, 9846 flow [2024-06-14 12:29:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:29:27,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 12:29:27,746 INFO L175 Difference]: Start difference. First operand has 285 places, 476 transitions, 8730 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:29:27,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 492 transitions, 9846 flow [2024-06-14 12:29:28,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 492 transitions, 9694 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 12:29:28,997 INFO L231 Difference]: Finished difference. Result has 289 places, 476 transitions, 8650 flow [2024-06-14 12:29:28,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8650, PETRI_PLACES=289, PETRI_TRANSITIONS=476} [2024-06-14 12:29:28,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 12:29:28,998 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 476 transitions, 8650 flow [2024-06-14 12:29:28,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:28,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:28,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:28,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:29:28,999 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:28,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1563626376, now seen corresponding path program 6 times [2024-06-14 12:29:28,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:28,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009330418] [2024-06-14 12:29:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:29,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:29,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009330418] [2024-06-14 12:29:29,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009330418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:29,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:29,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367727628] [2024-06-14 12:29:29,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:29,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:29,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:29,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:29,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 476 transitions, 8650 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:29,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:29,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:29,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:31,009 INFO L124 PetriNetUnfolderBase]: 3927/5991 cut-off events. [2024-06-14 12:29:31,009 INFO L125 PetriNetUnfolderBase]: For 509616/509616 co-relation queries the response was YES. [2024-06-14 12:29:31,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54779 conditions, 5991 events. 3927/5991 cut-off events. For 509616/509616 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32592 event pairs, 1540 based on Foata normal form. 1/5992 useless extension candidates. Maximal degree in co-relation 54645. Up to 5743 conditions per place. [2024-06-14 12:29:31,093 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 447 selfloop transitions, 20 changer transitions 0/491 dead transitions. [2024-06-14 12:29:31,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 491 transitions, 9709 flow [2024-06-14 12:29:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:29:31,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:29:31,094 INFO L175 Difference]: Start difference. First operand has 289 places, 476 transitions, 8650 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:29:31,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 491 transitions, 9709 flow [2024-06-14 12:29:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 491 transitions, 9344 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:29:32,435 INFO L231 Difference]: Finished difference. Result has 288 places, 479 transitions, 8420 flow [2024-06-14 12:29:32,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8299, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8420, PETRI_PLACES=288, PETRI_TRANSITIONS=479} [2024-06-14 12:29:32,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 12:29:32,436 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 479 transitions, 8420 flow [2024-06-14 12:29:32,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:32,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:32,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:32,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:29:32,437 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:32,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash -189125392, now seen corresponding path program 3 times [2024-06-14 12:29:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:32,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32004408] [2024-06-14 12:29:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:33,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:33,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32004408] [2024-06-14 12:29:33,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32004408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:33,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:33,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:29:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240177685] [2024-06-14 12:29:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:33,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:29:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:33,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:29:33,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:29:33,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:33,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 479 transitions, 8420 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:33,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:33,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:33,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:35,086 INFO L124 PetriNetUnfolderBase]: 3968/6064 cut-off events. [2024-06-14 12:29:35,086 INFO L125 PetriNetUnfolderBase]: For 530936/530938 co-relation queries the response was YES. [2024-06-14 12:29:35,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55049 conditions, 6064 events. 3968/6064 cut-off events. For 530936/530938 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33151 event pairs, 1522 based on Foata normal form. 12/6076 useless extension candidates. Maximal degree in co-relation 54915. Up to 5675 conditions per place. [2024-06-14 12:29:35,174 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 465 selfloop transitions, 19 changer transitions 0/508 dead transitions. [2024-06-14 12:29:35,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 508 transitions, 9518 flow [2024-06-14 12:29:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:29:35,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:29:35,175 INFO L175 Difference]: Start difference. First operand has 288 places, 479 transitions, 8420 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:29:35,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 508 transitions, 9518 flow [2024-06-14 12:29:36,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 508 transitions, 9468 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:36,748 INFO L231 Difference]: Finished difference. Result has 291 places, 480 transitions, 8442 flow [2024-06-14 12:29:36,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8370, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8442, PETRI_PLACES=291, PETRI_TRANSITIONS=480} [2024-06-14 12:29:36,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:29:36,749 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 480 transitions, 8442 flow [2024-06-14 12:29:36,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:36,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:36,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:36,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:29:36,749 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:36,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash -500288800, now seen corresponding path program 4 times [2024-06-14 12:29:36,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:36,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323801000] [2024-06-14 12:29:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:36,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:37,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323801000] [2024-06-14 12:29:37,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323801000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:37,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:37,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:29:37,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085663086] [2024-06-14 12:29:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:37,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:29:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:29:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:29:38,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:38,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 480 transitions, 8442 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:38,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:38,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:38,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:39,485 INFO L124 PetriNetUnfolderBase]: 3988/6101 cut-off events. [2024-06-14 12:29:39,485 INFO L125 PetriNetUnfolderBase]: For 546153/546173 co-relation queries the response was YES. [2024-06-14 12:29:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55077 conditions, 6101 events. 3988/6101 cut-off events. For 546153/546173 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33377 event pairs, 1032 based on Foata normal form. 40/6141 useless extension candidates. Maximal degree in co-relation 54942. Up to 4630 conditions per place. [2024-06-14 12:29:39,576 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 359 selfloop transitions, 128 changer transitions 0/511 dead transitions. [2024-06-14 12:29:39,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 511 transitions, 9556 flow [2024-06-14 12:29:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:29:39,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:29:39,577 INFO L175 Difference]: Start difference. First operand has 291 places, 480 transitions, 8442 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:29:39,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 511 transitions, 9556 flow [2024-06-14 12:29:41,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 511 transitions, 9492 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:41,206 INFO L231 Difference]: Finished difference. Result has 293 places, 481 transitions, 8678 flow [2024-06-14 12:29:41,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8378, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8678, PETRI_PLACES=293, PETRI_TRANSITIONS=481} [2024-06-14 12:29:41,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 12:29:41,207 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 481 transitions, 8678 flow [2024-06-14 12:29:41,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:41,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:41,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:41,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:29:41,208 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:41,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash -500526136, now seen corresponding path program 1 times [2024-06-14 12:29:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:41,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588165058] [2024-06-14 12:29:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:41,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:42,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:42,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588165058] [2024-06-14 12:29:42,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588165058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:42,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:42,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562345218] [2024-06-14 12:29:42,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:42,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:42,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 481 transitions, 8678 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:42,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:42,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:42,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:43,730 INFO L124 PetriNetUnfolderBase]: 4103/6289 cut-off events. [2024-06-14 12:29:43,731 INFO L125 PetriNetUnfolderBase]: For 551959/551967 co-relation queries the response was YES. [2024-06-14 12:29:43,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56593 conditions, 6289 events. 4103/6289 cut-off events. For 551959/551967 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 34602 event pairs, 905 based on Foata normal form. 22/6311 useless extension candidates. Maximal degree in co-relation 56457. Up to 4932 conditions per place. [2024-06-14 12:29:43,818 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 371 selfloop transitions, 128 changer transitions 0/523 dead transitions. [2024-06-14 12:29:43,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 523 transitions, 9916 flow [2024-06-14 12:29:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 12:29:43,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 12:29:43,820 INFO L175 Difference]: Start difference. First operand has 293 places, 481 transitions, 8678 flow. Second operand 8 states and 168 transitions. [2024-06-14 12:29:43,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 523 transitions, 9916 flow [2024-06-14 12:29:45,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 523 transitions, 9626 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:45,137 INFO L231 Difference]: Finished difference. Result has 295 places, 484 transitions, 8730 flow [2024-06-14 12:29:45,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8388, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8730, PETRI_PLACES=295, PETRI_TRANSITIONS=484} [2024-06-14 12:29:45,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 12:29:45,138 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 484 transitions, 8730 flow [2024-06-14 12:29:45,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:45,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:45,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:45,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:29:45,139 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:45,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1709250230, now seen corresponding path program 5 times [2024-06-14 12:29:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:45,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422717272] [2024-06-14 12:29:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:45,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:46,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:46,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422717272] [2024-06-14 12:29:46,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422717272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:46,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:46,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:29:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455948458] [2024-06-14 12:29:46,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:29:46,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:29:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:29:46,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:46,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 484 transitions, 8730 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:46,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:46,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:46,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:47,926 INFO L124 PetriNetUnfolderBase]: 4083/6263 cut-off events. [2024-06-14 12:29:47,926 INFO L125 PetriNetUnfolderBase]: For 519119/519127 co-relation queries the response was YES. [2024-06-14 12:29:47,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55629 conditions, 6263 events. 4083/6263 cut-off events. For 519119/519127 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 34675 event pairs, 1069 based on Foata normal form. 18/6281 useless extension candidates. Maximal degree in co-relation 55492. Up to 5183 conditions per place. [2024-06-14 12:29:48,013 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 377 selfloop transitions, 115 changer transitions 0/516 dead transitions. [2024-06-14 12:29:48,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 516 transitions, 9789 flow [2024-06-14 12:29:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:29:48,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:29:48,015 INFO L175 Difference]: Start difference. First operand has 295 places, 484 transitions, 8730 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:29:48,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 516 transitions, 9789 flow [2024-06-14 12:29:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 516 transitions, 9487 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:49,432 INFO L231 Difference]: Finished difference. Result has 295 places, 483 transitions, 8613 flow [2024-06-14 12:29:49,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8613, PETRI_PLACES=295, PETRI_TRANSITIONS=483} [2024-06-14 12:29:49,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 12:29:49,433 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 483 transitions, 8613 flow [2024-06-14 12:29:49,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-14 12:29:49,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:49,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:29:49,433 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:49,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1190414032, now seen corresponding path program 7 times [2024-06-14 12:29:49,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:49,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411155082] [2024-06-14 12:29:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:49,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411155082] [2024-06-14 12:29:50,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411155082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:50,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:50,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:50,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938207420] [2024-06-14 12:29:50,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:50,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:50,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:50,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:50,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:50,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 483 transitions, 8613 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:50,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:50,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:50,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:51,751 INFO L124 PetriNetUnfolderBase]: 4077/6262 cut-off events. [2024-06-14 12:29:51,752 INFO L125 PetriNetUnfolderBase]: For 493564/493566 co-relation queries the response was YES. [2024-06-14 12:29:51,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54789 conditions, 6262 events. 4077/6262 cut-off events. For 493564/493566 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 34852 event pairs, 1602 based on Foata normal form. 4/6266 useless extension candidates. Maximal degree in co-relation 54652. Up to 5989 conditions per place. [2024-06-14 12:29:51,820 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 30 changer transitions 0/493 dead transitions. [2024-06-14 12:29:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 493 transitions, 9697 flow [2024-06-14 12:29:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:29:51,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:29:51,822 INFO L175 Difference]: Start difference. First operand has 295 places, 483 transitions, 8613 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:29:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 493 transitions, 9697 flow [2024-06-14 12:29:53,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 493 transitions, 9382 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:53,033 INFO L231 Difference]: Finished difference. Result has 295 places, 483 transitions, 8366 flow [2024-06-14 12:29:53,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8298, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8366, PETRI_PLACES=295, PETRI_TRANSITIONS=483} [2024-06-14 12:29:53,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 12:29:53,034 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 483 transitions, 8366 flow [2024-06-14 12:29:53,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:53,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:53,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:53,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:29:53,035 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:53,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash -483529238, now seen corresponding path program 8 times [2024-06-14 12:29:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:53,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036435899] [2024-06-14 12:29:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:53,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:53,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036435899] [2024-06-14 12:29:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036435899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:53,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:53,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443991504] [2024-06-14 12:29:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:53,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:53,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 483 transitions, 8366 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:53,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:53,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:53,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:55,136 INFO L124 PetriNetUnfolderBase]: 4072/6255 cut-off events. [2024-06-14 12:29:55,137 INFO L125 PetriNetUnfolderBase]: For 498722/498724 co-relation queries the response was YES. [2024-06-14 12:29:55,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53930 conditions, 6255 events. 4072/6255 cut-off events. For 498722/498724 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34846 event pairs, 1606 based on Foata normal form. 3/6258 useless extension candidates. Maximal degree in co-relation 53793. Up to 6006 conditions per place. [2024-06-14 12:29:55,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 447 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2024-06-14 12:29:55,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 492 transitions, 9330 flow [2024-06-14 12:29:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:29:55,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 12:29:55,230 INFO L175 Difference]: Start difference. First operand has 295 places, 483 transitions, 8366 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:29:55,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 492 transitions, 9330 flow [2024-06-14 12:29:56,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 492 transitions, 9270 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:56,680 INFO L231 Difference]: Finished difference. Result has 299 places, 483 transitions, 8354 flow [2024-06-14 12:29:56,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8306, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8354, PETRI_PLACES=299, PETRI_TRANSITIONS=483} [2024-06-14 12:29:56,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-14 12:29:56,681 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 483 transitions, 8354 flow [2024-06-14 12:29:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:56,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:56,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:29:56,681 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:56,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -489247126, now seen corresponding path program 6 times [2024-06-14 12:29:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587911208] [2024-06-14 12:29:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:57,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587911208] [2024-06-14 12:29:57,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587911208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:57,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:57,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:57,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312347812] [2024-06-14 12:29:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:57,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:57,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:57,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:57,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 483 transitions, 8354 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:57,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:57,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:57,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:59,032 INFO L124 PetriNetUnfolderBase]: 4067/6248 cut-off events. [2024-06-14 12:29:59,032 INFO L125 PetriNetUnfolderBase]: For 510687/510689 co-relation queries the response was YES. [2024-06-14 12:29:59,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53964 conditions, 6248 events. 4067/6248 cut-off events. For 510687/510689 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34782 event pairs, 1607 based on Foata normal form. 4/6252 useless extension candidates. Maximal degree in co-relation 53826. Up to 5971 conditions per place. [2024-06-14 12:29:59,122 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 36 changer transitions 0/494 dead transitions. [2024-06-14 12:29:59,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 494 transitions, 9335 flow [2024-06-14 12:29:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:29:59,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:29:59,124 INFO L175 Difference]: Start difference. First operand has 299 places, 483 transitions, 8354 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:29:59,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 494 transitions, 9335 flow [2024-06-14 12:30:00,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 494 transitions, 9227 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 12:30:00,343 INFO L231 Difference]: Finished difference. Result has 298 places, 484 transitions, 8338 flow [2024-06-14 12:30:00,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8338, PETRI_PLACES=298, PETRI_TRANSITIONS=484} [2024-06-14 12:30:00,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 12:30:00,343 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 484 transitions, 8338 flow [2024-06-14 12:30:00,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:00,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:00,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:00,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:30:00,344 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:00,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:00,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2131213972, now seen corresponding path program 3 times [2024-06-14 12:30:00,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:00,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408752085] [2024-06-14 12:30:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:00,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:01,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408752085] [2024-06-14 12:30:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408752085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:01,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:01,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:01,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238537034] [2024-06-14 12:30:01,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:01,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:01,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:01,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:01,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:01,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 484 transitions, 8338 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:01,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:01,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:01,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:02,662 INFO L124 PetriNetUnfolderBase]: 4180/6366 cut-off events. [2024-06-14 12:30:02,663 INFO L125 PetriNetUnfolderBase]: For 525636/525636 co-relation queries the response was YES. [2024-06-14 12:30:02,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54914 conditions, 6366 events. 4180/6366 cut-off events. For 525636/525636 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 34990 event pairs, 1671 based on Foata normal form. 3/6369 useless extension candidates. Maximal degree in co-relation 54775. Up to 6285 conditions per place. [2024-06-14 12:30:02,747 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 478 selfloop transitions, 20 changer transitions 0/501 dead transitions. [2024-06-14 12:30:02,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 501 transitions, 9497 flow [2024-06-14 12:30:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 12:30:02,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-14 12:30:02,749 INFO L175 Difference]: Start difference. First operand has 298 places, 484 transitions, 8338 flow. Second operand 8 states and 122 transitions. [2024-06-14 12:30:02,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 501 transitions, 9497 flow [2024-06-14 12:30:04,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 501 transitions, 9408 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:04,083 INFO L231 Difference]: Finished difference. Result has 300 places, 489 transitions, 8433 flow [2024-06-14 12:30:04,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8249, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8433, PETRI_PLACES=300, PETRI_TRANSITIONS=489} [2024-06-14 12:30:04,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-14 12:30:04,083 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 489 transitions, 8433 flow [2024-06-14 12:30:04,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:04,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:04,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:04,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:30:04,084 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:04,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash -489235625, now seen corresponding path program 8 times [2024-06-14 12:30:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:04,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829733543] [2024-06-14 12:30:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:04,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:04,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:04,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829733543] [2024-06-14 12:30:04,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829733543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:04,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:04,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:04,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4136860] [2024-06-14 12:30:04,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:04,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:04,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:04,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:04,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:04,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:04,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 489 transitions, 8433 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:04,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:04,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:04,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:06,312 INFO L124 PetriNetUnfolderBase]: 4224/6428 cut-off events. [2024-06-14 12:30:06,313 INFO L125 PetriNetUnfolderBase]: For 546613/546615 co-relation queries the response was YES. [2024-06-14 12:30:06,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55799 conditions, 6428 events. 4224/6428 cut-off events. For 546613/546615 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 35352 event pairs, 1676 based on Foata normal form. 4/6432 useless extension candidates. Maximal degree in co-relation 55659. Up to 6245 conditions per place. [2024-06-14 12:30:06,408 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 55 changer transitions 0/513 dead transitions. [2024-06-14 12:30:06,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 513 transitions, 9941 flow [2024-06-14 12:30:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:30:06,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:30:06,409 INFO L175 Difference]: Start difference. First operand has 300 places, 489 transitions, 8433 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:30:06,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 513 transitions, 9941 flow [2024-06-14 12:30:07,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 513 transitions, 9804 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:07,897 INFO L231 Difference]: Finished difference. Result has 303 places, 500 transitions, 8608 flow [2024-06-14 12:30:07,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8296, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8608, PETRI_PLACES=303, PETRI_TRANSITIONS=500} [2024-06-14 12:30:07,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-14 12:30:07,897 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 500 transitions, 8608 flow [2024-06-14 12:30:07,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:07,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:07,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:07,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:30:07,898 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:07,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2131659845, now seen corresponding path program 9 times [2024-06-14 12:30:07,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:07,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451993207] [2024-06-14 12:30:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:07,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:08,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:08,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451993207] [2024-06-14 12:30:08,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451993207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:08,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:08,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222928451] [2024-06-14 12:30:08,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:08,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:08,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 500 transitions, 8608 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:08,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:08,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:08,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:10,157 INFO L124 PetriNetUnfolderBase]: 4220/6423 cut-off events. [2024-06-14 12:30:10,157 INFO L125 PetriNetUnfolderBase]: For 557615/557617 co-relation queries the response was YES. [2024-06-14 12:30:10,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55930 conditions, 6423 events. 4220/6423 cut-off events. For 557615/557617 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 35317 event pairs, 1674 based on Foata normal form. 4/6427 useless extension candidates. Maximal degree in co-relation 55789. Up to 6305 conditions per place. [2024-06-14 12:30:10,250 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 472 selfloop transitions, 37 changer transitions 0/512 dead transitions. [2024-06-14 12:30:10,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 512 transitions, 9817 flow [2024-06-14 12:30:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:30:10,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:30:10,252 INFO L175 Difference]: Start difference. First operand has 303 places, 500 transitions, 8608 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:30:10,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 512 transitions, 9817 flow [2024-06-14 12:30:11,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 512 transitions, 9685 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:11,969 INFO L231 Difference]: Finished difference. Result has 307 places, 501 transitions, 8593 flow [2024-06-14 12:30:11,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8593, PETRI_PLACES=307, PETRI_TRANSITIONS=501} [2024-06-14 12:30:11,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-14 12:30:11,970 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 501 transitions, 8593 flow [2024-06-14 12:30:11,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:11,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:11,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:11,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:30:11,971 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:11,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:11,971 INFO L85 PathProgramCache]: Analyzing trace with hash -489235222, now seen corresponding path program 4 times [2024-06-14 12:30:11,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:11,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627616332] [2024-06-14 12:30:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:11,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:12,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:12,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627616332] [2024-06-14 12:30:12,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627616332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:12,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:12,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:12,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35027009] [2024-06-14 12:30:12,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:12,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:12,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:12,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:12,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:12,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:12,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 501 transitions, 8593 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:12,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:12,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:12,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:14,414 INFO L124 PetriNetUnfolderBase]: 4235/6443 cut-off events. [2024-06-14 12:30:14,414 INFO L125 PetriNetUnfolderBase]: For 576914/576914 co-relation queries the response was YES. [2024-06-14 12:30:14,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56276 conditions, 6443 events. 4235/6443 cut-off events. For 576914/576914 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35422 event pairs, 1670 based on Foata normal form. 3/6446 useless extension candidates. Maximal degree in co-relation 56134. Up to 6330 conditions per place. [2024-06-14 12:30:14,517 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 482 selfloop transitions, 36 changer transitions 0/521 dead transitions. [2024-06-14 12:30:14,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 521 transitions, 9939 flow [2024-06-14 12:30:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:30:14,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:30:14,519 INFO L175 Difference]: Start difference. First operand has 307 places, 501 transitions, 8593 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:30:14,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 521 transitions, 9939 flow [2024-06-14 12:30:16,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 521 transitions, 9703 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:16,251 INFO L231 Difference]: Finished difference. Result has 307 places, 506 transitions, 8573 flow [2024-06-14 12:30:16,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8357, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8573, PETRI_PLACES=307, PETRI_TRANSITIONS=506} [2024-06-14 12:30:16,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-14 12:30:16,252 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 506 transitions, 8573 flow [2024-06-14 12:30:16,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:16,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:16,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:16,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:30:16,252 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:16,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2131659442, now seen corresponding path program 5 times [2024-06-14 12:30:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690113955] [2024-06-14 12:30:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:17,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:17,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690113955] [2024-06-14 12:30:17,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690113955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:17,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:17,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805336463] [2024-06-14 12:30:17,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:17,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:17,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:17,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:17,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:17,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:17,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 506 transitions, 8573 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:17,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:17,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:17,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:18,619 INFO L124 PetriNetUnfolderBase]: 4226/6431 cut-off events. [2024-06-14 12:30:18,620 INFO L125 PetriNetUnfolderBase]: For 585686/585686 co-relation queries the response was YES. [2024-06-14 12:30:18,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55909 conditions, 6431 events. 4226/6431 cut-off events. For 585686/585686 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35321 event pairs, 1668 based on Foata normal form. 3/6434 useless extension candidates. Maximal degree in co-relation 55768. Up to 6338 conditions per place. [2024-06-14 12:30:18,712 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 490 selfloop transitions, 27 changer transitions 0/520 dead transitions. [2024-06-14 12:30:18,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 520 transitions, 9651 flow [2024-06-14 12:30:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:30:18,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 12:30:18,713 INFO L175 Difference]: Start difference. First operand has 307 places, 506 transitions, 8573 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:30:18,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 520 transitions, 9651 flow [2024-06-14 12:30:20,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 520 transitions, 9404 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:20,563 INFO L231 Difference]: Finished difference. Result has 309 places, 506 transitions, 8388 flow [2024-06-14 12:30:20,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8326, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8388, PETRI_PLACES=309, PETRI_TRANSITIONS=506} [2024-06-14 12:30:20,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-14 12:30:20,563 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 506 transitions, 8388 flow [2024-06-14 12:30:20,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:20,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:20,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:20,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:30:20,564 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:20,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -489246785, now seen corresponding path program 10 times [2024-06-14 12:30:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:20,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428196104] [2024-06-14 12:30:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:21,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428196104] [2024-06-14 12:30:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428196104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:21,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:21,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:21,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46799763] [2024-06-14 12:30:21,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:21,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:21,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:21,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:21,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:21,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 506 transitions, 8388 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:21,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:21,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:21,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:22,832 INFO L124 PetriNetUnfolderBase]: 4220/6424 cut-off events. [2024-06-14 12:30:22,833 INFO L125 PetriNetUnfolderBase]: For 592519/592521 co-relation queries the response was YES. [2024-06-14 12:30:22,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55714 conditions, 6424 events. 4220/6424 cut-off events. For 592519/592521 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35352 event pairs, 1672 based on Foata normal form. 4/6428 useless extension candidates. Maximal degree in co-relation 55572. Up to 6247 conditions per place. [2024-06-14 12:30:22,937 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 454 selfloop transitions, 60 changer transitions 0/517 dead transitions. [2024-06-14 12:30:22,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 517 transitions, 9580 flow [2024-06-14 12:30:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:30:22,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:30:22,938 INFO L175 Difference]: Start difference. First operand has 309 places, 506 transitions, 8388 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:30:22,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 517 transitions, 9580 flow [2024-06-14 12:30:25,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 517 transitions, 9450 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:25,385 INFO L231 Difference]: Finished difference. Result has 310 places, 506 transitions, 8385 flow [2024-06-14 12:30:25,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8258, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8385, PETRI_PLACES=310, PETRI_TRANSITIONS=506} [2024-06-14 12:30:25,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 12:30:25,386 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 506 transitions, 8385 flow [2024-06-14 12:30:25,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:25,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:25,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:25,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:30:25,387 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:25,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1032105623, now seen corresponding path program 1 times [2024-06-14 12:30:25,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:25,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23651988] [2024-06-14 12:30:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:25,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:26,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:26,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23651988] [2024-06-14 12:30:26,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23651988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:26,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:26,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:26,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435623772] [2024-06-14 12:30:26,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:26,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:26,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:26,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 506 transitions, 8385 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:26,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:26,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:26,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:27,821 INFO L124 PetriNetUnfolderBase]: 4230/6437 cut-off events. [2024-06-14 12:30:27,821 INFO L125 PetriNetUnfolderBase]: For 608470/608470 co-relation queries the response was YES. [2024-06-14 12:30:27,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56074 conditions, 6437 events. 4230/6437 cut-off events. For 608470/608470 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35432 event pairs, 1669 based on Foata normal form. 2/6439 useless extension candidates. Maximal degree in co-relation 55931. Up to 6331 conditions per place. [2024-06-14 12:30:27,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 504 selfloop transitions, 20 changer transitions 0/527 dead transitions. [2024-06-14 12:30:27,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 527 transitions, 9543 flow [2024-06-14 12:30:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:30:27,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:30:27,918 INFO L175 Difference]: Start difference. First operand has 310 places, 506 transitions, 8385 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:30:27,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 527 transitions, 9543 flow [2024-06-14 12:30:29,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 527 transitions, 9276 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:29,560 INFO L231 Difference]: Finished difference. Result has 311 places, 509 transitions, 8214 flow [2024-06-14 12:30:29,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8118, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8214, PETRI_PLACES=311, PETRI_TRANSITIONS=509} [2024-06-14 12:30:29,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 12:30:29,560 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 509 transitions, 8214 flow [2024-06-14 12:30:29,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:29,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:29,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:29,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:30:29,561 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:29,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash -882359469, now seen corresponding path program 2 times [2024-06-14 12:30:29,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:29,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740397152] [2024-06-14 12:30:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:29,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:30,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740397152] [2024-06-14 12:30:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740397152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741751190] [2024-06-14 12:30:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:30,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:30,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 509 transitions, 8214 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:30,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:30,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:30,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:31,826 INFO L124 PetriNetUnfolderBase]: 4256/6473 cut-off events. [2024-06-14 12:30:31,826 INFO L125 PetriNetUnfolderBase]: For 626308/626308 co-relation queries the response was YES. [2024-06-14 12:30:31,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56881 conditions, 6473 events. 4256/6473 cut-off events. For 626308/626308 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35601 event pairs, 1670 based on Foata normal form. 2/6475 useless extension candidates. Maximal degree in co-relation 56737. Up to 6302 conditions per place. [2024-06-14 12:30:31,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 488 selfloop transitions, 46 changer transitions 0/537 dead transitions. [2024-06-14 12:30:31,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 537 transitions, 9768 flow [2024-06-14 12:30:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:30:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:30:31,928 INFO L175 Difference]: Start difference. First operand has 311 places, 509 transitions, 8214 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:30:31,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 537 transitions, 9768 flow [2024-06-14 12:30:33,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 537 transitions, 9694 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:33,920 INFO L231 Difference]: Finished difference. Result has 314 places, 518 transitions, 8394 flow [2024-06-14 12:30:33,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8140, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8394, PETRI_PLACES=314, PETRI_TRANSITIONS=518} [2024-06-14 12:30:33,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 12:30:33,921 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 518 transitions, 8394 flow [2024-06-14 12:30:33,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:33,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:33,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:33,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:30:33,921 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:33,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash 960030892, now seen corresponding path program 1 times [2024-06-14 12:30:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:33,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233808106] [2024-06-14 12:30:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:34,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:34,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233808106] [2024-06-14 12:30:34,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233808106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:34,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:34,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:34,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101516833] [2024-06-14 12:30:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:34,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:34,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:34,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:34,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:34,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 518 transitions, 8394 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:34,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:34,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:34,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:36,622 INFO L124 PetriNetUnfolderBase]: 4271/6494 cut-off events. [2024-06-14 12:30:36,622 INFO L125 PetriNetUnfolderBase]: For 648560/648560 co-relation queries the response was YES. [2024-06-14 12:30:36,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57659 conditions, 6494 events. 4271/6494 cut-off events. For 648560/648560 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35741 event pairs, 1671 based on Foata normal form. 3/6497 useless extension candidates. Maximal degree in co-relation 57514. Up to 6361 conditions per place. [2024-06-14 12:30:36,714 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 505 selfloop transitions, 35 changer transitions 0/543 dead transitions. [2024-06-14 12:30:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 543 transitions, 9772 flow [2024-06-14 12:30:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:30:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:30:36,716 INFO L175 Difference]: Start difference. First operand has 314 places, 518 transitions, 8394 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:30:36,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 543 transitions, 9772 flow [2024-06-14 12:30:38,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 543 transitions, 9688 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:38,666 INFO L231 Difference]: Finished difference. Result has 319 places, 524 transitions, 8488 flow [2024-06-14 12:30:38,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8310, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8488, PETRI_PLACES=319, PETRI_TRANSITIONS=524} [2024-06-14 12:30:38,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-14 12:30:38,667 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 524 transitions, 8488 flow [2024-06-14 12:30:38,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:38,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:38,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:38,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:30:38,668 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:38,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash -882353889, now seen corresponding path program 3 times [2024-06-14 12:30:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:38,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387819375] [2024-06-14 12:30:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:39,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:39,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387819375] [2024-06-14 12:30:39,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387819375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:39,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948458948] [2024-06-14 12:30:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:39,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:39,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:39,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:39,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:39,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 524 transitions, 8488 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:39,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:39,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:39,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:41,738 INFO L124 PetriNetUnfolderBase]: 4265/6486 cut-off events. [2024-06-14 12:30:41,738 INFO L125 PetriNetUnfolderBase]: For 659620/659620 co-relation queries the response was YES. [2024-06-14 12:30:41,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58026 conditions, 6486 events. 4265/6486 cut-off events. For 659620/659620 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35676 event pairs, 1668 based on Foata normal form. 2/6488 useless extension candidates. Maximal degree in co-relation 57879. Up to 6318 conditions per place. [2024-06-14 12:30:41,854 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 492 selfloop transitions, 47 changer transitions 0/542 dead transitions. [2024-06-14 12:30:41,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 542 transitions, 9768 flow [2024-06-14 12:30:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:30:41,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:30:41,855 INFO L175 Difference]: Start difference. First operand has 319 places, 524 transitions, 8488 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:30:41,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 542 transitions, 9768 flow [2024-06-14 12:30:43,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 542 transitions, 9677 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:43,568 INFO L231 Difference]: Finished difference. Result has 323 places, 524 transitions, 8497 flow [2024-06-14 12:30:43,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8397, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8497, PETRI_PLACES=323, PETRI_TRANSITIONS=524} [2024-06-14 12:30:43,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-14 12:30:43,569 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 524 transitions, 8497 flow [2024-06-14 12:30:43,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:43,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:43,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:43,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:30:43,570 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:43,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:43,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1476203320, now seen corresponding path program 2 times [2024-06-14 12:30:43,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:43,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088206168] [2024-06-14 12:30:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:43,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:44,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088206168] [2024-06-14 12:30:44,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088206168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:44,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:44,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:44,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981687169] [2024-06-14 12:30:44,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:44,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:44,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:44,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:44,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:44,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 524 transitions, 8497 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:44,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:44,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:44,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:45,949 INFO L124 PetriNetUnfolderBase]: 4280/6508 cut-off events. [2024-06-14 12:30:45,949 INFO L125 PetriNetUnfolderBase]: For 679629/679631 co-relation queries the response was YES. [2024-06-14 12:30:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58416 conditions, 6508 events. 4280/6508 cut-off events. For 679629/679631 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35834 event pairs, 1669 based on Foata normal form. 5/6513 useless extension candidates. Maximal degree in co-relation 58267. Up to 6367 conditions per place. [2024-06-14 12:30:46,059 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 503 selfloop transitions, 38 changer transitions 0/544 dead transitions. [2024-06-14 12:30:46,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 544 transitions, 9827 flow [2024-06-14 12:30:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:30:46,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:30:46,061 INFO L175 Difference]: Start difference. First operand has 323 places, 524 transitions, 8497 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:30:46,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 544 transitions, 9827 flow [2024-06-14 12:30:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 544 transitions, 9725 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:47,428 INFO L231 Difference]: Finished difference. Result has 324 places, 527 transitions, 8527 flow [2024-06-14 12:30:47,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8395, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8527, PETRI_PLACES=324, PETRI_TRANSITIONS=527} [2024-06-14 12:30:47,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-14 12:30:47,429 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 527 transitions, 8527 flow [2024-06-14 12:30:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:47,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:47,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:47,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:30:47,431 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:47,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:47,431 INFO L85 PathProgramCache]: Analyzing trace with hash -483515567, now seen corresponding path program 4 times [2024-06-14 12:30:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:47,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144520936] [2024-06-14 12:30:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:47,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144520936] [2024-06-14 12:30:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144520936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872226457] [2024-06-14 12:30:48,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:48,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:48,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 527 transitions, 8527 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:48,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:48,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:48,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:49,835 INFO L124 PetriNetUnfolderBase]: 4306/6545 cut-off events. [2024-06-14 12:30:49,835 INFO L125 PetriNetUnfolderBase]: For 700368/700370 co-relation queries the response was YES. [2024-06-14 12:30:49,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59068 conditions, 6545 events. 4306/6545 cut-off events. For 700368/700370 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36062 event pairs, 1680 based on Foata normal form. 2/6547 useless extension candidates. Maximal degree in co-relation 58918. Up to 6364 conditions per place. [2024-06-14 12:30:49,950 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 494 selfloop transitions, 52 changer transitions 0/549 dead transitions. [2024-06-14 12:30:49,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 549 transitions, 10065 flow [2024-06-14 12:30:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:30:49,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:30:49,951 INFO L175 Difference]: Start difference. First operand has 324 places, 527 transitions, 8527 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:30:49,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 549 transitions, 10065 flow [2024-06-14 12:30:51,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 549 transitions, 9945 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:51,601 INFO L231 Difference]: Finished difference. Result has 326 places, 533 transitions, 8625 flow [2024-06-14 12:30:51,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8407, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8625, PETRI_PLACES=326, PETRI_TRANSITIONS=533} [2024-06-14 12:30:51,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 12:30:51,602 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 533 transitions, 8625 flow [2024-06-14 12:30:51,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:51,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:51,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:51,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:30:51,603 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:51,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash -483521147, now seen corresponding path program 5 times [2024-06-14 12:30:51,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:51,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614860608] [2024-06-14 12:30:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:51,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:52,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614860608] [2024-06-14 12:30:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614860608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:52,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:52,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758653229] [2024-06-14 12:30:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:52,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:52,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:52,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:52,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 533 transitions, 8625 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:52,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:52,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:52,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:54,151 INFO L124 PetriNetUnfolderBase]: 4300/6537 cut-off events. [2024-06-14 12:30:54,152 INFO L125 PetriNetUnfolderBase]: For 711738/711740 co-relation queries the response was YES. [2024-06-14 12:30:54,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59036 conditions, 6537 events. 4300/6537 cut-off events. For 711738/711740 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36006 event pairs, 1680 based on Foata normal form. 2/6539 useless extension candidates. Maximal degree in co-relation 58885. Up to 6359 conditions per place. [2024-06-14 12:30:54,287 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 491 selfloop transitions, 53 changer transitions 0/547 dead transitions. [2024-06-14 12:30:54,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 547 transitions, 9903 flow [2024-06-14 12:30:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:30:54,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:30:54,289 INFO L175 Difference]: Start difference. First operand has 326 places, 533 transitions, 8625 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:30:54,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 547 transitions, 9903 flow [2024-06-14 12:30:56,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 547 transitions, 9717 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:56,246 INFO L231 Difference]: Finished difference. Result has 329 places, 533 transitions, 8551 flow [2024-06-14 12:30:56,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8439, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8551, PETRI_PLACES=329, PETRI_TRANSITIONS=533} [2024-06-14 12:30:56,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 12:30:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 533 transitions, 8551 flow [2024-06-14 12:30:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:56,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:56,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:30:56,248 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2131475147, now seen corresponding path program 6 times [2024-06-14 12:30:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745271471] [2024-06-14 12:30:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745271471] [2024-06-14 12:30:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745271471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:56,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:56,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870593624] [2024-06-14 12:30:56,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:57,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:30:57,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 533 transitions, 8551 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:57,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:57,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:30:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:58,763 INFO L124 PetriNetUnfolderBase]: 4294/6529 cut-off events. [2024-06-14 12:30:58,763 INFO L125 PetriNetUnfolderBase]: For 723062/723064 co-relation queries the response was YES. [2024-06-14 12:30:58,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58952 conditions, 6529 events. 4294/6529 cut-off events. For 723062/723064 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35939 event pairs, 1677 based on Foata normal form. 2/6531 useless extension candidates. Maximal degree in co-relation 58800. Up to 6354 conditions per place. [2024-06-14 12:30:58,850 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 488 selfloop transitions, 55 changer transitions 0/546 dead transitions. [2024-06-14 12:30:58,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 546 transitions, 9679 flow [2024-06-14 12:30:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:30:58,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:30:58,852 INFO L175 Difference]: Start difference. First operand has 329 places, 533 transitions, 8551 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:30:58,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 546 transitions, 9679 flow [2024-06-14 12:31:01,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 546 transitions, 9545 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:01,072 INFO L231 Difference]: Finished difference. Result has 331 places, 533 transitions, 8533 flow [2024-06-14 12:31:01,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8417, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8533, PETRI_PLACES=331, PETRI_TRANSITIONS=533} [2024-06-14 12:31:01,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-14 12:31:01,073 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 533 transitions, 8533 flow [2024-06-14 12:31:01,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:01,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:01,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:01,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:31:01,074 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:01,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2131474930, now seen corresponding path program 3 times [2024-06-14 12:31:01,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:01,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827334787] [2024-06-14 12:31:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:01,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:01,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:01,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827334787] [2024-06-14 12:31:01,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827334787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:01,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:01,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:01,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017338213] [2024-06-14 12:31:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:01,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:01,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:01,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 533 transitions, 8533 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:01,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:01,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:01,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:03,571 INFO L124 PetriNetUnfolderBase]: 4309/6549 cut-off events. [2024-06-14 12:31:03,572 INFO L125 PetriNetUnfolderBase]: For 743318/743320 co-relation queries the response was YES. [2024-06-14 12:31:03,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59305 conditions, 6549 events. 4309/6549 cut-off events. For 743318/743320 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 36094 event pairs, 1668 based on Foata normal form. 5/6554 useless extension candidates. Maximal degree in co-relation 59152. Up to 6401 conditions per place. [2024-06-14 12:31:03,690 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 508 selfloop transitions, 42 changer transitions 0/553 dead transitions. [2024-06-14 12:31:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 553 transitions, 9887 flow [2024-06-14 12:31:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:31:03,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:31:03,692 INFO L175 Difference]: Start difference. First operand has 331 places, 533 transitions, 8533 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:31:03,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 553 transitions, 9887 flow [2024-06-14 12:31:05,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 553 transitions, 9753 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:31:05,841 INFO L231 Difference]: Finished difference. Result has 331 places, 536 transitions, 8537 flow [2024-06-14 12:31:05,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8399, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8537, PETRI_PLACES=331, PETRI_TRANSITIONS=536} [2024-06-14 12:31:05,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-14 12:31:05,842 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 536 transitions, 8537 flow [2024-06-14 12:31:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:05,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:05,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:05,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:31:05,842 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:05,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:05,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2131208020, now seen corresponding path program 4 times [2024-06-14 12:31:05,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:05,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742276515] [2024-06-14 12:31:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:05,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:06,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:06,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742276515] [2024-06-14 12:31:06,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742276515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:06,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357280431] [2024-06-14 12:31:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:06,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:06,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:06,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 536 transitions, 8537 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:06,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:06,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:06,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:08,312 INFO L124 PetriNetUnfolderBase]: 4300/6537 cut-off events. [2024-06-14 12:31:08,313 INFO L125 PetriNetUnfolderBase]: For 752579/752581 co-relation queries the response was YES. [2024-06-14 12:31:08,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59202 conditions, 6537 events. 4300/6537 cut-off events. For 752579/752581 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 36039 event pairs, 1668 based on Foata normal form. 5/6542 useless extension candidates. Maximal degree in co-relation 59048. Up to 6394 conditions per place. [2024-06-14 12:31:08,421 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 503 selfloop transitions, 44 changer transitions 0/550 dead transitions. [2024-06-14 12:31:08,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 550 transitions, 9677 flow [2024-06-14 12:31:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:31:08,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:31:08,423 INFO L175 Difference]: Start difference. First operand has 331 places, 536 transitions, 8537 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:31:08,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 550 transitions, 9677 flow [2024-06-14 12:31:10,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 550 transitions, 9527 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:10,345 INFO L231 Difference]: Finished difference. Result has 333 places, 536 transitions, 8482 flow [2024-06-14 12:31:10,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8387, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8482, PETRI_PLACES=333, PETRI_TRANSITIONS=536} [2024-06-14 12:31:10,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 12:31:10,346 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 536 transitions, 8482 flow [2024-06-14 12:31:10,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:10,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:10,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:10,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:31:10,347 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:10,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash -910161318, now seen corresponding path program 1 times [2024-06-14 12:31:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:10,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233725624] [2024-06-14 12:31:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:11,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:11,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233725624] [2024-06-14 12:31:11,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233725624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:11,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:11,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691609148] [2024-06-14 12:31:11,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:11,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:11,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:11,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:11,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:11,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 536 transitions, 8482 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:11,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:11,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:11,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:12,764 INFO L124 PetriNetUnfolderBase]: 4262/6522 cut-off events. [2024-06-14 12:31:12,764 INFO L125 PetriNetUnfolderBase]: For 781219/781238 co-relation queries the response was YES. [2024-06-14 12:31:12,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59524 conditions, 6522 events. 4262/6522 cut-off events. For 781219/781238 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36356 event pairs, 914 based on Foata normal form. 20/6538 useless extension candidates. Maximal degree in co-relation 59369. Up to 5542 conditions per place. [2024-06-14 12:31:12,872 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 384 selfloop transitions, 164 changer transitions 0/581 dead transitions. [2024-06-14 12:31:12,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 581 transitions, 10193 flow [2024-06-14 12:31:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:31:12,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:31:12,873 INFO L175 Difference]: Start difference. First operand has 333 places, 536 transitions, 8482 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:31:12,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 581 transitions, 10193 flow [2024-06-14 12:31:15,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 581 transitions, 10093 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:15,013 INFO L231 Difference]: Finished difference. Result has 337 places, 546 transitions, 8921 flow [2024-06-14 12:31:15,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8921, PETRI_PLACES=337, PETRI_TRANSITIONS=546} [2024-06-14 12:31:15,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-14 12:31:15,014 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 546 transitions, 8921 flow [2024-06-14 12:31:15,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:15,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:15,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:15,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:31:15,015 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:15,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2039418806, now seen corresponding path program 2 times [2024-06-14 12:31:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:15,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706951569] [2024-06-14 12:31:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:15,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:15,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:15,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706951569] [2024-06-14 12:31:15,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706951569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:15,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:15,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:15,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898649544] [2024-06-14 12:31:15,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:15,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:15,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:15,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:15,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:15,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 546 transitions, 8921 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-14 12:31:15,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:15,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:15,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:17,709 INFO L124 PetriNetUnfolderBase]: 4353/6665 cut-off events. [2024-06-14 12:31:17,709 INFO L125 PetriNetUnfolderBase]: For 820300/820317 co-relation queries the response was YES. [2024-06-14 12:31:17,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62206 conditions, 6665 events. 4353/6665 cut-off events. For 820300/820317 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37489 event pairs, 1102 based on Foata normal form. 20/6685 useless extension candidates. Maximal degree in co-relation 62048. Up to 5753 conditions per place. [2024-06-14 12:31:17,849 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 390 selfloop transitions, 169 changer transitions 0/592 dead transitions. [2024-06-14 12:31:17,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 592 transitions, 10739 flow [2024-06-14 12:31:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:31:17,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 12:31:17,851 INFO L175 Difference]: Start difference. First operand has 337 places, 546 transitions, 8921 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:31:17,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 592 transitions, 10739 flow [2024-06-14 12:31:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 592 transitions, 10277 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:20,101 INFO L231 Difference]: Finished difference. Result has 342 places, 558 transitions, 9097 flow [2024-06-14 12:31:20,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8587, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9097, PETRI_PLACES=342, PETRI_TRANSITIONS=558} [2024-06-14 12:31:20,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 12:31:20,102 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 558 transitions, 9097 flow [2024-06-14 12:31:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-14 12:31:20,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:20,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:20,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:31:20,102 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:20,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 311006160, now seen corresponding path program 3 times [2024-06-14 12:31:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:20,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263348300] [2024-06-14 12:31:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:20,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:20,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263348300] [2024-06-14 12:31:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263348300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:20,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005149577] [2024-06-14 12:31:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:20,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:20,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 558 transitions, 9097 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-14 12:31:20,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:20,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:20,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:22,771 INFO L124 PetriNetUnfolderBase]: 4343/6651 cut-off events. [2024-06-14 12:31:22,772 INFO L125 PetriNetUnfolderBase]: For 823262/823281 co-relation queries the response was YES. [2024-06-14 12:31:22,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61873 conditions, 6651 events. 4343/6651 cut-off events. For 823262/823281 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37381 event pairs, 1099 based on Foata normal form. 22/6673 useless extension candidates. Maximal degree in co-relation 61713. Up to 5814 conditions per place. [2024-06-14 12:31:22,870 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 389 selfloop transitions, 165 changer transitions 0/587 dead transitions. [2024-06-14 12:31:22,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 587 transitions, 10477 flow [2024-06-14 12:31:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:31:22,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:31:22,872 INFO L175 Difference]: Start difference. First operand has 342 places, 558 transitions, 9097 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:31:22,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 587 transitions, 10477 flow [2024-06-14 12:31:25,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 587 transitions, 10216 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:25,073 INFO L231 Difference]: Finished difference. Result has 346 places, 559 transitions, 9183 flow [2024-06-14 12:31:25,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9183, PETRI_PLACES=346, PETRI_TRANSITIONS=559} [2024-06-14 12:31:25,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-14 12:31:25,074 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 559 transitions, 9183 flow [2024-06-14 12:31:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 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) [2024-06-14 12:31:25,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:25,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:25,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:31:25,075 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:25,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2054851536, now seen corresponding path program 1 times [2024-06-14 12:31:25,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:25,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604390155] [2024-06-14 12:31:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:25,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:25,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604390155] [2024-06-14 12:31:25,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604390155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:25,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507418342] [2024-06-14 12:31:25,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:25,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:25,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:25,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:25,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:25,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:25,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 559 transitions, 9183 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:25,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:25,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:25,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:27,691 INFO L124 PetriNetUnfolderBase]: 4456/6771 cut-off events. [2024-06-14 12:31:27,691 INFO L125 PetriNetUnfolderBase]: For 836014/836033 co-relation queries the response was YES. [2024-06-14 12:31:27,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63118 conditions, 6771 events. 4456/6771 cut-off events. For 836014/836033 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37649 event pairs, 1156 based on Foata normal form. 20/6791 useless extension candidates. Maximal degree in co-relation 62956. Up to 5838 conditions per place. [2024-06-14 12:31:27,801 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 390 selfloop transitions, 205 changer transitions 0/598 dead transitions. [2024-06-14 12:31:27,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 598 transitions, 10983 flow [2024-06-14 12:31:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:31:27,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:31:27,805 INFO L175 Difference]: Start difference. First operand has 346 places, 559 transitions, 9183 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:31:27,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 598 transitions, 10983 flow [2024-06-14 12:31:30,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 598 transitions, 10656 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:30,611 INFO L231 Difference]: Finished difference. Result has 348 places, 570 transitions, 9475 flow [2024-06-14 12:31:30,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8856, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9475, PETRI_PLACES=348, PETRI_TRANSITIONS=570} [2024-06-14 12:31:30,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 12:31:30,612 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 570 transitions, 9475 flow [2024-06-14 12:31:30,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:30,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:30,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:30,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:31:30,612 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:30,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:30,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1508508696, now seen corresponding path program 1 times [2024-06-14 12:31:30,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:30,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727968419] [2024-06-14 12:31:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:31,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727968419] [2024-06-14 12:31:31,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727968419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:31,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:31,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073505620] [2024-06-14 12:31:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:31,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:31,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:31,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:31,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:31,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:31,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 570 transitions, 9475 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:31,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:31,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:31,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:33,569 INFO L124 PetriNetUnfolderBase]: 4510/6848 cut-off events. [2024-06-14 12:31:33,569 INFO L125 PetriNetUnfolderBase]: For 883232/883240 co-relation queries the response was YES. [2024-06-14 12:31:33,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64800 conditions, 6848 events. 4510/6848 cut-off events. For 883232/883240 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38095 event pairs, 1282 based on Foata normal form. 14/6862 useless extension candidates. Maximal degree in co-relation 64637. Up to 6074 conditions per place. [2024-06-14 12:31:33,682 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 416 selfloop transitions, 205 changer transitions 0/624 dead transitions. [2024-06-14 12:31:33,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 624 transitions, 11427 flow [2024-06-14 12:31:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:31:33,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-14 12:31:33,684 INFO L175 Difference]: Start difference. First operand has 348 places, 570 transitions, 9475 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:31:33,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 624 transitions, 11427 flow [2024-06-14 12:31:36,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 624 transitions, 11276 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:36,076 INFO L231 Difference]: Finished difference. Result has 356 places, 595 transitions, 10207 flow [2024-06-14 12:31:36,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9324, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10207, PETRI_PLACES=356, PETRI_TRANSITIONS=595} [2024-06-14 12:31:36,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-14 12:31:36,077 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 595 transitions, 10207 flow [2024-06-14 12:31:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:36,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:31:36,077 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:36,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1278904242, now seen corresponding path program 1 times [2024-06-14 12:31:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893677802] [2024-06-14 12:31:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893677802] [2024-06-14 12:31:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893677802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:36,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:36,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61283373] [2024-06-14 12:31:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:36,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:36,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:36,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:36,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 595 transitions, 10207 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:36,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:36,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:36,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:38,703 INFO L124 PetriNetUnfolderBase]: 4514/6895 cut-off events. [2024-06-14 12:31:38,703 INFO L125 PetriNetUnfolderBase]: For 906599/906619 co-relation queries the response was YES. [2024-06-14 12:31:38,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67576 conditions, 6895 events. 4514/6895 cut-off events. For 906599/906619 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 38835 event pairs, 1141 based on Foata normal form. 22/6917 useless extension candidates. Maximal degree in co-relation 67409. Up to 6146 conditions per place. [2024-06-14 12:31:38,823 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 531 selfloop transitions, 93 changer transitions 0/660 dead transitions. [2024-06-14 12:31:38,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 660 transitions, 12186 flow [2024-06-14 12:31:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:31:38,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:31:38,825 INFO L175 Difference]: Start difference. First operand has 356 places, 595 transitions, 10207 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:31:38,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 660 transitions, 12186 flow [2024-06-14 12:31:41,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 660 transitions, 12039 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:41,504 INFO L231 Difference]: Finished difference. Result has 364 places, 626 transitions, 10945 flow [2024-06-14 12:31:41,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10062, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10945, PETRI_PLACES=364, PETRI_TRANSITIONS=626} [2024-06-14 12:31:41,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-14 12:31:41,505 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 626 transitions, 10945 flow [2024-06-14 12:31:41,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:41,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:41,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:31:41,505 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:41,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2041401208, now seen corresponding path program 2 times [2024-06-14 12:31:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:41,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389470772] [2024-06-14 12:31:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:42,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:42,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389470772] [2024-06-14 12:31:42,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389470772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:42,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:42,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:42,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349530535] [2024-06-14 12:31:42,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:42,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:42,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:42,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 626 transitions, 10945 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:42,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:42,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:42,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:44,488 INFO L124 PetriNetUnfolderBase]: 4594/7008 cut-off events. [2024-06-14 12:31:44,489 INFO L125 PetriNetUnfolderBase]: For 961689/961709 co-relation queries the response was YES. [2024-06-14 12:31:44,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70598 conditions, 7008 events. 4594/7008 cut-off events. For 961689/961709 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 39640 event pairs, 1168 based on Foata normal form. 22/7030 useless extension candidates. Maximal degree in co-relation 70425. Up to 5904 conditions per place. [2024-06-14 12:31:44,613 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 504 selfloop transitions, 144 changer transitions 0/684 dead transitions. [2024-06-14 12:31:44,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 684 transitions, 13286 flow [2024-06-14 12:31:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:31:44,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 12:31:44,615 INFO L175 Difference]: Start difference. First operand has 364 places, 626 transitions, 10945 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:31:44,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 684 transitions, 13286 flow [2024-06-14 12:31:48,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 684 transitions, 13106 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:48,090 INFO L231 Difference]: Finished difference. Result has 372 places, 647 transitions, 11488 flow [2024-06-14 12:31:48,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10765, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11488, PETRI_PLACES=372, PETRI_TRANSITIONS=647} [2024-06-14 12:31:48,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-14 12:31:48,090 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 647 transitions, 11488 flow [2024-06-14 12:31:48,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:48,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:48,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:48,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:31:48,091 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:48,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2120516594, now seen corresponding path program 1 times [2024-06-14 12:31:48,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:48,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419628] [2024-06-14 12:31:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:48,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:48,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419628] [2024-06-14 12:31:48,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:48,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512220949] [2024-06-14 12:31:48,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:48,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:48,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 647 transitions, 11488 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:48,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:48,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:48,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:50,768 INFO L124 PetriNetUnfolderBase]: 4710/7134 cut-off events. [2024-06-14 12:31:50,769 INFO L125 PetriNetUnfolderBase]: For 990421/990441 co-relation queries the response was YES. [2024-06-14 12:31:50,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73238 conditions, 7134 events. 4710/7134 cut-off events. For 990421/990441 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39913 event pairs, 1288 based on Foata normal form. 20/7154 useless extension candidates. Maximal degree in co-relation 73061. Up to 6511 conditions per place. [2024-06-14 12:31:50,899 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 507 selfloop transitions, 170 changer transitions 0/680 dead transitions. [2024-06-14 12:31:50,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 680 transitions, 13596 flow [2024-06-14 12:31:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:31:50,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:31:50,901 INFO L175 Difference]: Start difference. First operand has 372 places, 647 transitions, 11488 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:31:50,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 680 transitions, 13596 flow [2024-06-14 12:31:53,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 680 transitions, 13474 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-14 12:31:53,987 INFO L231 Difference]: Finished difference. Result has 379 places, 655 transitions, 11878 flow [2024-06-14 12:31:53,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11366, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11878, PETRI_PLACES=379, PETRI_TRANSITIONS=655} [2024-06-14 12:31:53,988 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 12:31:53,988 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 655 transitions, 11878 flow [2024-06-14 12:31:53,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:53,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:53,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:53,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:31:53,989 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:53,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash 271281388, now seen corresponding path program 2 times [2024-06-14 12:31:53,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:53,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030899079] [2024-06-14 12:31:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:53,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:54,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:54,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030899079] [2024-06-14 12:31:54,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030899079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:54,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94043671] [2024-06-14 12:31:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:54,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:54,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:31:54,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 655 transitions, 11878 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:54,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:54,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:31:54,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:56,542 INFO L124 PetriNetUnfolderBase]: 4720/7152 cut-off events. [2024-06-14 12:31:56,543 INFO L125 PetriNetUnfolderBase]: For 1013639/1013659 co-relation queries the response was YES. [2024-06-14 12:31:56,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73912 conditions, 7152 events. 4720/7152 cut-off events. For 1013639/1013659 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40079 event pairs, 1269 based on Foata normal form. 20/7172 useless extension candidates. Maximal degree in co-relation 73732. Up to 6521 conditions per place. [2024-06-14 12:31:56,669 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 503 selfloop transitions, 175 changer transitions 0/681 dead transitions. [2024-06-14 12:31:56,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 681 transitions, 13905 flow [2024-06-14 12:31:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:31:56,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:31:56,670 INFO L175 Difference]: Start difference. First operand has 379 places, 655 transitions, 11878 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:31:56,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 681 transitions, 13905 flow [2024-06-14 12:32:00,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 681 transitions, 13650 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:00,195 INFO L231 Difference]: Finished difference. Result has 383 places, 659 transitions, 12070 flow [2024-06-14 12:32:00,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12070, PETRI_PLACES=383, PETRI_TRANSITIONS=659} [2024-06-14 12:32:00,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-14 12:32:00,196 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 659 transitions, 12070 flow [2024-06-14 12:32:00,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:00,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:00,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:00,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:32:00,196 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:00,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash -227420138, now seen corresponding path program 3 times [2024-06-14 12:32:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:00,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326644606] [2024-06-14 12:32:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:00,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326644606] [2024-06-14 12:32:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326644606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:00,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:00,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090359030] [2024-06-14 12:32:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:00,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:01,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:01,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 659 transitions, 12070 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:01,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:01,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:01,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:02,975 INFO L124 PetriNetUnfolderBase]: 4618/7046 cut-off events. [2024-06-14 12:32:02,975 INFO L125 PetriNetUnfolderBase]: For 1034281/1034301 co-relation queries the response was YES. [2024-06-14 12:32:03,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73296 conditions, 7046 events. 4618/7046 cut-off events. For 1034281/1034301 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 39816 event pairs, 1180 based on Foata normal form. 22/7068 useless extension candidates. Maximal degree in co-relation 73115. Up to 5932 conditions per place. [2024-06-14 12:32:03,098 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 500 selfloop transitions, 152 changer transitions 0/691 dead transitions. [2024-06-14 12:32:03,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 691 transitions, 13954 flow [2024-06-14 12:32:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:32:03,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:32:03,100 INFO L175 Difference]: Start difference. First operand has 383 places, 659 transitions, 12070 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:32:03,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 691 transitions, 13954 flow [2024-06-14 12:32:06,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 691 transitions, 13624 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:06,875 INFO L231 Difference]: Finished difference. Result has 386 places, 659 transitions, 12052 flow [2024-06-14 12:32:06,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11740, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12052, PETRI_PLACES=386, PETRI_TRANSITIONS=659} [2024-06-14 12:32:06,876 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-14 12:32:06,876 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 659 transitions, 12052 flow [2024-06-14 12:32:06,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:06,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:06,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:06,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:32:06,877 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:06,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -227182802, now seen corresponding path program 3 times [2024-06-14 12:32:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:06,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856695639] [2024-06-14 12:32:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:06,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:07,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:07,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856695639] [2024-06-14 12:32:07,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856695639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:07,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:07,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:07,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310606829] [2024-06-14 12:32:07,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:07,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:07,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:07,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:07,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 659 transitions, 12052 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:07,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:07,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:07,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:09,641 INFO L124 PetriNetUnfolderBase]: 4702/7128 cut-off events. [2024-06-14 12:32:09,641 INFO L125 PetriNetUnfolderBase]: For 1035906/1035926 co-relation queries the response was YES. [2024-06-14 12:32:09,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73768 conditions, 7128 events. 4702/7128 cut-off events. For 1035906/1035926 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 39933 event pairs, 1267 based on Foata normal form. 20/7148 useless extension candidates. Maximal degree in co-relation 73586. Up to 6500 conditions per place. [2024-06-14 12:32:09,772 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 498 selfloop transitions, 179 changer transitions 0/680 dead transitions. [2024-06-14 12:32:09,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 680 transitions, 13824 flow [2024-06-14 12:32:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:32:09,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:32:09,774 INFO L175 Difference]: Start difference. First operand has 386 places, 659 transitions, 12052 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:32:09,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 680 transitions, 13824 flow [2024-06-14 12:32:13,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 680 transitions, 13519 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:13,723 INFO L231 Difference]: Finished difference. Result has 389 places, 659 transitions, 12117 flow [2024-06-14 12:32:13,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11747, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12117, PETRI_PLACES=389, PETRI_TRANSITIONS=659} [2024-06-14 12:32:13,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 12:32:13,724 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 659 transitions, 12117 flow [2024-06-14 12:32:13,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:13,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:13,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:13,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:32:13,724 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:13,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1303382738, now seen corresponding path program 4 times [2024-06-14 12:32:13,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:13,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053985481] [2024-06-14 12:32:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:14,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:14,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053985481] [2024-06-14 12:32:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053985481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:14,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:14,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916474086] [2024-06-14 12:32:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:14,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:14,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 659 transitions, 12117 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:14,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:14,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:14,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:16,956 INFO L124 PetriNetUnfolderBase]: 4780/7299 cut-off events. [2024-06-14 12:32:16,957 INFO L125 PetriNetUnfolderBase]: For 1085785/1085793 co-relation queries the response was YES. [2024-06-14 12:32:17,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75233 conditions, 7299 events. 4780/7299 cut-off events. For 1085785/1085793 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 41777 event pairs, 1220 based on Foata normal form. 12/7311 useless extension candidates. Maximal degree in co-relation 75050. Up to 6448 conditions per place. [2024-06-14 12:32:17,091 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 512 selfloop transitions, 165 changer transitions 0/716 dead transitions. [2024-06-14 12:32:17,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 716 transitions, 14029 flow [2024-06-14 12:32:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:32:17,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-14 12:32:17,092 INFO L175 Difference]: Start difference. First operand has 389 places, 659 transitions, 12117 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:32:17,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 716 transitions, 14029 flow [2024-06-14 12:32:21,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 716 transitions, 13704 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:32:21,748 INFO L231 Difference]: Finished difference. Result has 393 places, 682 transitions, 12456 flow [2024-06-14 12:32:21,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11792, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12456, PETRI_PLACES=393, PETRI_TRANSITIONS=682} [2024-06-14 12:32:21,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 12:32:21,749 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 682 transitions, 12456 flow [2024-06-14 12:32:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:21,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:21,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:32:21,749 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2056239704, now seen corresponding path program 5 times [2024-06-14 12:32:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452181951] [2024-06-14 12:32:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:22,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:22,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452181951] [2024-06-14 12:32:22,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452181951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:22,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:22,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247023868] [2024-06-14 12:32:22,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:22,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:23,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:23,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 682 transitions, 12456 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:23,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:23,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:23,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:25,308 INFO L124 PetriNetUnfolderBase]: 4796/7327 cut-off events. [2024-06-14 12:32:25,309 INFO L125 PetriNetUnfolderBase]: For 1109832/1109840 co-relation queries the response was YES. [2024-06-14 12:32:25,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76058 conditions, 7327 events. 4796/7327 cut-off events. For 1109832/1109840 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 41990 event pairs, 1240 based on Foata normal form. 12/7339 useless extension candidates. Maximal degree in co-relation 75873. Up to 6604 conditions per place. [2024-06-14 12:32:25,449 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 522 selfloop transitions, 153 changer transitions 0/714 dead transitions. [2024-06-14 12:32:25,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 714 transitions, 13959 flow [2024-06-14 12:32:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:32:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:32:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-14 12:32:25,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-14 12:32:25,450 INFO L175 Difference]: Start difference. First operand has 393 places, 682 transitions, 12456 flow. Second operand 11 states and 199 transitions. [2024-06-14 12:32:25,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 714 transitions, 13959 flow [2024-06-14 12:32:30,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 714 transitions, 13810 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:30,732 INFO L231 Difference]: Finished difference. Result has 399 places, 685 transitions, 12679 flow [2024-06-14 12:32:30,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12307, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12679, PETRI_PLACES=399, PETRI_TRANSITIONS=685} [2024-06-14 12:32:30,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-14 12:32:30,748 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 685 transitions, 12679 flow [2024-06-14 12:32:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:30,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:30,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:32:30,749 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2056240014, now seen corresponding path program 2 times [2024-06-14 12:32:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:30,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321508208] [2024-06-14 12:32:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:31,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:31,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321508208] [2024-06-14 12:32:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321508208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:31,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:31,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:31,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076061087] [2024-06-14 12:32:31,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:31,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:31,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:31,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:31,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:31,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 685 transitions, 12679 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:31,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:31,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:31,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:34,103 INFO L124 PetriNetUnfolderBase]: 4923/7468 cut-off events. [2024-06-14 12:32:34,103 INFO L125 PetriNetUnfolderBase]: For 1130404/1130412 co-relation queries the response was YES. [2024-06-14 12:32:34,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77686 conditions, 7468 events. 4923/7468 cut-off events. For 1130404/1130412 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42380 event pairs, 1310 based on Foata normal form. 10/7478 useless extension candidates. Maximal degree in co-relation 77499. Up to 6726 conditions per place. [2024-06-14 12:32:34,250 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 516 selfloop transitions, 210 changer transitions 0/729 dead transitions. [2024-06-14 12:32:34,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 729 transitions, 14926 flow [2024-06-14 12:32:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:32:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:32:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-14 12:32:34,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:32:34,252 INFO L175 Difference]: Start difference. First operand has 399 places, 685 transitions, 12679 flow. Second operand 12 states and 210 transitions. [2024-06-14 12:32:34,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 729 transitions, 14926 flow [2024-06-14 12:32:37,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 729 transitions, 14651 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:32:37,983 INFO L231 Difference]: Finished difference. Result has 403 places, 697 transitions, 13000 flow [2024-06-14 12:32:37,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12404, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13000, PETRI_PLACES=403, PETRI_TRANSITIONS=697} [2024-06-14 12:32:37,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-14 12:32:37,984 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 697 transitions, 13000 flow [2024-06-14 12:32:38,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:38,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:38,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:38,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:32:38,013 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:38,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2064582486, now seen corresponding path program 2 times [2024-06-14 12:32:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:38,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33662686] [2024-06-14 12:32:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:38,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:38,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33662686] [2024-06-14 12:32:38,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33662686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:38,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:38,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:38,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543401883] [2024-06-14 12:32:38,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:38,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:38,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:38,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 697 transitions, 13000 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:38,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:38,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:38,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:41,276 INFO L124 PetriNetUnfolderBase]: 5079/7680 cut-off events. [2024-06-14 12:32:41,277 INFO L125 PetriNetUnfolderBase]: For 1225742/1225750 co-relation queries the response was YES. [2024-06-14 12:32:41,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80817 conditions, 7680 events. 5079/7680 cut-off events. For 1225742/1225750 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43574 event pairs, 1352 based on Foata normal form. 14/7694 useless extension candidates. Maximal degree in co-relation 80629. Up to 6746 conditions per place. [2024-06-14 12:32:41,422 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 547 selfloop transitions, 205 changer transitions 0/755 dead transitions. [2024-06-14 12:32:41,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 755 transitions, 15621 flow [2024-06-14 12:32:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:32:41,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 12:32:41,424 INFO L175 Difference]: Start difference. First operand has 403 places, 697 transitions, 13000 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:32:41,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 755 transitions, 15621 flow [2024-06-14 12:32:45,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 755 transitions, 15263 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 12:32:45,855 INFO L231 Difference]: Finished difference. Result has 406 places, 724 transitions, 13705 flow [2024-06-14 12:32:45,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12642, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13705, PETRI_PLACES=406, PETRI_TRANSITIONS=724} [2024-06-14 12:32:45,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 12:32:45,856 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 724 transitions, 13705 flow [2024-06-14 12:32:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:45,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:45,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:32:45,856 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:45,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash 271158070, now seen corresponding path program 6 times [2024-06-14 12:32:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:45,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26649270] [2024-06-14 12:32:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:45,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:46,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26649270] [2024-06-14 12:32:46,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26649270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:46,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:46,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:46,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183356610] [2024-06-14 12:32:46,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:46,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:46,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:46,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:46,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 724 transitions, 13705 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:46,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:46,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:46,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:49,034 INFO L124 PetriNetUnfolderBase]: 4971/7571 cut-off events. [2024-06-14 12:32:49,035 INFO L125 PetriNetUnfolderBase]: For 1233973/1233993 co-relation queries the response was YES. [2024-06-14 12:32:49,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81694 conditions, 7571 events. 4971/7571 cut-off events. For 1233973/1233993 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43382 event pairs, 1256 based on Foata normal form. 22/7593 useless extension candidates. Maximal degree in co-relation 81502. Up to 6906 conditions per place. [2024-06-14 12:32:49,178 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 570 selfloop transitions, 134 changer transitions 0/746 dead transitions. [2024-06-14 12:32:49,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 746 transitions, 15195 flow [2024-06-14 12:32:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:32:49,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:32:49,180 INFO L175 Difference]: Start difference. First operand has 406 places, 724 transitions, 13705 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:32:49,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 746 transitions, 15195 flow [2024-06-14 12:32:53,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 746 transitions, 14974 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:53,394 INFO L231 Difference]: Finished difference. Result has 412 places, 725 transitions, 13772 flow [2024-06-14 12:32:53,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13484, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13772, PETRI_PLACES=412, PETRI_TRANSITIONS=725} [2024-06-14 12:32:53,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 12:32:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 725 transitions, 13772 flow [2024-06-14 12:32:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:53,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:53,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:32:53,395 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:53,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash -227532730, now seen corresponding path program 3 times [2024-06-14 12:32:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:53,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873130687] [2024-06-14 12:32:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873130687] [2024-06-14 12:32:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873130687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:54,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:54,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:32:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131207703] [2024-06-14 12:32:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:32:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:32:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:32:54,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:32:54,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 725 transitions, 13772 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:54,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:54,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:32:54,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:57,000 INFO L124 PetriNetUnfolderBase]: 5079/7683 cut-off events. [2024-06-14 12:32:57,000 INFO L125 PetriNetUnfolderBase]: For 1245285/1245305 co-relation queries the response was YES. [2024-06-14 12:32:57,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82598 conditions, 7683 events. 5079/7683 cut-off events. For 1245285/1245305 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43603 event pairs, 1310 based on Foata normal form. 20/7703 useless extension candidates. Maximal degree in co-relation 82404. Up to 7043 conditions per place. [2024-06-14 12:32:57,148 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 568 selfloop transitions, 180 changer transitions 0/751 dead transitions. [2024-06-14 12:32:57,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 751 transitions, 15770 flow [2024-06-14 12:32:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 12:32:57,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:32:57,150 INFO L175 Difference]: Start difference. First operand has 412 places, 725 transitions, 13772 flow. Second operand 10 states and 172 transitions. [2024-06-14 12:32:57,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 751 transitions, 15770 flow [2024-06-14 12:33:01,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 751 transitions, 15508 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:01,213 INFO L231 Difference]: Finished difference. Result has 415 places, 729 transitions, 13943 flow [2024-06-14 12:33:01,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13510, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13943, PETRI_PLACES=415, PETRI_TRANSITIONS=729} [2024-06-14 12:33:01,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 12:33:01,214 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 729 transitions, 13943 flow [2024-06-14 12:33:01,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:01,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:01,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:01,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:33:01,214 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:01,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash 607105810, now seen corresponding path program 3 times [2024-06-14 12:33:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:01,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626235027] [2024-06-14 12:33:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:01,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626235027] [2024-06-14 12:33:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626235027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:02,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:02,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:02,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289448769] [2024-06-14 12:33:02,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:02,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:02,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:02,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:02,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:02,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 729 transitions, 13943 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:02,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:02,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:02,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:04,367 INFO L124 PetriNetUnfolderBase]: 5109/7725 cut-off events. [2024-06-14 12:33:04,367 INFO L125 PetriNetUnfolderBase]: For 1287383/1287403 co-relation queries the response was YES. [2024-06-14 12:33:04,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83374 conditions, 7725 events. 5109/7725 cut-off events. For 1287383/1287403 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43881 event pairs, 1313 based on Foata normal form. 24/7749 useless extension candidates. Maximal degree in co-relation 83179. Up to 6768 conditions per place. [2024-06-14 12:33:04,519 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 556 selfloop transitions, 205 changer transitions 0/764 dead transitions. [2024-06-14 12:33:04,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 764 transitions, 16272 flow [2024-06-14 12:33:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:33:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:33:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:33:04,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-14 12:33:04,520 INFO L175 Difference]: Start difference. First operand has 415 places, 729 transitions, 13943 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:33:04,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 764 transitions, 16272 flow [2024-06-14 12:33:10,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 764 transitions, 15883 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:10,538 INFO L231 Difference]: Finished difference. Result has 417 places, 736 transitions, 14119 flow [2024-06-14 12:33:10,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13554, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14119, PETRI_PLACES=417, PETRI_TRANSITIONS=736} [2024-06-14 12:33:10,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 12:33:10,539 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 736 transitions, 14119 flow [2024-06-14 12:33:10,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:10,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:10,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:33:10,539 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:10,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash -227542960, now seen corresponding path program 4 times [2024-06-14 12:33:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:10,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729168669] [2024-06-14 12:33:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:11,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729168669] [2024-06-14 12:33:11,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729168669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:11,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:11,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:11,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757274322] [2024-06-14 12:33:11,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:11,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:11,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:11,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:11,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 736 transitions, 14119 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:11,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:11,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:11,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:13,932 INFO L124 PetriNetUnfolderBase]: 5119/7739 cut-off events. [2024-06-14 12:33:13,932 INFO L125 PetriNetUnfolderBase]: For 1297561/1297581 co-relation queries the response was YES. [2024-06-14 12:33:14,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83890 conditions, 7739 events. 5119/7739 cut-off events. For 1297561/1297581 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43979 event pairs, 1315 based on Foata normal form. 20/7759 useless extension candidates. Maximal degree in co-relation 83694. Up to 7074 conditions per place. [2024-06-14 12:33:14,080 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 569 selfloop transitions, 192 changer transitions 0/764 dead transitions. [2024-06-14 12:33:14,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 764 transitions, 16353 flow [2024-06-14 12:33:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:33:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:33:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-14 12:33:14,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:33:14,082 INFO L175 Difference]: Start difference. First operand has 417 places, 736 transitions, 14119 flow. Second operand 11 states and 187 transitions. [2024-06-14 12:33:14,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 764 transitions, 16353 flow [2024-06-14 12:33:20,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 764 transitions, 15892 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:20,534 INFO L231 Difference]: Finished difference. Result has 421 places, 740 transitions, 14120 flow [2024-06-14 12:33:20,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13658, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14120, PETRI_PLACES=421, PETRI_TRANSITIONS=740} [2024-06-14 12:33:20,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 12:33:20,535 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 740 transitions, 14120 flow [2024-06-14 12:33:20,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:20,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:20,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:20,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:33:20,536 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:20,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash -227186770, now seen corresponding path program 5 times [2024-06-14 12:33:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615267821] [2024-06-14 12:33:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:20,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:21,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:21,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615267821] [2024-06-14 12:33:21,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615267821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:21,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:21,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123729417] [2024-06-14 12:33:21,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:21,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:21,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:21,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:21,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 740 transitions, 14120 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:21,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:21,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:21,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:24,269 INFO L124 PetriNetUnfolderBase]: 5115/7734 cut-off events. [2024-06-14 12:33:24,269 INFO L125 PetriNetUnfolderBase]: For 1309155/1309175 co-relation queries the response was YES. [2024-06-14 12:33:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83578 conditions, 7734 events. 5115/7734 cut-off events. For 1309155/1309175 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43911 event pairs, 1314 based on Foata normal form. 20/7754 useless extension candidates. Maximal degree in co-relation 83381. Up to 7093 conditions per place. [2024-06-14 12:33:24,393 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 577 selfloop transitions, 182 changer transitions 0/762 dead transitions. [2024-06-14 12:33:24,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 762 transitions, 16094 flow [2024-06-14 12:33:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:33:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:33:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:33:24,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 12:33:24,395 INFO L175 Difference]: Start difference. First operand has 421 places, 740 transitions, 14120 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:33:24,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 762 transitions, 16094 flow [2024-06-14 12:33:30,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 762 transitions, 15635 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-14 12:33:30,538 INFO L231 Difference]: Finished difference. Result has 422 places, 740 transitions, 14032 flow [2024-06-14 12:33:30,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13661, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14032, PETRI_PLACES=422, PETRI_TRANSITIONS=740} [2024-06-14 12:33:30,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-14 12:33:30,539 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 740 transitions, 14032 flow [2024-06-14 12:33:30,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:30,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:30,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:30,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:33:30,539 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:30,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash -227174308, now seen corresponding path program 4 times [2024-06-14 12:33:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:30,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675440711] [2024-06-14 12:33:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675440711] [2024-06-14 12:33:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675440711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:31,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:31,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:31,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72006584] [2024-06-14 12:33:31,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:31,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:31,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:31,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 740 transitions, 14032 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:31,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:31,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:31,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:33,902 INFO L124 PetriNetUnfolderBase]: 5151/7785 cut-off events. [2024-06-14 12:33:33,903 INFO L125 PetriNetUnfolderBase]: For 1352761/1352781 co-relation queries the response was YES. [2024-06-14 12:33:34,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84115 conditions, 7785 events. 5151/7785 cut-off events. For 1352761/1352781 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44230 event pairs, 1310 based on Foata normal form. 24/7809 useless extension candidates. Maximal degree in co-relation 83917. Up to 6806 conditions per place. [2024-06-14 12:33:34,074 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 557 selfloop transitions, 213 changer transitions 0/773 dead transitions. [2024-06-14 12:33:34,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 773 transitions, 16381 flow [2024-06-14 12:33:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:33:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:33:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:33:34,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-14 12:33:34,076 INFO L175 Difference]: Start difference. First operand has 422 places, 740 transitions, 14032 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:33:34,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 773 transitions, 16381 flow [2024-06-14 12:33:40,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 773 transitions, 15993 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 12:33:40,578 INFO L231 Difference]: Finished difference. Result has 423 places, 747 transitions, 14232 flow [2024-06-14 12:33:40,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13650, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14232, PETRI_PLACES=423, PETRI_TRANSITIONS=747} [2024-06-14 12:33:40,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 12:33:40,578 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 747 transitions, 14232 flow [2024-06-14 12:33:40,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:40,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:40,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:40,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:33:40,579 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:40,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash -227186398, now seen corresponding path program 5 times [2024-06-14 12:33:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:40,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753773453] [2024-06-14 12:33:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:41,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753773453] [2024-06-14 12:33:41,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753773453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:41,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:41,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365829072] [2024-06-14 12:33:41,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:41,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:41,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:41,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:41,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 747 transitions, 14232 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:41,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:41,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:41,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:44,117 INFO L124 PetriNetUnfolderBase]: 5139/7770 cut-off events. [2024-06-14 12:33:44,117 INFO L125 PetriNetUnfolderBase]: For 1327354/1327374 co-relation queries the response was YES. [2024-06-14 12:33:44,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83644 conditions, 7770 events. 5139/7770 cut-off events. For 1327354/1327374 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44172 event pairs, 1308 based on Foata normal form. 24/7794 useless extension candidates. Maximal degree in co-relation 83445. Up to 6802 conditions per place. [2024-06-14 12:33:44,247 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 559 selfloop transitions, 212 changer transitions 0/774 dead transitions. [2024-06-14 12:33:44,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 774 transitions, 16258 flow [2024-06-14 12:33:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:33:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:33:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:33:44,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-14 12:33:44,249 INFO L175 Difference]: Start difference. First operand has 423 places, 747 transitions, 14232 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:33:44,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 774 transitions, 16258 flow [2024-06-14 12:33:49,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 774 transitions, 15733 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:49,053 INFO L231 Difference]: Finished difference. Result has 426 places, 747 transitions, 14141 flow [2024-06-14 12:33:49,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13707, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14141, PETRI_PLACES=426, PETRI_TRANSITIONS=747} [2024-06-14 12:33:49,054 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 12:33:49,054 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 747 transitions, 14141 flow [2024-06-14 12:33:49,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:49,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:49,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:49,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:33:49,054 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:49,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:49,055 INFO L85 PathProgramCache]: Analyzing trace with hash 798345168, now seen corresponding path program 7 times [2024-06-14 12:33:49,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:49,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937716040] [2024-06-14 12:33:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:49,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:50,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:50,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937716040] [2024-06-14 12:33:50,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937716040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:50,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:50,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:50,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681341473] [2024-06-14 12:33:50,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:50,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:50,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:50,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:50,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:50,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:50,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 747 transitions, 14141 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:50,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:50,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:50,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:52,491 INFO L124 PetriNetUnfolderBase]: 5059/7691 cut-off events. [2024-06-14 12:33:52,491 INFO L125 PetriNetUnfolderBase]: For 1368077/1368110 co-relation queries the response was YES. [2024-06-14 12:33:52,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83645 conditions, 7691 events. 5059/7691 cut-off events. For 1368077/1368110 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 44018 event pairs, 1012 based on Foata normal form. 32/7716 useless extension candidates. Maximal degree in co-relation 83445. Up to 6545 conditions per place. [2024-06-14 12:33:52,636 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 509 selfloop transitions, 230 changer transitions 0/783 dead transitions. [2024-06-14 12:33:52,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 783 transitions, 16004 flow [2024-06-14 12:33:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:33:52,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:33:52,637 INFO L175 Difference]: Start difference. First operand has 426 places, 747 transitions, 14141 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:33:52,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 783 transitions, 16004 flow [2024-06-14 12:33:57,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 783 transitions, 15546 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:57,080 INFO L231 Difference]: Finished difference. Result has 428 places, 751 transitions, 14286 flow [2024-06-14 12:33:57,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13683, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14286, PETRI_PLACES=428, PETRI_TRANSITIONS=751} [2024-06-14 12:33:57,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 12:33:57,081 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 751 transitions, 14286 flow [2024-06-14 12:33:57,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:57,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:57,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:33:57,081 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:57,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1733796485, now seen corresponding path program 1 times [2024-06-14 12:33:57,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:57,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582889758] [2024-06-14 12:33:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:58,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:58,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582889758] [2024-06-14 12:33:58,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582889758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:58,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:58,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:33:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590896640] [2024-06-14 12:33:58,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:58,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:33:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:33:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:33:58,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:58,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 751 transitions, 14286 flow. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:58,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:58,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:58,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:00,917 INFO L124 PetriNetUnfolderBase]: 5185/7833 cut-off events. [2024-06-14 12:34:00,917 INFO L125 PetriNetUnfolderBase]: For 1379012/1379020 co-relation queries the response was YES. [2024-06-14 12:34:01,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84761 conditions, 7833 events. 5185/7833 cut-off events. For 1379012/1379020 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 44528 event pairs, 1339 based on Foata normal form. 14/7847 useless extension candidates. Maximal degree in co-relation 84559. Up to 6945 conditions per place. [2024-06-14 12:34:01,067 INFO L140 encePairwiseOnDemand]: 26/43 looper letters, 544 selfloop transitions, 240 changer transitions 0/787 dead transitions. [2024-06-14 12:34:01,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 787 transitions, 16454 flow [2024-06-14 12:34:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:34:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:34:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-14 12:34:01,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:34:01,069 INFO L175 Difference]: Start difference. First operand has 428 places, 751 transitions, 14286 flow. Second operand 11 states and 198 transitions. [2024-06-14 12:34:01,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 787 transitions, 16454 flow [2024-06-14 12:34:06,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 787 transitions, 15993 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:06,507 INFO L231 Difference]: Finished difference. Result has 432 places, 756 transitions, 14428 flow [2024-06-14 12:34:06,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13837, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14428, PETRI_PLACES=432, PETRI_TRANSITIONS=756} [2024-06-14 12:34:06,507 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-14 12:34:06,508 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 756 transitions, 14428 flow [2024-06-14 12:34:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:06,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:06,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:06,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:34:06,508 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:06,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1711090092, now seen corresponding path program 8 times [2024-06-14 12:34:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694013942] [2024-06-14 12:34:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:07,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:07,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694013942] [2024-06-14 12:34:07,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694013942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:07,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:07,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590006327] [2024-06-14 12:34:07,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:07,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:07,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:07,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 756 transitions, 14428 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:07,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:07,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:07,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:10,033 INFO L124 PetriNetUnfolderBase]: 5101/7761 cut-off events. [2024-06-14 12:34:10,033 INFO L125 PetriNetUnfolderBase]: For 1328779/1328788 co-relation queries the response was YES. [2024-06-14 12:34:10,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84491 conditions, 7761 events. 5101/7761 cut-off events. For 1328779/1328788 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 44649 event pairs, 1231 based on Foata normal form. 12/7770 useless extension candidates. Maximal degree in co-relation 84289. Up to 6919 conditions per place. [2024-06-14 12:34:10,175 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 545 selfloop transitions, 198 changer transitions 0/787 dead transitions. [2024-06-14 12:34:10,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 787 transitions, 16071 flow [2024-06-14 12:34:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:34:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:34:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:34:10,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-14 12:34:10,176 INFO L175 Difference]: Start difference. First operand has 432 places, 756 transitions, 14428 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:34:10,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 787 transitions, 16071 flow [2024-06-14 12:34:14,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 787 transitions, 15666 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:14,558 INFO L231 Difference]: Finished difference. Result has 435 places, 759 transitions, 14496 flow [2024-06-14 12:34:14,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14023, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14496, PETRI_PLACES=435, PETRI_TRANSITIONS=759} [2024-06-14 12:34:14,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-14 12:34:14,559 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 759 transitions, 14496 flow [2024-06-14 12:34:14,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:14,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:14,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:14,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:34:14,559 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:14,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1222404677, now seen corresponding path program 2 times [2024-06-14 12:34:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:14,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855519433] [2024-06-14 12:34:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:16,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:16,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855519433] [2024-06-14 12:34:16,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855519433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:16,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:16,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:34:16,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301953407] [2024-06-14 12:34:16,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:16,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:34:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:34:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:34:16,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:16,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 759 transitions, 14496 flow. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:16,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:16,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:16,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:19,218 INFO L124 PetriNetUnfolderBase]: 5309/8011 cut-off events. [2024-06-14 12:34:19,218 INFO L125 PetriNetUnfolderBase]: For 1384939/1384947 co-relation queries the response was YES. [2024-06-14 12:34:19,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86645 conditions, 8011 events. 5309/8011 cut-off events. For 1384939/1384947 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45609 event pairs, 1331 based on Foata normal form. 14/8025 useless extension candidates. Maximal degree in co-relation 86442. Up to 6808 conditions per place. [2024-06-14 12:34:19,383 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 542 selfloop transitions, 270 changer transitions 0/815 dead transitions. [2024-06-14 12:34:19,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 815 transitions, 17075 flow [2024-06-14 12:34:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 12:34:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 12:34:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 251 transitions. [2024-06-14 12:34:19,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169435215946844 [2024-06-14 12:34:19,384 INFO L175 Difference]: Start difference. First operand has 435 places, 759 transitions, 14496 flow. Second operand 14 states and 251 transitions. [2024-06-14 12:34:19,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 815 transitions, 17075 flow [2024-06-14 12:34:24,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 815 transitions, 16664 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 12:34:24,549 INFO L231 Difference]: Finished difference. Result has 440 places, 774 transitions, 14886 flow [2024-06-14 12:34:24,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14085, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14886, PETRI_PLACES=440, PETRI_TRANSITIONS=774} [2024-06-14 12:34:24,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 12:34:24,549 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 774 transitions, 14886 flow [2024-06-14 12:34:24,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:24,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:24,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:24,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:34:24,550 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:24,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 798584488, now seen corresponding path program 6 times [2024-06-14 12:34:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:24,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263096553] [2024-06-14 12:34:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:24,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263096553] [2024-06-14 12:34:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263096553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:25,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:25,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531229756] [2024-06-14 12:34:25,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:25,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:25,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:25,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 774 transitions, 14886 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:25,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:25,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:25,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:28,233 INFO L124 PetriNetUnfolderBase]: 5389/8123 cut-off events. [2024-06-14 12:34:28,233 INFO L125 PetriNetUnfolderBase]: For 1399755/1399763 co-relation queries the response was YES. [2024-06-14 12:34:28,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88835 conditions, 8123 events. 5389/8123 cut-off events. For 1399755/1399763 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46299 event pairs, 1312 based on Foata normal form. 10/8133 useless extension candidates. Maximal degree in co-relation 88631. Up to 7217 conditions per place. [2024-06-14 12:34:28,381 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 536 selfloop transitions, 295 changer transitions 0/834 dead transitions. [2024-06-14 12:34:28,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 834 transitions, 17496 flow [2024-06-14 12:34:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:34:28,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:34:28,382 INFO L175 Difference]: Start difference. First operand has 440 places, 774 transitions, 14886 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:34:28,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 834 transitions, 17496 flow [2024-06-14 12:34:34,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 834 transitions, 17041 flow, removed 62 selfloop flow, removed 10 redundant places. [2024-06-14 12:34:34,639 INFO L231 Difference]: Finished difference. Result has 440 places, 806 transitions, 15519 flow [2024-06-14 12:34:34,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14449, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15519, PETRI_PLACES=440, PETRI_TRANSITIONS=806} [2024-06-14 12:34:34,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 12:34:34,639 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 806 transitions, 15519 flow [2024-06-14 12:34:34,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:34,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:34,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:34,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:34:34,640 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:34,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash 806916358, now seen corresponding path program 7 times [2024-06-14 12:34:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:34,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224878138] [2024-06-14 12:34:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:34,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:35,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:35,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224878138] [2024-06-14 12:34:35,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224878138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:35,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:35,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:35,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607231346] [2024-06-14 12:34:35,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:35,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:35,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:35,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:35,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:35,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:35,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 806 transitions, 15519 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:35,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:35,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:35,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:38,135 INFO L124 PetriNetUnfolderBase]: 5445/8197 cut-off events. [2024-06-14 12:34:38,135 INFO L125 PetriNetUnfolderBase]: For 1431375/1431383 co-relation queries the response was YES. [2024-06-14 12:34:38,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90312 conditions, 8197 events. 5445/8197 cut-off events. For 1431375/1431383 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46688 event pairs, 1331 based on Foata normal form. 10/8207 useless extension candidates. Maximal degree in co-relation 90105. Up to 7486 conditions per place. [2024-06-14 12:34:38,286 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 594 selfloop transitions, 252 changer transitions 0/849 dead transitions. [2024-06-14 12:34:38,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 849 transitions, 17973 flow [2024-06-14 12:34:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:34:38,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:34:38,287 INFO L175 Difference]: Start difference. First operand has 440 places, 806 transitions, 15519 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:34:38,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 849 transitions, 17973 flow [2024-06-14 12:34:44,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 849 transitions, 17404 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:44,746 INFO L231 Difference]: Finished difference. Result has 444 places, 826 transitions, 15764 flow [2024-06-14 12:34:44,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14996, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15764, PETRI_PLACES=444, PETRI_TRANSITIONS=826} [2024-06-14 12:34:44,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-14 12:34:44,747 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 826 transitions, 15764 flow [2024-06-14 12:34:44,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:44,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:44,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:44,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:34:44,748 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:44,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1838535784, now seen corresponding path program 6 times [2024-06-14 12:34:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768105031] [2024-06-14 12:34:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:45,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768105031] [2024-06-14 12:34:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768105031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:45,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:45,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163371624] [2024-06-14 12:34:45,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:45,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:46,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:46,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 826 transitions, 15764 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:46,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:46,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:46,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:48,310 INFO L124 PetriNetUnfolderBase]: 5539/8327 cut-off events. [2024-06-14 12:34:48,310 INFO L125 PetriNetUnfolderBase]: For 1521443/1521451 co-relation queries the response was YES. [2024-06-14 12:34:48,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92573 conditions, 8327 events. 5539/8327 cut-off events. For 1521443/1521451 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 47509 event pairs, 1355 based on Foata normal form. 14/8341 useless extension candidates. Maximal degree in co-relation 92365. Up to 7234 conditions per place. [2024-06-14 12:34:48,474 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 587 selfloop transitions, 279 changer transitions 0/869 dead transitions. [2024-06-14 12:34:48,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 869 transitions, 18392 flow [2024-06-14 12:34:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:34:48,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:34:48,476 INFO L175 Difference]: Start difference. First operand has 444 places, 826 transitions, 15764 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:34:48,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 869 transitions, 18392 flow [2024-06-14 12:34:54,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 869 transitions, 18050 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:54,962 INFO L231 Difference]: Finished difference. Result has 448 places, 841 transitions, 16562 flow [2024-06-14 12:34:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15422, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16562, PETRI_PLACES=448, PETRI_TRANSITIONS=841} [2024-06-14 12:34:54,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-14 12:34:54,963 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 841 transitions, 16562 flow [2024-06-14 12:34:54,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:54,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:54,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:34:54,965 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:54,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1838535412, now seen corresponding path program 8 times [2024-06-14 12:34:54,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180473986] [2024-06-14 12:34:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:56,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180473986] [2024-06-14 12:34:56,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180473986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:56,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:56,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:56,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7481001] [2024-06-14 12:34:56,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:56,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:56,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 841 transitions, 16562 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:56,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:56,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:56,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:58,899 INFO L124 PetriNetUnfolderBase]: 5533/8319 cut-off events. [2024-06-14 12:34:58,899 INFO L125 PetriNetUnfolderBase]: For 1524802/1524810 co-relation queries the response was YES. [2024-06-14 12:34:59,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94331 conditions, 8319 events. 5533/8319 cut-off events. For 1524802/1524810 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 47409 event pairs, 1365 based on Foata normal form. 10/8329 useless extension candidates. Maximal degree in co-relation 94121. Up to 7664 conditions per place. [2024-06-14 12:34:59,062 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 634 selfloop transitions, 226 changer transitions 0/863 dead transitions. [2024-06-14 12:34:59,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 863 transitions, 18566 flow [2024-06-14 12:34:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:34:59,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:34:59,064 INFO L175 Difference]: Start difference. First operand has 448 places, 841 transitions, 16562 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:34:59,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 863 transitions, 18566 flow [2024-06-14 12:35:05,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 863 transitions, 18289 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:05,788 INFO L231 Difference]: Finished difference. Result has 452 places, 841 transitions, 16763 flow [2024-06-14 12:35:05,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16289, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16763, PETRI_PLACES=452, PETRI_TRANSITIONS=841} [2024-06-14 12:35:05,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-14 12:35:05,789 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 841 transitions, 16763 flow [2024-06-14 12:35:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:05,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:05,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:35:05,790 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:05,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash 916675020, now seen corresponding path program 4 times [2024-06-14 12:35:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:05,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928639436] [2024-06-14 12:35:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:05,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928639436] [2024-06-14 12:35:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928639436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:06,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:06,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:06,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551179640] [2024-06-14 12:35:06,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:06,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:06,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:06,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:06,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:06,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:06,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 841 transitions, 16763 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:06,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:06,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:06,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:09,721 INFO L124 PetriNetUnfolderBase]: 5469/8278 cut-off events. [2024-06-14 12:35:09,722 INFO L125 PetriNetUnfolderBase]: For 1532314/1532334 co-relation queries the response was YES. [2024-06-14 12:35:09,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94006 conditions, 8278 events. 5469/8278 cut-off events. For 1532314/1532334 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47770 event pairs, 1245 based on Foata normal form. 26/8304 useless extension candidates. Maximal degree in co-relation 93795. Up to 7315 conditions per place. [2024-06-14 12:35:09,858 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 699 selfloop transitions, 128 changer transitions 0/880 dead transitions. [2024-06-14 12:35:09,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 880 transitions, 18795 flow [2024-06-14 12:35:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:35:09,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:35:09,859 INFO L175 Difference]: Start difference. First operand has 452 places, 841 transitions, 16763 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:35:09,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 880 transitions, 18795 flow [2024-06-14 12:35:17,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 880 transitions, 18502 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:17,940 INFO L231 Difference]: Finished difference. Result has 455 places, 850 transitions, 16945 flow [2024-06-14 12:35:17,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16470, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16945, PETRI_PLACES=455, PETRI_TRANSITIONS=850} [2024-06-14 12:35:17,941 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-14 12:35:17,941 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 850 transitions, 16945 flow [2024-06-14 12:35:17,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:17,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:17,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:17,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:35:17,942 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:17,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash 916795176, now seen corresponding path program 4 times [2024-06-14 12:35:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:17,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657343060] [2024-06-14 12:35:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:19,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657343060] [2024-06-14 12:35:19,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657343060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:19,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:19,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504056736] [2024-06-14 12:35:19,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:19,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:19,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:19,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:19,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 850 transitions, 16945 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:19,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:19,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:19,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:22,338 INFO L124 PetriNetUnfolderBase]: 5609/8429 cut-off events. [2024-06-14 12:35:22,338 INFO L125 PetriNetUnfolderBase]: For 1554653/1554673 co-relation queries the response was YES. [2024-06-14 12:35:22,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96119 conditions, 8429 events. 5609/8429 cut-off events. For 1554653/1554673 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 48197 event pairs, 1392 based on Foata normal form. 22/8451 useless extension candidates. Maximal degree in co-relation 95907. Up to 7773 conditions per place. [2024-06-14 12:35:22,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 673 selfloop transitions, 211 changer transitions 0/887 dead transitions. [2024-06-14 12:35:22,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 887 transitions, 19645 flow [2024-06-14 12:35:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:35:22,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:35:22,587 INFO L175 Difference]: Start difference. First operand has 455 places, 850 transitions, 16945 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:35:22,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 887 transitions, 19645 flow [2024-06-14 12:35:29,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 887 transitions, 19235 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:29,385 INFO L231 Difference]: Finished difference. Result has 458 places, 866 transitions, 17481 flow [2024-06-14 12:35:29,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16535, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17481, PETRI_PLACES=458, PETRI_TRANSITIONS=866} [2024-06-14 12:35:29,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 12:35:29,386 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 866 transitions, 17481 flow [2024-06-14 12:35:29,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:29,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:29,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:29,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:35:29,387 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:29,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash 916794990, now seen corresponding path program 5 times [2024-06-14 12:35:29,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:29,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781954896] [2024-06-14 12:35:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:29,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:30,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:30,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781954896] [2024-06-14 12:35:30,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781954896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:30,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:30,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464138826] [2024-06-14 12:35:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:30,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:30,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 866 transitions, 17481 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:30,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:30,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:30,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:33,786 INFO L124 PetriNetUnfolderBase]: 5591/8447 cut-off events. [2024-06-14 12:35:33,786 INFO L125 PetriNetUnfolderBase]: For 1643127/1643147 co-relation queries the response was YES. [2024-06-14 12:35:33,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97690 conditions, 8447 events. 5591/8447 cut-off events. For 1643127/1643147 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 48768 event pairs, 1277 based on Foata normal form. 26/8473 useless extension candidates. Maximal degree in co-relation 97476. Up to 7062 conditions per place. [2024-06-14 12:35:33,937 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 657 selfloop transitions, 202 changer transitions 0/917 dead transitions. [2024-06-14 12:35:33,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 917 transitions, 20269 flow [2024-06-14 12:35:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:35:33,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 12:35:33,938 INFO L175 Difference]: Start difference. First operand has 458 places, 866 transitions, 17481 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:35:33,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 917 transitions, 20269 flow [2024-06-14 12:35:41,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 917 transitions, 20015 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:41,935 INFO L231 Difference]: Finished difference. Result has 462 places, 884 transitions, 18149 flow [2024-06-14 12:35:41,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17237, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18149, PETRI_PLACES=462, PETRI_TRANSITIONS=884} [2024-06-14 12:35:41,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-14 12:35:41,936 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 884 transitions, 18149 flow [2024-06-14 12:35:41,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:41,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:41,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:41,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:35:41,937 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:41,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1094163846, now seen corresponding path program 5 times [2024-06-14 12:35:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:41,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899042371] [2024-06-14 12:35:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:41,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:42,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899042371] [2024-06-14 12:35:42,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899042371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:42,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:42,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:42,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54295428] [2024-06-14 12:35:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:42,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:42,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:42,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 884 transitions, 18149 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:42,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:42,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:42,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:45,995 INFO L124 PetriNetUnfolderBase]: 5707/8564 cut-off events. [2024-06-14 12:35:45,996 INFO L125 PetriNetUnfolderBase]: For 1612797/1612817 co-relation queries the response was YES. [2024-06-14 12:35:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99515 conditions, 8564 events. 5707/8564 cut-off events. For 1612797/1612817 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 48851 event pairs, 1356 based on Foata normal form. 20/8584 useless extension candidates. Maximal degree in co-relation 99300. Up to 7905 conditions per place. [2024-06-14 12:35:46,142 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 699 selfloop transitions, 203 changer transitions 0/905 dead transitions. [2024-06-14 12:35:46,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 905 transitions, 20527 flow [2024-06-14 12:35:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:35:46,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:35:46,144 INFO L175 Difference]: Start difference. First operand has 462 places, 884 transitions, 18149 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:35:46,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 905 transitions, 20527 flow [2024-06-14 12:35:54,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 905 transitions, 20197 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:54,410 INFO L231 Difference]: Finished difference. Result has 466 places, 888 transitions, 18351 flow [2024-06-14 12:35:54,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17819, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18351, PETRI_PLACES=466, PETRI_TRANSITIONS=888} [2024-06-14 12:35:54,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-14 12:35:54,411 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 888 transitions, 18351 flow [2024-06-14 12:35:54,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:54,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:54,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:54,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:35:54,412 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:54,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1093926510, now seen corresponding path program 6 times [2024-06-14 12:35:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:54,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100659644] [2024-06-14 12:35:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:55,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:55,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100659644] [2024-06-14 12:35:55,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100659644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:55,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16088765] [2024-06-14 12:35:55,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:55,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:55,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:55,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:55,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:55,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 888 transitions, 18351 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:55,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:55,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:55,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:58,101 INFO L124 PetriNetUnfolderBase]: 5655/8532 cut-off events. [2024-06-14 12:35:58,102 INFO L125 PetriNetUnfolderBase]: For 1681112/1681132 co-relation queries the response was YES. [2024-06-14 12:35:58,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100385 conditions, 8532 events. 5655/8532 cut-off events. For 1681112/1681132 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 49174 event pairs, 1283 based on Foata normal form. 22/8554 useless extension candidates. Maximal degree in co-relation 100169. Up to 7112 conditions per place. [2024-06-14 12:35:58,456 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 646 selfloop transitions, 219 changer transitions 0/924 dead transitions. [2024-06-14 12:35:58,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 924 transitions, 20942 flow [2024-06-14 12:35:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:35:58,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:35:58,457 INFO L175 Difference]: Start difference. First operand has 466 places, 888 transitions, 18351 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:35:58,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 924 transitions, 20942 flow [2024-06-14 12:36:05,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 924 transitions, 20602 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:05,913 INFO L231 Difference]: Finished difference. Result has 468 places, 899 transitions, 18726 flow [2024-06-14 12:36:05,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18015, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18726, PETRI_PLACES=468, PETRI_TRANSITIONS=899} [2024-06-14 12:36:05,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 424 predicate places. [2024-06-14 12:36:05,914 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 899 transitions, 18726 flow [2024-06-14 12:36:05,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:05,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:05,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:36:05,914 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:05,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1093926696, now seen corresponding path program 6 times [2024-06-14 12:36:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:05,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296527874] [2024-06-14 12:36:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296527874] [2024-06-14 12:36:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296527874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:06,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:06,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319116348] [2024-06-14 12:36:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:06,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:06,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 899 transitions, 18726 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:06,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:06,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:10,165 INFO L124 PetriNetUnfolderBase]: 5753/8628 cut-off events. [2024-06-14 12:36:10,166 INFO L125 PetriNetUnfolderBase]: For 1653894/1653914 co-relation queries the response was YES. [2024-06-14 12:36:10,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100942 conditions, 8628 events. 5753/8628 cut-off events. For 1653894/1653914 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49302 event pairs, 1362 based on Foata normal form. 20/8648 useless extension candidates. Maximal degree in co-relation 100726. Up to 7972 conditions per place. [2024-06-14 12:36:10,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 714 selfloop transitions, 199 changer transitions 0/916 dead transitions. [2024-06-14 12:36:10,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 916 transitions, 21026 flow [2024-06-14 12:36:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:36:10,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:36:10,342 INFO L175 Difference]: Start difference. First operand has 468 places, 899 transitions, 18726 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:36:10,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 916 transitions, 21026 flow [2024-06-14 12:36:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 916 transitions, 20708 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:18,074 INFO L231 Difference]: Finished difference. Result has 471 places, 899 transitions, 18823 flow [2024-06-14 12:36:18,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18412, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18823, PETRI_PLACES=471, PETRI_TRANSITIONS=899} [2024-06-14 12:36:18,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-14 12:36:18,075 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 899 transitions, 18823 flow [2024-06-14 12:36:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:18,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:18,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:18,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:36:18,076 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:18,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1094172340, now seen corresponding path program 7 times [2024-06-14 12:36:18,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:18,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891681328] [2024-06-14 12:36:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:18,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:18,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891681328] [2024-06-14 12:36:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891681328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:18,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:18,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713446466] [2024-06-14 12:36:18,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:18,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:18,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:19,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:19,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 899 transitions, 18823 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:19,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:19,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:19,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:22,157 INFO L124 PetriNetUnfolderBase]: 5885/8811 cut-off events. [2024-06-14 12:36:22,157 INFO L125 PetriNetUnfolderBase]: For 1746250/1746270 co-relation queries the response was YES. [2024-06-14 12:36:22,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103820 conditions, 8811 events. 5885/8811 cut-off events. For 1746250/1746270 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 50391 event pairs, 1372 based on Foata normal form. 24/8835 useless extension candidates. Maximal degree in co-relation 103604. Up to 7589 conditions per place. [2024-06-14 12:36:22,356 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 676 selfloop transitions, 268 changer transitions 0/947 dead transitions. [2024-06-14 12:36:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 947 transitions, 21987 flow [2024-06-14 12:36:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:36:22,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:36:22,358 INFO L175 Difference]: Start difference. First operand has 471 places, 899 transitions, 18823 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:36:22,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 947 transitions, 21987 flow [2024-06-14 12:36:30,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 947 transitions, 21677 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:30,108 INFO L231 Difference]: Finished difference. Result has 475 places, 918 transitions, 19617 flow [2024-06-14 12:36:30,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18519, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19617, PETRI_PLACES=475, PETRI_TRANSITIONS=918} [2024-06-14 12:36:30,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-14 12:36:30,109 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 918 transitions, 19617 flow [2024-06-14 12:36:30,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:30,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:30,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:30,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:36:30,110 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:30,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1094159878, now seen corresponding path program 9 times [2024-06-14 12:36:30,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944654883] [2024-06-14 12:36:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:30,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:31,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:31,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944654883] [2024-06-14 12:36:31,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944654883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:31,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:31,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:31,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093925853] [2024-06-14 12:36:31,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:31,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:31,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:31,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 918 transitions, 19617 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:31,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:31,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:31,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:34,841 INFO L124 PetriNetUnfolderBase]: 5929/8868 cut-off events. [2024-06-14 12:36:34,841 INFO L125 PetriNetUnfolderBase]: For 1750800/1750852 co-relation queries the response was YES. [2024-06-14 12:36:34,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105525 conditions, 8868 events. 5929/8868 cut-off events. For 1750800/1750852 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 50566 event pairs, 1135 based on Foata normal form. 52/8920 useless extension candidates. Maximal degree in co-relation 105308. Up to 7773 conditions per place. [2024-06-14 12:36:35,019 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 679 selfloop transitions, 270 changer transitions 0/952 dead transitions. [2024-06-14 12:36:35,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 952 transitions, 22430 flow [2024-06-14 12:36:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:36:35,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:36:35,021 INFO L175 Difference]: Start difference. First operand has 475 places, 918 transitions, 19617 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:36:35,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 952 transitions, 22430 flow [2024-06-14 12:36:42,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 952 transitions, 21767 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:42,498 INFO L231 Difference]: Finished difference. Result has 478 places, 933 transitions, 19911 flow [2024-06-14 12:36:42,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18960, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19911, PETRI_PLACES=478, PETRI_TRANSITIONS=933} [2024-06-14 12:36:42,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-14 12:36:42,499 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 933 transitions, 19911 flow [2024-06-14 12:36:42,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:42,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:42,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:42,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:36:42,499 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:42,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1094160250, now seen corresponding path program 8 times [2024-06-14 12:36:42,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:42,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190277903] [2024-06-14 12:36:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:42,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:43,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190277903] [2024-06-14 12:36:43,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190277903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:43,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:43,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:43,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880597429] [2024-06-14 12:36:43,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:43,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:43,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:43,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:43,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 933 transitions, 19911 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:43,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:43,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:43,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:46,740 INFO L124 PetriNetUnfolderBase]: 5965/8923 cut-off events. [2024-06-14 12:36:46,740 INFO L125 PetriNetUnfolderBase]: For 1777534/1777554 co-relation queries the response was YES. [2024-06-14 12:36:46,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106157 conditions, 8923 events. 5965/8923 cut-off events. For 1777534/1777554 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 51049 event pairs, 1350 based on Foata normal form. 24/8947 useless extension candidates. Maximal degree in co-relation 105938. Up to 7679 conditions per place. [2024-06-14 12:36:46,922 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 695 selfloop transitions, 273 changer transitions 0/971 dead transitions. [2024-06-14 12:36:46,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 971 transitions, 22660 flow [2024-06-14 12:36:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:36:46,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:36:46,926 INFO L175 Difference]: Start difference. First operand has 478 places, 933 transitions, 19911 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:36:46,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 971 transitions, 22660 flow [2024-06-14 12:36:53,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 971 transitions, 22362 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:53,375 INFO L231 Difference]: Finished difference. Result has 482 places, 940 transitions, 20369 flow [2024-06-14 12:36:53,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19621, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20369, PETRI_PLACES=482, PETRI_TRANSITIONS=940} [2024-06-14 12:36:53,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-14 12:36:53,376 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 940 transitions, 20369 flow [2024-06-14 12:36:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:53,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:53,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:53,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:36:53,379 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:53,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1093814290, now seen corresponding path program 9 times [2024-06-14 12:36:53,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:53,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595679143] [2024-06-14 12:36:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:53,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:54,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:54,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595679143] [2024-06-14 12:36:54,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595679143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:54,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:54,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037208161] [2024-06-14 12:36:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:54,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:54,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 940 transitions, 20369 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:54,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:54,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:54,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:57,982 INFO L124 PetriNetUnfolderBase]: 6237/9309 cut-off events. [2024-06-14 12:36:57,982 INFO L125 PetriNetUnfolderBase]: For 1773088/1773090 co-relation queries the response was YES. [2024-06-14 12:36:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109839 conditions, 9309 events. 6237/9309 cut-off events. For 1773088/1773090 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 53445 event pairs, 1914 based on Foata normal form. 8/9317 useless extension candidates. Maximal degree in co-relation 109621. Up to 8237 conditions per place. [2024-06-14 12:36:58,149 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 809 selfloop transitions, 243 changer transitions 0/1055 dead transitions. [2024-06-14 12:36:58,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1055 transitions, 25225 flow [2024-06-14 12:36:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:36:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:36:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:36:58,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 12:36:58,150 INFO L175 Difference]: Start difference. First operand has 482 places, 940 transitions, 20369 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:36:58,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1055 transitions, 25225 flow [2024-06-14 12:37:06,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1055 transitions, 24683 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:06,381 INFO L231 Difference]: Finished difference. Result has 488 places, 1001 transitions, 22166 flow [2024-06-14 12:37:06,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19902, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22166, PETRI_PLACES=488, PETRI_TRANSITIONS=1001} [2024-06-14 12:37:06,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 444 predicate places. [2024-06-14 12:37:06,382 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 1001 transitions, 22166 flow [2024-06-14 12:37:06,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:06,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:06,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:06,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:37:06,382 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:06,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:06,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1093803688, now seen corresponding path program 10 times [2024-06-14 12:37:06,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:06,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514435201] [2024-06-14 12:37:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:06,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:07,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:07,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514435201] [2024-06-14 12:37:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514435201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:07,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:07,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:07,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671204770] [2024-06-14 12:37:07,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:07,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:07,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:07,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 1001 transitions, 22166 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:07,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:07,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:07,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:11,393 INFO L124 PetriNetUnfolderBase]: 6231/9296 cut-off events. [2024-06-14 12:37:11,394 INFO L125 PetriNetUnfolderBase]: For 1748469/1748489 co-relation queries the response was YES. [2024-06-14 12:37:11,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109918 conditions, 9296 events. 6231/9296 cut-off events. For 1748469/1748489 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 53323 event pairs, 1372 based on Foata normal form. 20/9316 useless extension candidates. Maximal degree in co-relation 109697. Up to 8548 conditions per place. [2024-06-14 12:37:11,561 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 767 selfloop transitions, 251 changer transitions 0/1021 dead transitions. [2024-06-14 12:37:11,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1021 transitions, 24707 flow [2024-06-14 12:37:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:37:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:37:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 12:37:11,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 12:37:11,562 INFO L175 Difference]: Start difference. First operand has 488 places, 1001 transitions, 22166 flow. Second operand 10 states and 168 transitions. [2024-06-14 12:37:11,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1021 transitions, 24707 flow [2024-06-14 12:37:19,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1021 transitions, 24222 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:19,378 INFO L231 Difference]: Finished difference. Result has 491 places, 1002 transitions, 22235 flow [2024-06-14 12:37:19,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21681, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22235, PETRI_PLACES=491, PETRI_TRANSITIONS=1002} [2024-06-14 12:37:19,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-14 12:37:19,379 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1002 transitions, 22235 flow [2024-06-14 12:37:19,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:19,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:19,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:19,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:37:19,379 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:19,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1093803378, now seen corresponding path program 9 times [2024-06-14 12:37:19,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:19,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522586703] [2024-06-14 12:37:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:20,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:20,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522586703] [2024-06-14 12:37:20,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522586703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:20,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:20,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:20,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033310777] [2024-06-14 12:37:20,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:20,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:20,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:20,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:20,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1002 transitions, 22235 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:20,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:20,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:20,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:24,146 INFO L124 PetriNetUnfolderBase]: 6126/9199 cut-off events. [2024-06-14 12:37:24,146 INFO L125 PetriNetUnfolderBase]: For 1789041/1789061 co-relation queries the response was YES. [2024-06-14 12:37:24,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109659 conditions, 9199 events. 6126/9199 cut-off events. For 1789041/1789061 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 53354 event pairs, 1323 based on Foata normal form. 22/9221 useless extension candidates. Maximal degree in co-relation 109438. Up to 8417 conditions per place. [2024-06-14 12:37:24,505 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 814 selfloop transitions, 145 changer transitions 0/1022 dead transitions. [2024-06-14 12:37:24,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1022 transitions, 24270 flow [2024-06-14 12:37:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:37:24,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:37:24,507 INFO L175 Difference]: Start difference. First operand has 491 places, 1002 transitions, 22235 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:37:24,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1022 transitions, 24270 flow