./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix016_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/mix016_power.opt_rmo.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix016_power.opt_rmo.opt.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:09:58,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:09:58,089 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:09:58,097 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:09:58,098 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:09:58,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:09:58,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:09:58,124 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:09:58,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:09:58,127 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:09:58,127 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:09:58,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:09:58,128 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:09:58,129 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:09:58,130 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:09:58,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:09:58,130 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:09:58,130 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:09:58,130 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:09:58,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:09:58,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:09:58,131 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:09:58,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:09:58,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:09:58,132 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:09:58,132 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:09:58,132 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:09:58,132 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:09:58,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:09:58,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:09:58,134 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:09:58,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:09:58,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:09:58,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:09:58,134 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:09:58,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:09:58,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:09:58,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:09:58,135 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:09:58,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:09:58,135 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:09:58,136 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:09:58,136 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:09:58,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:09:58,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:09:58,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:09:58,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:09:58,397 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:09:58,397 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:09:58,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-05-12 13:09:59,505 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:09:59,718 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:09:59,719 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-05-12 13:09:59,739 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d78d12300/428cabebeb9948529ca77c413f18d321/FLAG8fde55508 [2024-05-12 13:09:59,750 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d78d12300/428cabebeb9948529ca77c413f18d321 [2024-05-12 13:09:59,752 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:09:59,753 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:09:59,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix016_power.opt_rmo.opt.yml/witness.yml [2024-05-12 13:09:59,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:09:59,889 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:09:59,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:09:59,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:09:59,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:09:59,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:09:59" (1/2) ... [2024-05-12 13:09:59,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7447c991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:09:59, skipping insertion in model container [2024-05-12 13:09:59,895 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:09:59" (1/2) ... [2024-05-12 13:09:59,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f42b9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:09:59, skipping insertion in model container [2024-05-12 13:09:59,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:59" (2/2) ... [2024-05-12 13:09:59,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7447c991 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:59, skipping insertion in model container [2024-05-12 13:09:59,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:59" (2/2) ... [2024-05-12 13:09:59,897 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:10:00,005 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:10:00,007 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-05-12 13:10:00,007 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-05-12 13:10:00,007 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-05-12 13:10:00,007 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:10:00,007 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-05-12 13:10:00,066 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:10:00,215 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i[1001,1014] [2024-05-12 13:10:00,358 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:10:00,365 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:10:00,396 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i[1001,1014] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:10:00,483 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:10:00,529 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:10:00,529 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00 WrapperNode [2024-05-12 13:10:00,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:10:00,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:10:00,531 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:10:00,531 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:10:00,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,603 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2024-05-12 13:10:00,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:10:00,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:10:00,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:10:00,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:10:00,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,648 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 13:10:00,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,654 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,660 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,673 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,679 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:10:00,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:10:00,684 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:10:00,685 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:10:00,685 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (1/1) ... [2024-05-12 13:10:00,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:10:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:10:00,726 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) [2024-05-12 13:10:00,740 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 [2024-05-12 13:10:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:10:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:10:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:10:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:10:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:10:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:10:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:10:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:10:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:10:00,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:10:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:10:00,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:10:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:10:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:10:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:10:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:10:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:10:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:10:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:10:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:10:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:10:00,783 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 13:10:00,923 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:10:00,924 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:10:01,249 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:10:01,249 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:10:01,399 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:10:01,400 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:10:01,400 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:10:01 BoogieIcfgContainer [2024-05-12 13:10:01,400 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:10:01,402 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:10:01,402 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:10:01,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:10:01,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:09:59" (1/4) ... [2024-05-12 13:10:01,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3db800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:10:01, skipping insertion in model container [2024-05-12 13:10:01,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:59" (2/4) ... [2024-05-12 13:10:01,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3db800 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:10:01, skipping insertion in model container [2024-05-12 13:10:01,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:10:00" (3/4) ... [2024-05-12 13:10:01,406 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3db800 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:10:01, skipping insertion in model container [2024-05-12 13:10:01,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:10:01" (4/4) ... [2024-05-12 13:10:01,407 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016_power.opt_rmo.opt.i [2024-05-12 13:10:01,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:10:01,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:10:01,420 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:10:01,451 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:10:01,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-05-12 13:10:01,493 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-05-12 13:10:01,493 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:10:01,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-05-12 13:10:01,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-05-12 13:10:01,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 99 flow [2024-05-12 13:10:01,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:10:01,510 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;@27f4bfe4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:10:01,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:10:01,513 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:10:01,513 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:10:01,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:10:01,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:01,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:10:01,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:01,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1849679718, now seen corresponding path program 1 times [2024-05-12 13:10:01,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:01,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904293093] [2024-05-12 13:10:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:01,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:02,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904293093] [2024-05-12 13:10:02,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904293093] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:02,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:02,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:10:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470034716] [2024-05-12 13:10:02,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:10:02,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:02,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:10:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:10:02,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-05-12 13:10:02,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:02,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:02,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-05-12 13:10:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:03,136 INFO L124 PetriNetUnfolderBase]: 2610/4461 cut-off events. [2024-05-12 13:10:03,137 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-05-12 13:10:03,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8338 conditions, 4461 events. 2610/4461 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 29218 event pairs, 2067 based on Foata normal form. 121/4138 useless extension candidates. Maximal degree in co-relation 8323. Up to 3786 conditions per place. [2024-05-12 13:10:03,164 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 41 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-05-12 13:10:03,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 225 flow [2024-05-12 13:10:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:10:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:10:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-05-12 13:10:03,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-05-12 13:10:03,177 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 99 flow. Second operand 3 states and 99 transitions. [2024-05-12 13:10:03,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 225 flow [2024-05-12 13:10:03,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:03,185 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 131 flow [2024-05-12 13:10:03,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-05-12 13:10:03,189 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-05-12 13:10:03,190 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 131 flow [2024-05-12 13:10:03,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:03,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:03,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:03,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:10:03,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:03,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:03,191 INFO L85 PathProgramCache]: Analyzing trace with hash 574280057, now seen corresponding path program 1 times [2024-05-12 13:10:03,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:03,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717476817] [2024-05-12 13:10:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:03,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:03,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717476817] [2024-05-12 13:10:03,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717476817] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:03,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:03,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:10:03,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638595457] [2024-05-12 13:10:03,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:03,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:10:03,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:10:03,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:10:03,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-05-12 13:10:03,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:03,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:03,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-05-12 13:10:03,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:04,258 INFO L124 PetriNetUnfolderBase]: 3117/5112 cut-off events. [2024-05-12 13:10:04,258 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-05-12 13:10:04,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10874 conditions, 5112 events. 3117/5112 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 32065 event pairs, 1392 based on Foata normal form. 6/4744 useless extension candidates. Maximal degree in co-relation 10859. Up to 4451 conditions per place. [2024-05-12 13:10:04,281 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 54 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-05-12 13:10:04,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 325 flow [2024-05-12 13:10:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:10:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:10:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-05-12 13:10:04,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-05-12 13:10:04,283 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 131 flow. Second operand 4 states and 126 transitions. [2024-05-12 13:10:04,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 325 flow [2024-05-12 13:10:04,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:10:04,285 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 177 flow [2024-05-12 13:10:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-05-12 13:10:04,286 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-05-12 13:10:04,286 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 177 flow [2024-05-12 13:10:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:04,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:10:04,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:04,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash 622330301, now seen corresponding path program 1 times [2024-05-12 13:10:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255988673] [2024-05-12 13:10:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:04,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:04,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255988673] [2024-05-12 13:10:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255988673] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:04,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:04,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:10:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157660889] [2024-05-12 13:10:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:10:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:10:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:10:04,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-05-12 13:10:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:04,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-05-12 13:10:04,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:04,552 INFO L124 PetriNetUnfolderBase]: 885/1850 cut-off events. [2024-05-12 13:10:04,553 INFO L125 PetriNetUnfolderBase]: For 468/540 co-relation queries the response was YES. [2024-05-12 13:10:04,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 1850 events. 885/1850 cut-off events. For 468/540 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13169 event pairs, 453 based on Foata normal form. 7/1701 useless extension candidates. Maximal degree in co-relation 3698. Up to 1138 conditions per place. [2024-05-12 13:10:04,562 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 32 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-05-12 13:10:04,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 256 flow [2024-05-12 13:10:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:10:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:10:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-05-12 13:10:04,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7430555555555556 [2024-05-12 13:10:04,564 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 177 flow. Second operand 3 states and 107 transitions. [2024-05-12 13:10:04,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 256 flow [2024-05-12 13:10:04,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 242 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:04,566 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 152 flow [2024-05-12 13:10:04,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-05-12 13:10:04,567 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-05-12 13:10:04,567 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 152 flow [2024-05-12 13:10:04,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:04,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:04,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:04,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:10:04,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:04,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -966992218, now seen corresponding path program 1 times [2024-05-12 13:10:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:04,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327039784] [2024-05-12 13:10:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:04,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:05,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:05,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327039784] [2024-05-12 13:10:05,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327039784] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:05,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:05,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:10:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619332120] [2024-05-12 13:10:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:05,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:10:05,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:10:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:10:05,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-05-12 13:10:05,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:05,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:05,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-05-12 13:10:05,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:06,308 INFO L124 PetriNetUnfolderBase]: 2555/3980 cut-off events. [2024-05-12 13:10:06,308 INFO L125 PetriNetUnfolderBase]: For 2219/2219 co-relation queries the response was YES. [2024-05-12 13:10:06,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9521 conditions, 3980 events. 2555/3980 cut-off events. For 2219/2219 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 23034 event pairs, 783 based on Foata normal form. 6/3951 useless extension candidates. Maximal degree in co-relation 9504. Up to 3607 conditions per place. [2024-05-12 13:10:06,330 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 66 selfloop transitions, 12 changer transitions 5/95 dead transitions. [2024-05-12 13:10:06,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 436 flow [2024-05-12 13:10:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 13:10:06,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-05-12 13:10:06,334 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 152 flow. Second operand 6 states and 176 transitions. [2024-05-12 13:10:06,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 436 flow [2024-05-12 13:10:06,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 95 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:06,337 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 199 flow [2024-05-12 13:10:06,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-05-12 13:10:06,339 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-05-12 13:10:06,339 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 199 flow [2024-05-12 13:10:06,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:06,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:06,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:06,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:10:06,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:06,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1058940042, now seen corresponding path program 1 times [2024-05-12 13:10:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:06,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924095969] [2024-05-12 13:10:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:07,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:07,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924095969] [2024-05-12 13:10:07,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924095969] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:07,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:07,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:10:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62322195] [2024-05-12 13:10:07,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:07,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:10:07,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:10:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:10:07,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-05-12 13:10:07,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:07,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:07,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-05-12 13:10:07,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:07,695 INFO L124 PetriNetUnfolderBase]: 2125/3797 cut-off events. [2024-05-12 13:10:07,695 INFO L125 PetriNetUnfolderBase]: For 2854/2854 co-relation queries the response was YES. [2024-05-12 13:10:07,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9094 conditions, 3797 events. 2125/3797 cut-off events. For 2854/2854 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24639 event pairs, 937 based on Foata normal form. 2/3665 useless extension candidates. Maximal degree in co-relation 9075. Up to 3081 conditions per place. [2024-05-12 13:10:07,712 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 55 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-05-12 13:10:07,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 404 flow [2024-05-12 13:10:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:10:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:10:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-05-12 13:10:07,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-05-12 13:10:07,713 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 199 flow. Second operand 5 states and 130 transitions. [2024-05-12 13:10:07,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 404 flow [2024-05-12 13:10:07,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 371 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:07,716 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 248 flow [2024-05-12 13:10:07,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-05-12 13:10:07,717 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-05-12 13:10:07,717 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 248 flow [2024-05-12 13:10:07,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:07,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:07,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:07,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:10:07,718 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:07,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1585108059, now seen corresponding path program 1 times [2024-05-12 13:10:07,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:07,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022247128] [2024-05-12 13:10:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:07,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:08,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022247128] [2024-05-12 13:10:08,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022247128] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:08,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:08,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:08,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771746217] [2024-05-12 13:10:08,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:08,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:08,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:08,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:08,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:08,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:08,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:08,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:08,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:08,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:09,134 INFO L124 PetriNetUnfolderBase]: 2601/4444 cut-off events. [2024-05-12 13:10:09,135 INFO L125 PetriNetUnfolderBase]: For 4959/4959 co-relation queries the response was YES. [2024-05-12 13:10:09,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11617 conditions, 4444 events. 2601/4444 cut-off events. For 4959/4959 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 28230 event pairs, 1118 based on Foata normal form. 4/4319 useless extension candidates. Maximal degree in co-relation 11595. Up to 3714 conditions per place. [2024-05-12 13:10:09,153 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 69 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-05-12 13:10:09,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 517 flow [2024-05-12 13:10:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-05-12 13:10:09,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-05-12 13:10:09,155 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 248 flow. Second operand 6 states and 154 transitions. [2024-05-12 13:10:09,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 517 flow [2024-05-12 13:10:09,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 500 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:09,158 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 321 flow [2024-05-12 13:10:09,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-05-12 13:10:09,159 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-05-12 13:10:09,159 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 321 flow [2024-05-12 13:10:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:09,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:09,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:09,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:10:09,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:09,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1290961069, now seen corresponding path program 2 times [2024-05-12 13:10:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:09,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882899195] [2024-05-12 13:10:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:09,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:09,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882899195] [2024-05-12 13:10:09,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882899195] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:09,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:09,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:09,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330016280] [2024-05-12 13:10:09,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:09,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:09,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:09,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:09,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 321 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:09,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:09,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:09,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:10,513 INFO L124 PetriNetUnfolderBase]: 2624/4473 cut-off events. [2024-05-12 13:10:10,514 INFO L125 PetriNetUnfolderBase]: For 7557/7569 co-relation queries the response was YES. [2024-05-12 13:10:10,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12718 conditions, 4473 events. 2624/4473 cut-off events. For 7557/7569 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 28195 event pairs, 1067 based on Foata normal form. 12/4354 useless extension candidates. Maximal degree in co-relation 12693. Up to 3697 conditions per place. [2024-05-12 13:10:10,536 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 67 selfloop transitions, 18 changer transitions 0/96 dead transitions. [2024-05-12 13:10:10,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 589 flow [2024-05-12 13:10:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-05-12 13:10:10,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2024-05-12 13:10:10,538 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 321 flow. Second operand 6 states and 155 transitions. [2024-05-12 13:10:10,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 589 flow [2024-05-12 13:10:10,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 558 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:10,545 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 364 flow [2024-05-12 13:10:10,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-05-12 13:10:10,546 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2024-05-12 13:10:10,546 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 364 flow [2024-05-12 13:10:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:10,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:10,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:10:10,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:10,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1290952141, now seen corresponding path program 1 times [2024-05-12 13:10:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:10,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397599353] [2024-05-12 13:10:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:11,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:11,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397599353] [2024-05-12 13:10:11,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397599353] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:11,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:11,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:11,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300841456] [2024-05-12 13:10:11,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:11,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:11,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:11,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:11,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:11,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:11,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:11,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:11,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:12,245 INFO L124 PetriNetUnfolderBase]: 2729/4755 cut-off events. [2024-05-12 13:10:12,246 INFO L125 PetriNetUnfolderBase]: For 10213/10213 co-relation queries the response was YES. [2024-05-12 13:10:12,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14077 conditions, 4755 events. 2729/4755 cut-off events. For 10213/10213 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30941 event pairs, 1097 based on Foata normal form. 2/4595 useless extension candidates. Maximal degree in co-relation 14051. Up to 3900 conditions per place. [2024-05-12 13:10:12,267 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 82 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-05-12 13:10:12,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 683 flow [2024-05-12 13:10:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:10:12,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-05-12 13:10:12,269 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 364 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:10:12,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 683 flow [2024-05-12 13:10:12,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 630 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:12,274 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 398 flow [2024-05-12 13:10:12,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2024-05-12 13:10:12,275 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-05-12 13:10:12,275 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 398 flow [2024-05-12 13:10:12,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:12,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:12,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:12,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:10:12,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:12,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1543261893, now seen corresponding path program 1 times [2024-05-12 13:10:12,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:12,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181988636] [2024-05-12 13:10:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:12,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:13,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181988636] [2024-05-12 13:10:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181988636] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:13,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611996069] [2024-05-12 13:10:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:13,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:13,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:13,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:13,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 398 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:13,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:13,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:13,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:14,246 INFO L124 PetriNetUnfolderBase]: 3128/5094 cut-off events. [2024-05-12 13:10:14,246 INFO L125 PetriNetUnfolderBase]: For 13968/13968 co-relation queries the response was YES. [2024-05-12 13:10:14,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16607 conditions, 5094 events. 3128/5094 cut-off events. For 13968/13968 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 31444 event pairs, 1303 based on Foata normal form. 2/5007 useless extension candidates. Maximal degree in co-relation 16579. Up to 4438 conditions per place. [2024-05-12 13:10:14,275 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 85 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-05-12 13:10:14,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 123 transitions, 819 flow [2024-05-12 13:10:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-05-12 13:10:14,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-05-12 13:10:14,277 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 398 flow. Second operand 8 states and 194 transitions. [2024-05-12 13:10:14,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 123 transitions, 819 flow [2024-05-12 13:10:14,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 123 transitions, 777 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:14,284 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 579 flow [2024-05-12 13:10:14,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-05-12 13:10:14,285 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-05-12 13:10:14,285 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 579 flow [2024-05-12 13:10:14,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:14,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:14,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:14,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:10:14,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:14,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:14,286 INFO L85 PathProgramCache]: Analyzing trace with hash 304356091, now seen corresponding path program 2 times [2024-05-12 13:10:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:14,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308179460] [2024-05-12 13:10:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:14,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:15,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:15,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308179460] [2024-05-12 13:10:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308179460] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:15,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879017685] [2024-05-12 13:10:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:15,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:15,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:15,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:15,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:15,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:15,978 INFO L124 PetriNetUnfolderBase]: 3260/5373 cut-off events. [2024-05-12 13:10:15,978 INFO L125 PetriNetUnfolderBase]: For 20403/20409 co-relation queries the response was YES. [2024-05-12 13:10:15,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19080 conditions, 5373 events. 3260/5373 cut-off events. For 20403/20409 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33562 event pairs, 1142 based on Foata normal form. 6/5273 useless extension candidates. Maximal degree in co-relation 19048. Up to 4612 conditions per place. [2024-05-12 13:10:16,010 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 97 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-05-12 13:10:16,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 146 transitions, 1103 flow [2024-05-12 13:10:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:10:16,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286458333333334 [2024-05-12 13:10:16,012 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 579 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:10:16,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 146 transitions, 1103 flow [2024-05-12 13:10:16,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1041 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-05-12 13:10:16,025 INFO L231 Difference]: Finished difference. Result has 90 places, 110 transitions, 807 flow [2024-05-12 13:10:16,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=807, PETRI_PLACES=90, PETRI_TRANSITIONS=110} [2024-05-12 13:10:16,026 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 36 predicate places. [2024-05-12 13:10:16,026 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 110 transitions, 807 flow [2024-05-12 13:10:16,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:16,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:16,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:16,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:10:16,027 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:16,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1970414739, now seen corresponding path program 3 times [2024-05-12 13:10:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:16,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879164418] [2024-05-12 13:10:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:16,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:16,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879164418] [2024-05-12 13:10:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879164418] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:16,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:16,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969691456] [2024-05-12 13:10:16,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:16,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:17,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:17,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 110 transitions, 807 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:17,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:17,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:17,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:17,970 INFO L124 PetriNetUnfolderBase]: 3351/5719 cut-off events. [2024-05-12 13:10:17,970 INFO L125 PetriNetUnfolderBase]: For 27166/27172 co-relation queries the response was YES. [2024-05-12 13:10:17,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21360 conditions, 5719 events. 3351/5719 cut-off events. For 27166/27172 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 36915 event pairs, 1108 based on Foata normal form. 6/5554 useless extension candidates. Maximal degree in co-relation 21323. Up to 4665 conditions per place. [2024-05-12 13:10:18,012 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 109 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-05-12 13:10:18,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 182 transitions, 1573 flow [2024-05-12 13:10:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 13:10:18,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5442708333333334 [2024-05-12 13:10:18,014 INFO L175 Difference]: Start difference. First operand has 90 places, 110 transitions, 807 flow. Second operand 8 states and 209 transitions. [2024-05-12 13:10:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 182 transitions, 1573 flow [2024-05-12 13:10:18,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 182 transitions, 1451 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:18,033 INFO L231 Difference]: Finished difference. Result has 95 places, 137 transitions, 1148 flow [2024-05-12 13:10:18,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1148, PETRI_PLACES=95, PETRI_TRANSITIONS=137} [2024-05-12 13:10:18,034 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2024-05-12 13:10:18,034 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 137 transitions, 1148 flow [2024-05-12 13:10:18,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:18,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:18,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:18,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:10:18,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:18,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1364809866, now seen corresponding path program 1 times [2024-05-12 13:10:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:18,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935428825] [2024-05-12 13:10:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:19,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:19,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935428825] [2024-05-12 13:10:19,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935428825] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:19,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:19,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:19,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901936502] [2024-05-12 13:10:19,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:19,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:19,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 137 transitions, 1148 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:19,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:19,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:19,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:19,886 INFO L124 PetriNetUnfolderBase]: 3081/5171 cut-off events. [2024-05-12 13:10:19,886 INFO L125 PetriNetUnfolderBase]: For 27968/27968 co-relation queries the response was YES. [2024-05-12 13:10:19,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20345 conditions, 5171 events. 3081/5171 cut-off events. For 27968/27968 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32409 event pairs, 1022 based on Foata normal form. 4/5058 useless extension candidates. Maximal degree in co-relation 20306. Up to 4352 conditions per place. [2024-05-12 13:10:20,001 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 151 selfloop transitions, 18 changer transitions 0/180 dead transitions. [2024-05-12 13:10:20,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 180 transitions, 1682 flow [2024-05-12 13:10:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-05-12 13:10:20,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-05-12 13:10:20,002 INFO L175 Difference]: Start difference. First operand has 95 places, 137 transitions, 1148 flow. Second operand 8 states and 201 transitions. [2024-05-12 13:10:20,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 180 transitions, 1682 flow [2024-05-12 13:10:20,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 180 transitions, 1550 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:20,023 INFO L231 Difference]: Finished difference. Result has 98 places, 139 transitions, 1093 flow [2024-05-12 13:10:20,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1093, PETRI_PLACES=98, PETRI_TRANSITIONS=139} [2024-05-12 13:10:20,023 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2024-05-12 13:10:20,023 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 139 transitions, 1093 flow [2024-05-12 13:10:20,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:20,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:20,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:20,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:10:20,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:20,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1637139892, now seen corresponding path program 1 times [2024-05-12 13:10:20,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:20,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759637879] [2024-05-12 13:10:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:20,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:20,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:20,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759637879] [2024-05-12 13:10:20,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759637879] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:20,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:10:20,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949037842] [2024-05-12 13:10:20,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:20,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:10:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:10:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:10:20,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:20,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 139 transitions, 1093 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:20,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:20,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:20,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:21,555 INFO L124 PetriNetUnfolderBase]: 3601/5835 cut-off events. [2024-05-12 13:10:21,555 INFO L125 PetriNetUnfolderBase]: For 34028/34028 co-relation queries the response was YES. [2024-05-12 13:10:21,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23211 conditions, 5835 events. 3601/5835 cut-off events. For 34028/34028 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35701 event pairs, 1315 based on Foata normal form. 1/5724 useless extension candidates. Maximal degree in co-relation 23171. Up to 5151 conditions per place. [2024-05-12 13:10:21,590 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 134 selfloop transitions, 12 changer transitions 0/156 dead transitions. [2024-05-12 13:10:21,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1457 flow [2024-05-12 13:10:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:10:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:10:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-05-12 13:10:21,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-05-12 13:10:21,592 INFO L175 Difference]: Start difference. First operand has 98 places, 139 transitions, 1093 flow. Second operand 5 states and 119 transitions. [2024-05-12 13:10:21,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1457 flow [2024-05-12 13:10:21,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 156 transitions, 1398 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:21,619 INFO L231 Difference]: Finished difference. Result has 97 places, 142 transitions, 1091 flow [2024-05-12 13:10:21,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1091, PETRI_PLACES=97, PETRI_TRANSITIONS=142} [2024-05-12 13:10:21,620 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-05-12 13:10:21,620 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 142 transitions, 1091 flow [2024-05-12 13:10:21,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:21,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:21,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:21,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:10:21,621 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:21,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:21,621 INFO L85 PathProgramCache]: Analyzing trace with hash -592722990, now seen corresponding path program 1 times [2024-05-12 13:10:21,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:21,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124868385] [2024-05-12 13:10:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:22,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:22,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124868385] [2024-05-12 13:10:22,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124868385] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:22,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:22,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:22,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256254367] [2024-05-12 13:10:22,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:22,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:22,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:22,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:22,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:22,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 142 transitions, 1091 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:22,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:22,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:22,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:23,730 INFO L124 PetriNetUnfolderBase]: 3850/6140 cut-off events. [2024-05-12 13:10:23,731 INFO L125 PetriNetUnfolderBase]: For 41360/41366 co-relation queries the response was YES. [2024-05-12 13:10:23,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25490 conditions, 6140 events. 3850/6140 cut-off events. For 41360/41366 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 37258 event pairs, 1251 based on Foata normal form. 8/6025 useless extension candidates. Maximal degree in co-relation 25449. Up to 5315 conditions per place. [2024-05-12 13:10:23,772 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 150 selfloop transitions, 30 changer transitions 0/191 dead transitions. [2024-05-12 13:10:23,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 191 transitions, 1675 flow [2024-05-12 13:10:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:10:23,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-05-12 13:10:23,774 INFO L175 Difference]: Start difference. First operand has 97 places, 142 transitions, 1091 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:10:23,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 191 transitions, 1675 flow [2024-05-12 13:10:23,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 191 transitions, 1642 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:23,804 INFO L231 Difference]: Finished difference. Result has 103 places, 149 transitions, 1201 flow [2024-05-12 13:10:23,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1201, PETRI_PLACES=103, PETRI_TRANSITIONS=149} [2024-05-12 13:10:23,806 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-05-12 13:10:23,806 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 149 transitions, 1201 flow [2024-05-12 13:10:23,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:23,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:23,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:23,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:10:23,821 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:23,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash 631986194, now seen corresponding path program 2 times [2024-05-12 13:10:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:23,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354879231] [2024-05-12 13:10:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:23,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:24,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:24,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354879231] [2024-05-12 13:10:24,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354879231] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:24,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390870543] [2024-05-12 13:10:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:24,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:24,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 149 transitions, 1201 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:24,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:24,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:24,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:25,710 INFO L124 PetriNetUnfolderBase]: 3914/6199 cut-off events. [2024-05-12 13:10:25,710 INFO L125 PetriNetUnfolderBase]: For 49309/49324 co-relation queries the response was YES. [2024-05-12 13:10:25,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27580 conditions, 6199 events. 3914/6199 cut-off events. For 49309/49324 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 37177 event pairs, 1191 based on Foata normal form. 12/6090 useless extension candidates. Maximal degree in co-relation 27537. Up to 5262 conditions per place. [2024-05-12 13:10:25,752 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 150 selfloop transitions, 39 changer transitions 0/200 dead transitions. [2024-05-12 13:10:25,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 200 transitions, 1833 flow [2024-05-12 13:10:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:10:25,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-05-12 13:10:25,754 INFO L175 Difference]: Start difference. First operand has 103 places, 149 transitions, 1201 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:10:25,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 200 transitions, 1833 flow [2024-05-12 13:10:25,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 200 transitions, 1740 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:25,790 INFO L231 Difference]: Finished difference. Result has 107 places, 157 transitions, 1283 flow [2024-05-12 13:10:25,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1283, PETRI_PLACES=107, PETRI_TRANSITIONS=157} [2024-05-12 13:10:25,790 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2024-05-12 13:10:25,790 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 157 transitions, 1283 flow [2024-05-12 13:10:25,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:25,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:25,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:25,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:10:25,791 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:25,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash 640260404, now seen corresponding path program 3 times [2024-05-12 13:10:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:25,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010426332] [2024-05-12 13:10:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:25,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:26,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:26,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010426332] [2024-05-12 13:10:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010426332] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:26,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:26,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804947518] [2024-05-12 13:10:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:26,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:26,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:26,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:26,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 157 transitions, 1283 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:26,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:26,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:26,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:27,877 INFO L124 PetriNetUnfolderBase]: 3960/6270 cut-off events. [2024-05-12 13:10:27,877 INFO L125 PetriNetUnfolderBase]: For 57629/57644 co-relation queries the response was YES. [2024-05-12 13:10:27,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29500 conditions, 6270 events. 3960/6270 cut-off events. For 57629/57644 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 37697 event pairs, 1180 based on Foata normal form. 12/6156 useless extension candidates. Maximal degree in co-relation 29455. Up to 5326 conditions per place. [2024-05-12 13:10:27,914 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 153 selfloop transitions, 42 changer transitions 0/206 dead transitions. [2024-05-12 13:10:27,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 206 transitions, 1937 flow [2024-05-12 13:10:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-05-12 13:10:27,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-05-12 13:10:27,916 INFO L175 Difference]: Start difference. First operand has 107 places, 157 transitions, 1283 flow. Second operand 8 states and 201 transitions. [2024-05-12 13:10:27,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 206 transitions, 1937 flow [2024-05-12 13:10:27,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 206 transitions, 1812 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:27,951 INFO L231 Difference]: Finished difference. Result has 110 places, 163 transitions, 1335 flow [2024-05-12 13:10:27,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1335, PETRI_PLACES=110, PETRI_TRANSITIONS=163} [2024-05-12 13:10:27,952 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-05-12 13:10:27,952 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 163 transitions, 1335 flow [2024-05-12 13:10:27,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:27,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:27,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:27,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:10:27,953 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:27,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:27,953 INFO L85 PathProgramCache]: Analyzing trace with hash 640557074, now seen corresponding path program 4 times [2024-05-12 13:10:27,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:27,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423085203] [2024-05-12 13:10:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:27,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423085203] [2024-05-12 13:10:28,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423085203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:28,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190037723] [2024-05-12 13:10:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:28,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:28,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:28,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 163 transitions, 1335 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:28,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:28,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:28,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:29,880 INFO L124 PetriNetUnfolderBase]: 3929/6025 cut-off events. [2024-05-12 13:10:29,880 INFO L125 PetriNetUnfolderBase]: For 63300/63315 co-relation queries the response was YES. [2024-05-12 13:10:29,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30015 conditions, 6025 events. 3929/6025 cut-off events. For 63300/63315 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 34554 event pairs, 1115 based on Foata normal form. 10/5982 useless extension candidates. Maximal degree in co-relation 29969. Up to 5299 conditions per place. [2024-05-12 13:10:29,920 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 166 selfloop transitions, 58 changer transitions 0/235 dead transitions. [2024-05-12 13:10:29,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 235 transitions, 2316 flow [2024-05-12 13:10:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:10:29,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-05-12 13:10:29,921 INFO L175 Difference]: Start difference. First operand has 110 places, 163 transitions, 1335 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:10:29,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 235 transitions, 2316 flow [2024-05-12 13:10:29,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 235 transitions, 2152 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:29,959 INFO L231 Difference]: Finished difference. Result has 117 places, 192 transitions, 1734 flow [2024-05-12 13:10:29,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1734, PETRI_PLACES=117, PETRI_TRANSITIONS=192} [2024-05-12 13:10:29,959 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2024-05-12 13:10:29,960 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 192 transitions, 1734 flow [2024-05-12 13:10:29,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:29,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:29,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:29,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:10:29,960 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:29,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:29,961 INFO L85 PathProgramCache]: Analyzing trace with hash 788272375, now seen corresponding path program 1 times [2024-05-12 13:10:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:29,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262914625] [2024-05-12 13:10:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:30,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:30,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262914625] [2024-05-12 13:10:30,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262914625] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:30,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:30,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:30,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073177455] [2024-05-12 13:10:30,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:30,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:30,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:30,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:30,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 192 transitions, 1734 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-05-12 13:10:30,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:30,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:30,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:31,559 INFO L124 PetriNetUnfolderBase]: 3779/5990 cut-off events. [2024-05-12 13:10:31,559 INFO L125 PetriNetUnfolderBase]: For 65309/65309 co-relation queries the response was YES. [2024-05-12 13:10:31,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30392 conditions, 5990 events. 3779/5990 cut-off events. For 65309/65309 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35773 event pairs, 1235 based on Foata normal form. 2/5906 useless extension candidates. Maximal degree in co-relation 30342. Up to 5377 conditions per place. [2024-05-12 13:10:31,602 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 190 selfloop transitions, 15 changer transitions 0/215 dead transitions. [2024-05-12 13:10:31,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 215 transitions, 2246 flow [2024-05-12 13:10:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-05-12 13:10:31,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-05-12 13:10:31,604 INFO L175 Difference]: Start difference. First operand has 117 places, 192 transitions, 1734 flow. Second operand 6 states and 141 transitions. [2024-05-12 13:10:31,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 215 transitions, 2246 flow [2024-05-12 13:10:31,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 215 transitions, 2078 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:31,727 INFO L231 Difference]: Finished difference. Result has 120 places, 195 transitions, 1634 flow [2024-05-12 13:10:31,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1634, PETRI_PLACES=120, PETRI_TRANSITIONS=195} [2024-05-12 13:10:31,728 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-05-12 13:10:31,728 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 195 transitions, 1634 flow [2024-05-12 13:10:31,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-05-12 13:10:31,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:31,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:31,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:10:31,729 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:31,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1206430560, now seen corresponding path program 1 times [2024-05-12 13:10:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346234634] [2024-05-12 13:10:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:31,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:32,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:32,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346234634] [2024-05-12 13:10:32,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346234634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:32,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:32,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:32,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480447764] [2024-05-12 13:10:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:32,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:32,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:32,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 195 transitions, 1634 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:32,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:32,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:32,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:34,052 INFO L124 PetriNetUnfolderBase]: 3738/6043 cut-off events. [2024-05-12 13:10:34,052 INFO L125 PetriNetUnfolderBase]: For 74086/74112 co-relation queries the response was YES. [2024-05-12 13:10:34,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31282 conditions, 6043 events. 3738/6043 cut-off events. For 74086/74112 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37826 event pairs, 1076 based on Foata normal form. 24/5941 useless extension candidates. Maximal degree in co-relation 31231. Up to 5045 conditions per place. [2024-05-12 13:10:34,100 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 159 selfloop transitions, 69 changer transitions 0/246 dead transitions. [2024-05-12 13:10:34,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 246 transitions, 2357 flow [2024-05-12 13:10:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:10:34,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-05-12 13:10:34,101 INFO L175 Difference]: Start difference. First operand has 120 places, 195 transitions, 1634 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:10:34,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 246 transitions, 2357 flow [2024-05-12 13:10:34,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 246 transitions, 2311 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:34,166 INFO L231 Difference]: Finished difference. Result has 126 places, 205 transitions, 1930 flow [2024-05-12 13:10:34,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1930, PETRI_PLACES=126, PETRI_TRANSITIONS=205} [2024-05-12 13:10:34,167 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-05-12 13:10:34,167 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 205 transitions, 1930 flow [2024-05-12 13:10:34,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:34,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:34,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:10:34,167 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:34,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1313829766, now seen corresponding path program 2 times [2024-05-12 13:10:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951820388] [2024-05-12 13:10:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:34,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:35,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:35,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951820388] [2024-05-12 13:10:35,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951820388] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:35,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:35,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:35,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599244780] [2024-05-12 13:10:35,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:35,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:35,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:35,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:35,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 205 transitions, 1930 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:35,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:35,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:35,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:36,122 INFO L124 PetriNetUnfolderBase]: 3754/6077 cut-off events. [2024-05-12 13:10:36,122 INFO L125 PetriNetUnfolderBase]: For 83390/83416 co-relation queries the response was YES. [2024-05-12 13:10:36,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32759 conditions, 6077 events. 3754/6077 cut-off events. For 83390/83416 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 38058 event pairs, 880 based on Foata normal form. 24/5975 useless extension candidates. Maximal degree in co-relation 32705. Up to 5121 conditions per place. [2024-05-12 13:10:36,169 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 181 selfloop transitions, 51 changer transitions 0/250 dead transitions. [2024-05-12 13:10:36,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 250 transitions, 2612 flow [2024-05-12 13:10:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:10:36,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-05-12 13:10:36,172 INFO L175 Difference]: Start difference. First operand has 126 places, 205 transitions, 1930 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:10:36,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 250 transitions, 2612 flow [2024-05-12 13:10:36,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 250 transitions, 2487 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:36,246 INFO L231 Difference]: Finished difference. Result has 131 places, 210 transitions, 2009 flow [2024-05-12 13:10:36,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2009, PETRI_PLACES=131, PETRI_TRANSITIONS=210} [2024-05-12 13:10:36,246 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-05-12 13:10:36,247 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 210 transitions, 2009 flow [2024-05-12 13:10:36,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:36,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:36,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:36,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:10:36,247 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:36,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1211792940, now seen corresponding path program 3 times [2024-05-12 13:10:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:36,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109016273] [2024-05-12 13:10:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:36,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:37,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:37,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109016273] [2024-05-12 13:10:37,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109016273] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:37,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:37,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:37,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442391144] [2024-05-12 13:10:37,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:37,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:37,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:37,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:37,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:37,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 210 transitions, 2009 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:37,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:37,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:37,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:38,261 INFO L124 PetriNetUnfolderBase]: 3785/6123 cut-off events. [2024-05-12 13:10:38,261 INFO L125 PetriNetUnfolderBase]: For 93809/93834 co-relation queries the response was YES. [2024-05-12 13:10:38,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33622 conditions, 6123 events. 3785/6123 cut-off events. For 93809/93834 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 38424 event pairs, 1106 based on Foata normal form. 24/6019 useless extension candidates. Maximal degree in co-relation 33566. Up to 5239 conditions per place. [2024-05-12 13:10:38,314 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 205 selfloop transitions, 32 changer transitions 0/255 dead transitions. [2024-05-12 13:10:38,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 255 transitions, 2715 flow [2024-05-12 13:10:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:10:38,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286458333333334 [2024-05-12 13:10:38,316 INFO L175 Difference]: Start difference. First operand has 131 places, 210 transitions, 2009 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:10:38,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 255 transitions, 2715 flow [2024-05-12 13:10:38,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 255 transitions, 2571 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:38,415 INFO L231 Difference]: Finished difference. Result has 135 places, 214 transitions, 2019 flow [2024-05-12 13:10:38,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2019, PETRI_PLACES=135, PETRI_TRANSITIONS=214} [2024-05-12 13:10:38,416 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2024-05-12 13:10:38,416 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 214 transitions, 2019 flow [2024-05-12 13:10:38,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:38,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:38,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:38,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:10:38,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:38,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash -363836592, now seen corresponding path program 1 times [2024-05-12 13:10:38,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:38,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299837105] [2024-05-12 13:10:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299837105] [2024-05-12 13:10:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299837105] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:39,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:39,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928324924] [2024-05-12 13:10:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:39,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:39,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:39,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 214 transitions, 2019 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:39,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:39,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:39,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:40,836 INFO L124 PetriNetUnfolderBase]: 4249/6730 cut-off events. [2024-05-12 13:10:40,836 INFO L125 PetriNetUnfolderBase]: For 104423/104433 co-relation queries the response was YES. [2024-05-12 13:10:40,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36751 conditions, 6730 events. 4249/6730 cut-off events. For 104423/104433 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 41231 event pairs, 1161 based on Foata normal form. 10/6612 useless extension candidates. Maximal degree in co-relation 36693. Up to 5685 conditions per place. [2024-05-12 13:10:40,893 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 179 selfloop transitions, 101 changer transitions 0/291 dead transitions. [2024-05-12 13:10:40,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 291 transitions, 3196 flow [2024-05-12 13:10:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-05-12 13:10:40,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-05-12 13:10:40,894 INFO L175 Difference]: Start difference. First operand has 135 places, 214 transitions, 2019 flow. Second operand 10 states and 239 transitions. [2024-05-12 13:10:40,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 291 transitions, 3196 flow [2024-05-12 13:10:41,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 291 transitions, 3095 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:41,004 INFO L231 Difference]: Finished difference. Result has 144 places, 242 transitions, 2641 flow [2024-05-12 13:10:41,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2641, PETRI_PLACES=144, PETRI_TRANSITIONS=242} [2024-05-12 13:10:41,004 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2024-05-12 13:10:41,005 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 242 transitions, 2641 flow [2024-05-12 13:10:41,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:41,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:41,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:41,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:10:41,005 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:41,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1194542944, now seen corresponding path program 2 times [2024-05-12 13:10:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:41,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750933664] [2024-05-12 13:10:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:41,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:41,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:41,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750933664] [2024-05-12 13:10:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750933664] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:41,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:41,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531271147] [2024-05-12 13:10:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:41,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:41,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:42,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:42,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 242 transitions, 2641 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:42,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:42,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:42,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:43,216 INFO L124 PetriNetUnfolderBase]: 4302/6794 cut-off events. [2024-05-12 13:10:43,216 INFO L125 PetriNetUnfolderBase]: For 115904/115908 co-relation queries the response was YES. [2024-05-12 13:10:43,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38911 conditions, 6794 events. 4302/6794 cut-off events. For 115904/115908 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 41541 event pairs, 1141 based on Foata normal form. 6/6674 useless extension candidates. Maximal degree in co-relation 38849. Up to 5586 conditions per place. [2024-05-12 13:10:43,275 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 170 selfloop transitions, 132 changer transitions 0/313 dead transitions. [2024-05-12 13:10:43,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 313 transitions, 3868 flow [2024-05-12 13:10:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-05-12 13:10:43,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-05-12 13:10:43,276 INFO L175 Difference]: Start difference. First operand has 144 places, 242 transitions, 2641 flow. Second operand 9 states and 226 transitions. [2024-05-12 13:10:43,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 313 transitions, 3868 flow [2024-05-12 13:10:43,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 313 transitions, 3627 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:43,495 INFO L231 Difference]: Finished difference. Result has 152 places, 261 transitions, 3215 flow [2024-05-12 13:10:43,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3215, PETRI_PLACES=152, PETRI_TRANSITIONS=261} [2024-05-12 13:10:43,496 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-05-12 13:10:43,496 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 261 transitions, 3215 flow [2024-05-12 13:10:43,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:43,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:43,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:10:43,496 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:43,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1425923967, now seen corresponding path program 1 times [2024-05-12 13:10:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:43,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652991046] [2024-05-12 13:10:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:44,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:44,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652991046] [2024-05-12 13:10:44,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652991046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:44,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:44,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:44,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209873109] [2024-05-12 13:10:44,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:44,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:44,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:44,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:44,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 261 transitions, 3215 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:44,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:44,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:44,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:45,950 INFO L124 PetriNetUnfolderBase]: 4520/7172 cut-off events. [2024-05-12 13:10:45,950 INFO L125 PetriNetUnfolderBase]: For 146605/146615 co-relation queries the response was YES. [2024-05-12 13:10:45,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43372 conditions, 7172 events. 4520/7172 cut-off events. For 146605/146615 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 44513 event pairs, 1226 based on Foata normal form. 28/7059 useless extension candidates. Maximal degree in co-relation 43305. Up to 6036 conditions per place. [2024-05-12 13:10:46,003 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 267 selfloop transitions, 39 changer transitions 0/317 dead transitions. [2024-05-12 13:10:46,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 317 transitions, 4131 flow [2024-05-12 13:10:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:10:46,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-05-12 13:10:46,005 INFO L175 Difference]: Start difference. First operand has 152 places, 261 transitions, 3215 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:10:46,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 317 transitions, 4131 flow [2024-05-12 13:10:46,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 317 transitions, 3811 flow, removed 134 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:46,254 INFO L231 Difference]: Finished difference. Result has 158 places, 264 transitions, 3048 flow [2024-05-12 13:10:46,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3048, PETRI_PLACES=158, PETRI_TRANSITIONS=264} [2024-05-12 13:10:46,254 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 104 predicate places. [2024-05-12 13:10:46,254 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 264 transitions, 3048 flow [2024-05-12 13:10:46,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:46,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:46,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:46,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:10:46,255 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:46,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1733632505, now seen corresponding path program 1 times [2024-05-12 13:10:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:46,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470134457] [2024-05-12 13:10:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:46,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:46,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470134457] [2024-05-12 13:10:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470134457] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:46,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:46,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:46,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072239988] [2024-05-12 13:10:46,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:46,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:46,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:46,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:10:46,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 264 transitions, 3048 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:46,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:46,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:10:46,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:48,113 INFO L124 PetriNetUnfolderBase]: 4860/7636 cut-off events. [2024-05-12 13:10:48,113 INFO L125 PetriNetUnfolderBase]: For 143316/143316 co-relation queries the response was YES. [2024-05-12 13:10:48,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44946 conditions, 7636 events. 4860/7636 cut-off events. For 143316/143316 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 47070 event pairs, 1392 based on Foata normal form. 2/7489 useless extension candidates. Maximal degree in co-relation 44877. Up to 6763 conditions per place. [2024-05-12 13:10:48,174 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 234 selfloop transitions, 55 changer transitions 0/298 dead transitions. [2024-05-12 13:10:48,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 298 transitions, 3882 flow [2024-05-12 13:10:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-05-12 13:10:48,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-05-12 13:10:48,175 INFO L175 Difference]: Start difference. First operand has 158 places, 264 transitions, 3048 flow. Second operand 6 states and 146 transitions. [2024-05-12 13:10:48,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 298 transitions, 3882 flow [2024-05-12 13:10:48,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 298 transitions, 3799 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:48,296 INFO L231 Difference]: Finished difference. Result has 157 places, 270 transitions, 3176 flow [2024-05-12 13:10:48,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3176, PETRI_PLACES=157, PETRI_TRANSITIONS=270} [2024-05-12 13:10:48,297 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2024-05-12 13:10:48,297 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 270 transitions, 3176 flow [2024-05-12 13:10:48,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:48,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:48,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:48,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:10:48,298 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:48,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1405137704, now seen corresponding path program 4 times [2024-05-12 13:10:48,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:48,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641130960] [2024-05-12 13:10:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:49,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:49,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641130960] [2024-05-12 13:10:49,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641130960] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:49,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:49,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578278734] [2024-05-12 13:10:49,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:49,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:49,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:10:49,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 270 transitions, 3176 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:49,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:49,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:10:49,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:50,754 INFO L124 PetriNetUnfolderBase]: 4246/6779 cut-off events. [2024-05-12 13:10:50,755 INFO L125 PetriNetUnfolderBase]: For 146309/146350 co-relation queries the response was YES. [2024-05-12 13:10:50,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42430 conditions, 6779 events. 4246/6779 cut-off events. For 146309/146350 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42456 event pairs, 1037 based on Foata normal form. 22/6661 useless extension candidates. Maximal degree in co-relation 42360. Up to 5724 conditions per place. [2024-05-12 13:10:50,822 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 244 selfloop transitions, 48 changer transitions 0/315 dead transitions. [2024-05-12 13:10:50,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 315 transitions, 4014 flow [2024-05-12 13:10:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:10:50,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-05-12 13:10:50,824 INFO L175 Difference]: Start difference. First operand has 157 places, 270 transitions, 3176 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:10:50,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 315 transitions, 4014 flow [2024-05-12 13:10:50,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 315 transitions, 3977 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:50,994 INFO L231 Difference]: Finished difference. Result has 164 places, 274 transitions, 3341 flow [2024-05-12 13:10:50,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3341, PETRI_PLACES=164, PETRI_TRANSITIONS=274} [2024-05-12 13:10:50,995 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2024-05-12 13:10:50,995 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 274 transitions, 3341 flow [2024-05-12 13:10:50,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:50,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:50,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:50,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:10:50,996 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:50,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1883263625, now seen corresponding path program 2 times [2024-05-12 13:10:50,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:50,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373822336] [2024-05-12 13:10:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:51,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373822336] [2024-05-12 13:10:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373822336] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:51,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:51,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140885469] [2024-05-12 13:10:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:51,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:52,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:52,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 274 transitions, 3341 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:52,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:52,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:52,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:53,339 INFO L124 PetriNetUnfolderBase]: 4577/7082 cut-off events. [2024-05-12 13:10:53,339 INFO L125 PetriNetUnfolderBase]: For 155309/155336 co-relation queries the response was YES. [2024-05-12 13:10:53,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44685 conditions, 7082 events. 4577/7082 cut-off events. For 155309/155336 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42504 event pairs, 1087 based on Foata normal form. 16/7018 useless extension candidates. Maximal degree in co-relation 44612. Up to 6266 conditions per place. [2024-05-12 13:10:53,409 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 263 selfloop transitions, 64 changer transitions 0/340 dead transitions. [2024-05-12 13:10:53,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 340 transitions, 4456 flow [2024-05-12 13:10:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:10:53,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-05-12 13:10:53,411 INFO L175 Difference]: Start difference. First operand has 164 places, 274 transitions, 3341 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:10:53,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 340 transitions, 4456 flow [2024-05-12 13:10:53,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 340 transitions, 4308 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:53,639 INFO L231 Difference]: Finished difference. Result has 172 places, 290 transitions, 3640 flow [2024-05-12 13:10:53,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3640, PETRI_PLACES=172, PETRI_TRANSITIONS=290} [2024-05-12 13:10:53,640 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 118 predicate places. [2024-05-12 13:10:53,640 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 290 transitions, 3640 flow [2024-05-12 13:10:53,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:53,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:53,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:53,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:10:53,641 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:53,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:53,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1626763394, now seen corresponding path program 3 times [2024-05-12 13:10:53,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:53,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104264540] [2024-05-12 13:10:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:54,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104264540] [2024-05-12 13:10:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104264540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:54,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:54,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:54,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829164768] [2024-05-12 13:10:54,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:54,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:54,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:55,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:55,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 290 transitions, 3640 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:55,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:55,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:55,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:56,511 INFO L124 PetriNetUnfolderBase]: 4615/7325 cut-off events. [2024-05-12 13:10:56,511 INFO L125 PetriNetUnfolderBase]: For 161544/161571 co-relation queries the response was YES. [2024-05-12 13:10:56,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45697 conditions, 7325 events. 4615/7325 cut-off events. For 161544/161571 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 45742 event pairs, 1171 based on Foata normal form. 14/7192 useless extension candidates. Maximal degree in co-relation 45620. Up to 6252 conditions per place. [2024-05-12 13:10:56,575 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 276 selfloop transitions, 60 changer transitions 0/349 dead transitions. [2024-05-12 13:10:56,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 349 transitions, 4642 flow [2024-05-12 13:10:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:10:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:10:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-05-12 13:10:56,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981060606060606 [2024-05-12 13:10:56,577 INFO L175 Difference]: Start difference. First operand has 172 places, 290 transitions, 3640 flow. Second operand 11 states and 263 transitions. [2024-05-12 13:10:56,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 349 transitions, 4642 flow [2024-05-12 13:10:56,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 349 transitions, 4408 flow, removed 83 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:56,739 INFO L231 Difference]: Finished difference. Result has 180 places, 293 transitions, 3626 flow [2024-05-12 13:10:56,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3626, PETRI_PLACES=180, PETRI_TRANSITIONS=293} [2024-05-12 13:10:56,739 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2024-05-12 13:10:56,740 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 293 transitions, 3626 flow [2024-05-12 13:10:56,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:56,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:56,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:10:56,740 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:56,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1883263904, now seen corresponding path program 4 times [2024-05-12 13:10:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:56,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698078663] [2024-05-12 13:10:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:56,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:57,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:57,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698078663] [2024-05-12 13:10:57,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698078663] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:57,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:57,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:57,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574634953] [2024-05-12 13:10:57,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:57,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:57,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:57,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:58,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:10:58,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 293 transitions, 3626 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:58,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:10:58,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:59,331 INFO L124 PetriNetUnfolderBase]: 4638/7367 cut-off events. [2024-05-12 13:10:59,331 INFO L125 PetriNetUnfolderBase]: For 172667/172694 co-relation queries the response was YES. [2024-05-12 13:10:59,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46633 conditions, 7367 events. 4638/7367 cut-off events. For 172667/172694 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 46114 event pairs, 1172 based on Foata normal form. 14/7237 useless extension candidates. Maximal degree in co-relation 46555. Up to 6284 conditions per place. [2024-05-12 13:10:59,404 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 276 selfloop transitions, 55 changer transitions 0/344 dead transitions. [2024-05-12 13:10:59,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 344 transitions, 4588 flow [2024-05-12 13:10:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-05-12 13:10:59,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-05-12 13:10:59,405 INFO L175 Difference]: Start difference. First operand has 180 places, 293 transitions, 3626 flow. Second operand 9 states and 226 transitions. [2024-05-12 13:10:59,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 344 transitions, 4588 flow [2024-05-12 13:10:59,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 344 transitions, 4411 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:59,600 INFO L231 Difference]: Finished difference. Result has 182 places, 296 transitions, 3665 flow [2024-05-12 13:10:59,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3665, PETRI_PLACES=182, PETRI_TRANSITIONS=296} [2024-05-12 13:10:59,601 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 128 predicate places. [2024-05-12 13:10:59,601 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 296 transitions, 3665 flow [2024-05-12 13:10:59,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:59,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:59,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:59,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:10:59,601 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:59,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:59,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1626763115, now seen corresponding path program 3 times [2024-05-12 13:10:59,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:59,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858323102] [2024-05-12 13:10:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:59,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858323102] [2024-05-12 13:11:00,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858323102] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:00,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:00,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:00,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623144581] [2024-05-12 13:11:00,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:00,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:00,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:00,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:00,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:00,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:00,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 296 transitions, 3665 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:00,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:00,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:00,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:02,030 INFO L124 PetriNetUnfolderBase]: 4842/7677 cut-off events. [2024-05-12 13:11:02,030 INFO L125 PetriNetUnfolderBase]: For 206449/206476 co-relation queries the response was YES. [2024-05-12 13:11:02,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49911 conditions, 7677 events. 4842/7677 cut-off events. For 206449/206476 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 48244 event pairs, 1189 based on Foata normal form. 32/7565 useless extension candidates. Maximal degree in co-relation 49832. Up to 6355 conditions per place. [2024-05-12 13:11:02,109 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 282 selfloop transitions, 57 changer transitions 0/352 dead transitions. [2024-05-12 13:11:02,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 352 transitions, 4675 flow [2024-05-12 13:11:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:11:02,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-05-12 13:11:02,111 INFO L175 Difference]: Start difference. First operand has 182 places, 296 transitions, 3665 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:11:02,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 352 transitions, 4675 flow [2024-05-12 13:11:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 352 transitions, 4483 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-05-12 13:11:02,349 INFO L231 Difference]: Finished difference. Result has 184 places, 299 transitions, 3672 flow [2024-05-12 13:11:02,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3672, PETRI_PLACES=184, PETRI_TRANSITIONS=299} [2024-05-12 13:11:02,350 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 130 predicate places. [2024-05-12 13:11:02,350 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 299 transitions, 3672 flow [2024-05-12 13:11:02,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:02,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:02,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:02,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:11:02,351 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:02,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:02,351 INFO L85 PathProgramCache]: Analyzing trace with hash -993788591, now seen corresponding path program 4 times [2024-05-12 13:11:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:02,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530134627] [2024-05-12 13:11:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:02,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530134627] [2024-05-12 13:11:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530134627] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:03,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:03,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797758118] [2024-05-12 13:11:03,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:03,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:03,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:03,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:03,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:03,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 299 transitions, 3672 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:03,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:03,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:03,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:04,766 INFO L124 PetriNetUnfolderBase]: 4884/7712 cut-off events. [2024-05-12 13:11:04,767 INFO L125 PetriNetUnfolderBase]: For 213579/213606 co-relation queries the response was YES. [2024-05-12 13:11:04,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50898 conditions, 7712 events. 4884/7712 cut-off events. For 213579/213606 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 48206 event pairs, 1186 based on Foata normal form. 16/7590 useless extension candidates. Maximal degree in co-relation 50818. Up to 6281 conditions per place. [2024-05-12 13:11:04,847 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 275 selfloop transitions, 77 changer transitions 0/365 dead transitions. [2024-05-12 13:11:04,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 365 transitions, 4759 flow [2024-05-12 13:11:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-05-12 13:11:04,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-05-12 13:11:04,848 INFO L175 Difference]: Start difference. First operand has 184 places, 299 transitions, 3672 flow. Second operand 10 states and 255 transitions. [2024-05-12 13:11:04,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 365 transitions, 4759 flow [2024-05-12 13:11:05,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 365 transitions, 4630 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-05-12 13:11:05,142 INFO L231 Difference]: Finished difference. Result has 188 places, 304 transitions, 3816 flow [2024-05-12 13:11:05,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3816, PETRI_PLACES=188, PETRI_TRANSITIONS=304} [2024-05-12 13:11:05,143 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 134 predicate places. [2024-05-12 13:11:05,143 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 304 transitions, 3816 flow [2024-05-12 13:11:05,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:05,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:05,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:05,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:11:05,143 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:05,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1617566624, now seen corresponding path program 5 times [2024-05-12 13:11:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:05,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776573601] [2024-05-12 13:11:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:05,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:06,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:06,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776573601] [2024-05-12 13:11:06,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776573601] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:06,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:06,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:06,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313378608] [2024-05-12 13:11:06,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:06,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:06,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:06,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:06,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:06,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:06,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 304 transitions, 3816 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:06,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:06,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:06,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:07,682 INFO L124 PetriNetUnfolderBase]: 4859/7430 cut-off events. [2024-05-12 13:11:07,682 INFO L125 PetriNetUnfolderBase]: For 209891/209903 co-relation queries the response was YES. [2024-05-12 13:11:07,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50752 conditions, 7430 events. 4859/7430 cut-off events. For 209891/209903 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 44359 event pairs, 907 based on Foata normal form. 6/7377 useless extension candidates. Maximal degree in co-relation 50670. Up to 6063 conditions per place. [2024-05-12 13:11:07,754 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 155 selfloop transitions, 198 changer transitions 0/366 dead transitions. [2024-05-12 13:11:07,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 366 transitions, 5142 flow [2024-05-12 13:11:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:11:07,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-05-12 13:11:07,756 INFO L175 Difference]: Start difference. First operand has 188 places, 304 transitions, 3816 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:11:07,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 366 transitions, 5142 flow [2024-05-12 13:11:08,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 366 transitions, 4988 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-05-12 13:11:08,008 INFO L231 Difference]: Finished difference. Result has 192 places, 316 transitions, 4607 flow [2024-05-12 13:11:08,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4607, PETRI_PLACES=192, PETRI_TRANSITIONS=316} [2024-05-12 13:11:08,009 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2024-05-12 13:11:08,009 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 316 transitions, 4607 flow [2024-05-12 13:11:08,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:08,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:08,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:08,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:11:08,010 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:08,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1617557045, now seen corresponding path program 5 times [2024-05-12 13:11:08,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:08,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747441601] [2024-05-12 13:11:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:08,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:09,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:09,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747441601] [2024-05-12 13:11:09,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747441601] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:09,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:09,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:09,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709052706] [2024-05-12 13:11:09,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:09,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:09,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:09,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:09,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 316 transitions, 4607 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:09,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:09,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:09,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:10,581 INFO L124 PetriNetUnfolderBase]: 4869/7543 cut-off events. [2024-05-12 13:11:10,581 INFO L125 PetriNetUnfolderBase]: For 229393/229420 co-relation queries the response was YES. [2024-05-12 13:11:10,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53170 conditions, 7543 events. 4869/7543 cut-off events. For 229393/229420 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 45960 event pairs, 1020 based on Foata normal form. 16/7480 useless extension candidates. Maximal degree in co-relation 53085. Up to 6425 conditions per place. [2024-05-12 13:11:10,667 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 264 selfloop transitions, 98 changer transitions 0/375 dead transitions. [2024-05-12 13:11:10,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 375 transitions, 5785 flow [2024-05-12 13:11:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:11:10,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-05-12 13:11:10,669 INFO L175 Difference]: Start difference. First operand has 192 places, 316 transitions, 4607 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:11:10,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 375 transitions, 5785 flow [2024-05-12 13:11:11,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 375 transitions, 5469 flow, removed 131 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:11,283 INFO L231 Difference]: Finished difference. Result has 199 places, 323 transitions, 4759 flow [2024-05-12 13:11:11,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4759, PETRI_PLACES=199, PETRI_TRANSITIONS=323} [2024-05-12 13:11:11,283 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 145 predicate places. [2024-05-12 13:11:11,284 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 323 transitions, 4759 flow [2024-05-12 13:11:11,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:11,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:11,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:11,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:11:11,284 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:11,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1333373525, now seen corresponding path program 2 times [2024-05-12 13:11:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:11,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949440821] [2024-05-12 13:11:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:11,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949440821] [2024-05-12 13:11:11,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949440821] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:11,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:11,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:11:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170015055] [2024-05-12 13:11:11,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:11:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:11:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:11:11,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:11:11,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 323 transitions, 4759 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:11,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:11,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:11:11,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:13,460 INFO L124 PetriNetUnfolderBase]: 5193/8231 cut-off events. [2024-05-12 13:11:13,460 INFO L125 PetriNetUnfolderBase]: For 236035/236035 co-relation queries the response was YES. [2024-05-12 13:11:13,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55581 conditions, 8231 events. 5193/8231 cut-off events. For 236035/236035 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 52046 event pairs, 1458 based on Foata normal form. 2/8056 useless extension candidates. Maximal degree in co-relation 55493. Up to 7265 conditions per place. [2024-05-12 13:11:13,562 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 281 selfloop transitions, 54 changer transitions 0/344 dead transitions. [2024-05-12 13:11:13,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 344 transitions, 5547 flow [2024-05-12 13:11:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:11:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:11:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-05-12 13:11:13,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-05-12 13:11:13,565 INFO L175 Difference]: Start difference. First operand has 199 places, 323 transitions, 4759 flow. Second operand 6 states and 140 transitions. [2024-05-12 13:11:13,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 344 transitions, 5547 flow [2024-05-12 13:11:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 344 transitions, 5177 flow, removed 133 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:13,942 INFO L231 Difference]: Finished difference. Result has 200 places, 323 transitions, 4503 flow [2024-05-12 13:11:13,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4503, PETRI_PLACES=200, PETRI_TRANSITIONS=323} [2024-05-12 13:11:13,943 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 146 predicate places. [2024-05-12 13:11:13,943 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 323 transitions, 4503 flow [2024-05-12 13:11:13,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:13,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:13,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:13,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:11:13,944 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:13,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1727882842, now seen corresponding path program 1 times [2024-05-12 13:11:13,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:13,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890617301] [2024-05-12 13:11:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:14,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:14,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890617301] [2024-05-12 13:11:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890617301] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:14,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:14,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:11:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469829320] [2024-05-12 13:11:14,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:14,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:11:14,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:11:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:11:14,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:14,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 323 transitions, 4503 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-05-12 13:11:14,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:14,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:14,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:15,849 INFO L124 PetriNetUnfolderBase]: 4695/7804 cut-off events. [2024-05-12 13:11:15,849 INFO L125 PetriNetUnfolderBase]: For 201242/201242 co-relation queries the response was YES. [2024-05-12 13:11:15,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49983 conditions, 7804 events. 4695/7804 cut-off events. For 201242/201242 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 51737 event pairs, 1253 based on Foata normal form. 1/7597 useless extension candidates. Maximal degree in co-relation 49893. Up to 6727 conditions per place. [2024-05-12 13:11:15,933 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 326 selfloop transitions, 19 changer transitions 0/355 dead transitions. [2024-05-12 13:11:15,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 355 transitions, 5449 flow [2024-05-12 13:11:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:11:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:11:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-05-12 13:11:15,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034722222222222 [2024-05-12 13:11:15,935 INFO L175 Difference]: Start difference. First operand has 200 places, 323 transitions, 4503 flow. Second operand 6 states and 145 transitions. [2024-05-12 13:11:15,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 355 transitions, 5449 flow [2024-05-12 13:11:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 355 transitions, 5287 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:16,202 INFO L231 Difference]: Finished difference. Result has 202 places, 333 transitions, 4508 flow [2024-05-12 13:11:16,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4508, PETRI_PLACES=202, PETRI_TRANSITIONS=333} [2024-05-12 13:11:16,203 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 148 predicate places. [2024-05-12 13:11:16,203 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 333 transitions, 4508 flow [2024-05-12 13:11:16,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-05-12 13:11:16,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:16,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:16,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:11:16,204 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:16,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1319961592, now seen corresponding path program 2 times [2024-05-12 13:11:16,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:16,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120697529] [2024-05-12 13:11:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:16,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:16,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:16,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120697529] [2024-05-12 13:11:16,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120697529] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:16,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:16,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:11:16,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819719363] [2024-05-12 13:11:16,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:16,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:11:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:11:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:11:16,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:16,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 333 transitions, 4508 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-05-12 13:11:16,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:16,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:16,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:18,209 INFO L124 PetriNetUnfolderBase]: 4692/7645 cut-off events. [2024-05-12 13:11:18,209 INFO L125 PetriNetUnfolderBase]: For 207947/207947 co-relation queries the response was YES. [2024-05-12 13:11:18,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50646 conditions, 7645 events. 4692/7645 cut-off events. For 207947/207947 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 49505 event pairs, 1319 based on Foata normal form. 1/7491 useless extension candidates. Maximal degree in co-relation 50554. Up to 6750 conditions per place. [2024-05-12 13:11:18,298 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 325 selfloop transitions, 14 changer transitions 0/349 dead transitions. [2024-05-12 13:11:18,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 349 transitions, 5250 flow [2024-05-12 13:11:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:11:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:11:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-05-12 13:11:18,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-05-12 13:11:18,299 INFO L175 Difference]: Start difference. First operand has 202 places, 333 transitions, 4508 flow. Second operand 6 states and 138 transitions. [2024-05-12 13:11:18,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 349 transitions, 5250 flow [2024-05-12 13:11:18,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 349 transitions, 5196 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-05-12 13:11:18,621 INFO L231 Difference]: Finished difference. Result has 207 places, 333 transitions, 4488 flow [2024-05-12 13:11:18,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4454, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4488, PETRI_PLACES=207, PETRI_TRANSITIONS=333} [2024-05-12 13:11:18,622 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 153 predicate places. [2024-05-12 13:11:18,622 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 333 transitions, 4488 flow [2024-05-12 13:11:18,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-05-12 13:11:18,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:18,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:18,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:11:18,622 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:18,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1984343409, now seen corresponding path program 1 times [2024-05-12 13:11:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548500483] [2024-05-12 13:11:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:20,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:20,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548500483] [2024-05-12 13:11:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548500483] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:20,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:20,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924771449] [2024-05-12 13:11:20,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:20,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:20,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:20,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 333 transitions, 4488 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:20,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:20,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:20,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:21,861 INFO L124 PetriNetUnfolderBase]: 5135/8247 cut-off events. [2024-05-12 13:11:21,862 INFO L125 PetriNetUnfolderBase]: For 266896/266926 co-relation queries the response was YES. [2024-05-12 13:11:21,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56633 conditions, 8247 events. 5135/8247 cut-off events. For 266896/266926 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 53435 event pairs, 1327 based on Foata normal form. 20/8072 useless extension candidates. Maximal degree in co-relation 56538. Up to 6733 conditions per place. [2024-05-12 13:11:21,965 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 297 selfloop transitions, 87 changer transitions 0/400 dead transitions. [2024-05-12 13:11:21,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 400 transitions, 5658 flow [2024-05-12 13:11:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-05-12 13:11:21,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-05-12 13:11:21,966 INFO L175 Difference]: Start difference. First operand has 207 places, 333 transitions, 4488 flow. Second operand 10 states and 249 transitions. [2024-05-12 13:11:21,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 400 transitions, 5658 flow [2024-05-12 13:11:22,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 400 transitions, 5612 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:22,329 INFO L231 Difference]: Finished difference. Result has 214 places, 339 transitions, 4781 flow [2024-05-12 13:11:22,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4781, PETRI_PLACES=214, PETRI_TRANSITIONS=339} [2024-05-12 13:11:22,329 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 160 predicate places. [2024-05-12 13:11:22,330 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 339 transitions, 4781 flow [2024-05-12 13:11:22,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:22,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:22,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:22,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:11:22,330 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:22,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1082452421, now seen corresponding path program 2 times [2024-05-12 13:11:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:22,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418522875] [2024-05-12 13:11:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:22,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:23,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418522875] [2024-05-12 13:11:23,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418522875] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:23,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:23,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:23,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317805630] [2024-05-12 13:11:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:23,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:23,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:23,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:23,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:23,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 339 transitions, 4781 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:23,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:23,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:25,455 INFO L124 PetriNetUnfolderBase]: 5257/8447 cut-off events. [2024-05-12 13:11:25,455 INFO L125 PetriNetUnfolderBase]: For 295184/295208 co-relation queries the response was YES. [2024-05-12 13:11:25,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59919 conditions, 8447 events. 5257/8447 cut-off events. For 295184/295208 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 54995 event pairs, 1318 based on Foata normal form. 16/8283 useless extension candidates. Maximal degree in co-relation 59822. Up to 6819 conditions per place. [2024-05-12 13:11:25,560 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 249 selfloop transitions, 137 changer transitions 0/402 dead transitions. [2024-05-12 13:11:25,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 402 transitions, 5919 flow [2024-05-12 13:11:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-05-12 13:11:25,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-05-12 13:11:25,575 INFO L175 Difference]: Start difference. First operand has 214 places, 339 transitions, 4781 flow. Second operand 10 states and 252 transitions. [2024-05-12 13:11:25,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 402 transitions, 5919 flow [2024-05-12 13:11:26,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 402 transitions, 5744 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:26,073 INFO L231 Difference]: Finished difference. Result has 218 places, 340 transitions, 4949 flow [2024-05-12 13:11:26,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4949, PETRI_PLACES=218, PETRI_TRANSITIONS=340} [2024-05-12 13:11:26,074 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 164 predicate places. [2024-05-12 13:11:26,074 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 340 transitions, 4949 flow [2024-05-12 13:11:26,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:26,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:26,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:11:26,074 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:26,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1082444051, now seen corresponding path program 3 times [2024-05-12 13:11:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:26,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314438363] [2024-05-12 13:11:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:27,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314438363] [2024-05-12 13:11:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314438363] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:27,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:27,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:27,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182397480] [2024-05-12 13:11:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:27,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:27,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:27,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:27,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 340 transitions, 4949 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:27,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:27,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:27,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:29,112 INFO L124 PetriNetUnfolderBase]: 5605/9005 cut-off events. [2024-05-12 13:11:29,112 INFO L125 PetriNetUnfolderBase]: For 324000/324024 co-relation queries the response was YES. [2024-05-12 13:11:29,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65022 conditions, 9005 events. 5605/9005 cut-off events. For 324000/324024 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 59184 event pairs, 1357 based on Foata normal form. 12/8815 useless extension candidates. Maximal degree in co-relation 64924. Up to 6812 conditions per place. [2024-05-12 13:11:29,216 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 252 selfloop transitions, 143 changer transitions 0/411 dead transitions. [2024-05-12 13:11:29,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 411 transitions, 6299 flow [2024-05-12 13:11:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-05-12 13:11:29,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-05-12 13:11:29,218 INFO L175 Difference]: Start difference. First operand has 218 places, 340 transitions, 4949 flow. Second operand 10 states and 254 transitions. [2024-05-12 13:11:29,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 411 transitions, 6299 flow [2024-05-12 13:11:29,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 411 transitions, 6000 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 13:11:29,607 INFO L231 Difference]: Finished difference. Result has 221 places, 346 transitions, 5193 flow [2024-05-12 13:11:29,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4650, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5193, PETRI_PLACES=221, PETRI_TRANSITIONS=346} [2024-05-12 13:11:29,608 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 167 predicate places. [2024-05-12 13:11:29,608 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 346 transitions, 5193 flow [2024-05-12 13:11:29,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:29,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:29,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:11:29,608 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:29,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2091968668, now seen corresponding path program 1 times [2024-05-12 13:11:29,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:29,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625550806] [2024-05-12 13:11:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:29,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:30,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625550806] [2024-05-12 13:11:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625550806] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:30,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:30,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:30,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464824761] [2024-05-12 13:11:30,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:30,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:30,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:30,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:30,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:30,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:11:30,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 346 transitions, 5193 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:30,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:30,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:11:30,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:32,281 INFO L124 PetriNetUnfolderBase]: 5957/9621 cut-off events. [2024-05-12 13:11:32,282 INFO L125 PetriNetUnfolderBase]: For 327179/327179 co-relation queries the response was YES. [2024-05-12 13:11:32,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67821 conditions, 9621 events. 5957/9621 cut-off events. For 327179/327179 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 64062 event pairs, 1674 based on Foata normal form. 2/9398 useless extension candidates. Maximal degree in co-relation 67721. Up to 8291 conditions per place. [2024-05-12 13:11:32,395 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 326 selfloop transitions, 73 changer transitions 0/408 dead transitions. [2024-05-12 13:11:32,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 408 transitions, 6714 flow [2024-05-12 13:11:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-05-12 13:11:32,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817708333333333 [2024-05-12 13:11:32,397 INFO L175 Difference]: Start difference. First operand has 221 places, 346 transitions, 5193 flow. Second operand 8 states and 185 transitions. [2024-05-12 13:11:32,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 408 transitions, 6714 flow [2024-05-12 13:11:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 408 transitions, 6454 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:32,900 INFO L231 Difference]: Finished difference. Result has 226 places, 371 transitions, 5523 flow [2024-05-12 13:11:32,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5523, PETRI_PLACES=226, PETRI_TRANSITIONS=371} [2024-05-12 13:11:32,900 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 172 predicate places. [2024-05-12 13:11:32,900 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 371 transitions, 5523 flow [2024-05-12 13:11:32,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:32,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:32,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:32,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:11:32,901 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:32,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:32,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1741875211, now seen corresponding path program 4 times [2024-05-12 13:11:32,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:32,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172681712] [2024-05-12 13:11:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:32,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:34,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172681712] [2024-05-12 13:11:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172681712] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:34,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784461368] [2024-05-12 13:11:34,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:34,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:34,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:34,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:34,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 371 transitions, 5523 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:34,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:34,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:34,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:36,414 INFO L124 PetriNetUnfolderBase]: 5881/9588 cut-off events. [2024-05-12 13:11:36,414 INFO L125 PetriNetUnfolderBase]: For 349978/350023 co-relation queries the response was YES. [2024-05-12 13:11:36,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69381 conditions, 9588 events. 5881/9588 cut-off events. For 349978/350023 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 64723 event pairs, 1384 based on Foata normal form. 24/9361 useless extension candidates. Maximal degree in co-relation 69276. Up to 7946 conditions per place. [2024-05-12 13:11:36,510 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 367 selfloop transitions, 56 changer transitions 0/440 dead transitions. [2024-05-12 13:11:36,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 440 transitions, 6807 flow [2024-05-12 13:11:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:11:36,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-05-12 13:11:36,517 INFO L175 Difference]: Start difference. First operand has 226 places, 371 transitions, 5523 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:11:36,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 440 transitions, 6807 flow [2024-05-12 13:11:36,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 440 transitions, 6771 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-05-12 13:11:36,954 INFO L231 Difference]: Finished difference. Result has 236 places, 379 transitions, 5742 flow [2024-05-12 13:11:36,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5742, PETRI_PLACES=236, PETRI_TRANSITIONS=379} [2024-05-12 13:11:36,956 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 182 predicate places. [2024-05-12 13:11:36,956 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 379 transitions, 5742 flow [2024-05-12 13:11:36,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:36,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:36,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:36,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:11:36,956 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:36,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:36,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370331, now seen corresponding path program 5 times [2024-05-12 13:11:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698997742] [2024-05-12 13:11:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:38,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:38,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698997742] [2024-05-12 13:11:38,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698997742] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:38,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:38,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104646861] [2024-05-12 13:11:38,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:38,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:38,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:38,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:38,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:38,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 379 transitions, 5742 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:38,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:38,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:40,579 INFO L124 PetriNetUnfolderBase]: 6197/9625 cut-off events. [2024-05-12 13:11:40,581 INFO L125 PetriNetUnfolderBase]: For 418578/418600 co-relation queries the response was YES. [2024-05-12 13:11:40,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76404 conditions, 9625 events. 6197/9625 cut-off events. For 418578/418600 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 61397 event pairs, 1060 based on Foata normal form. 12/9545 useless extension candidates. Maximal degree in co-relation 76295. Up to 7715 conditions per place. [2024-05-12 13:11:40,722 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 257 selfloop transitions, 180 changer transitions 0/454 dead transitions. [2024-05-12 13:11:40,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 454 transitions, 7434 flow [2024-05-12 13:11:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-05-12 13:11:40,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-05-12 13:11:40,727 INFO L175 Difference]: Start difference. First operand has 236 places, 379 transitions, 5742 flow. Second operand 10 states and 258 transitions. [2024-05-12 13:11:40,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 454 transitions, 7434 flow [2024-05-12 13:11:41,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 454 transitions, 7262 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:41,627 INFO L231 Difference]: Finished difference. Result has 242 places, 388 transitions, 6297 flow [2024-05-12 13:11:41,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6297, PETRI_PLACES=242, PETRI_TRANSITIONS=388} [2024-05-12 13:11:41,628 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2024-05-12 13:11:41,628 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 388 transitions, 6297 flow [2024-05-12 13:11:41,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:41,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:41,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:41,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:11:41,629 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:41,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1405170749, now seen corresponding path program 6 times [2024-05-12 13:11:41,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:41,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009695938] [2024-05-12 13:11:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:42,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009695938] [2024-05-12 13:11:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009695938] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:42,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:42,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:42,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088388002] [2024-05-12 13:11:42,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:42,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:42,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 388 transitions, 6297 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:42,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:42,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:42,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:44,949 INFO L124 PetriNetUnfolderBase]: 6489/10057 cut-off events. [2024-05-12 13:11:44,949 INFO L125 PetriNetUnfolderBase]: For 450615/450637 co-relation queries the response was YES. [2024-05-12 13:11:45,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81735 conditions, 10057 events. 6489/10057 cut-off events. For 450615/450637 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 64436 event pairs, 1084 based on Foata normal form. 12/9985 useless extension candidates. Maximal degree in co-relation 81623. Up to 6480 conditions per place. [2024-05-12 13:11:45,101 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 199 selfloop transitions, 243 changer transitions 0/459 dead transitions. [2024-05-12 13:11:45,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 459 transitions, 7873 flow [2024-05-12 13:11:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-05-12 13:11:45,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-05-12 13:11:45,104 INFO L175 Difference]: Start difference. First operand has 242 places, 388 transitions, 6297 flow. Second operand 10 states and 258 transitions. [2024-05-12 13:11:45,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 459 transitions, 7873 flow [2024-05-12 13:11:46,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 459 transitions, 7563 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:46,014 INFO L231 Difference]: Finished difference. Result has 250 places, 391 transitions, 6712 flow [2024-05-12 13:11:46,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6712, PETRI_PLACES=250, PETRI_TRANSITIONS=391} [2024-05-12 13:11:46,015 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 196 predicate places. [2024-05-12 13:11:46,015 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 391 transitions, 6712 flow [2024-05-12 13:11:46,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:46,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:46,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:46,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:11:46,016 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:46,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1109943179, now seen corresponding path program 7 times [2024-05-12 13:11:46,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:46,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043467519] [2024-05-12 13:11:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:46,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:47,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:47,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043467519] [2024-05-12 13:11:47,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043467519] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:47,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:47,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350100261] [2024-05-12 13:11:47,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:47,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:47,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:47,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:47,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 391 transitions, 6712 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:47,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:47,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:47,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:50,086 INFO L124 PetriNetUnfolderBase]: 6665/11019 cut-off events. [2024-05-12 13:11:50,086 INFO L125 PetriNetUnfolderBase]: For 500418/500463 co-relation queries the response was YES. [2024-05-12 13:11:50,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87154 conditions, 11019 events. 6665/11019 cut-off events. For 500418/500463 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 77386 event pairs, 1674 based on Foata normal form. 24/10739 useless extension candidates. Maximal degree in co-relation 87039. Up to 9164 conditions per place. [2024-05-12 13:11:50,553 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 380 selfloop transitions, 64 changer transitions 0/461 dead transitions. [2024-05-12 13:11:50,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 461 transitions, 8027 flow [2024-05-12 13:11:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:11:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:11:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 275 transitions. [2024-05-12 13:11:50,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-05-12 13:11:50,555 INFO L175 Difference]: Start difference. First operand has 250 places, 391 transitions, 6712 flow. Second operand 11 states and 275 transitions. [2024-05-12 13:11:50,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 461 transitions, 8027 flow [2024-05-12 13:11:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 461 transitions, 7701 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:51,373 INFO L231 Difference]: Finished difference. Result has 255 places, 393 transitions, 6603 flow [2024-05-12 13:11:51,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6386, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6603, PETRI_PLACES=255, PETRI_TRANSITIONS=393} [2024-05-12 13:11:51,374 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 201 predicate places. [2024-05-12 13:11:51,374 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 393 transitions, 6603 flow [2024-05-12 13:11:51,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:51,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:51,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:51,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:11:51,377 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:51,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:51,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1970015371, now seen corresponding path program 8 times [2024-05-12 13:11:51,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:51,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447330149] [2024-05-12 13:11:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:51,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:52,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447330149] [2024-05-12 13:11:52,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447330149] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:52,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:52,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441211821] [2024-05-12 13:11:52,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:52,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:52,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:52,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:52,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:52,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 393 transitions, 6603 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:52,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:52,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:52,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:55,295 INFO L124 PetriNetUnfolderBase]: 6757/11107 cut-off events. [2024-05-12 13:11:55,295 INFO L125 PetriNetUnfolderBase]: For 506434/506479 co-relation queries the response was YES. [2024-05-12 13:11:55,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88706 conditions, 11107 events. 6757/11107 cut-off events. For 506434/506479 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 77678 event pairs, 1572 based on Foata normal form. 20/10841 useless extension candidates. Maximal degree in co-relation 88589. Up to 9005 conditions per place. [2024-05-12 13:11:55,455 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 376 selfloop transitions, 64 changer transitions 0/457 dead transitions. [2024-05-12 13:11:55,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 457 transitions, 7906 flow [2024-05-12 13:11:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-05-12 13:11:55,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270833333333333 [2024-05-12 13:11:55,457 INFO L175 Difference]: Start difference. First operand has 255 places, 393 transitions, 6603 flow. Second operand 10 states and 253 transitions. [2024-05-12 13:11:55,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 457 transitions, 7906 flow [2024-05-12 13:11:56,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 457 transitions, 7754 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-05-12 13:11:56,479 INFO L231 Difference]: Finished difference. Result has 256 places, 394 transitions, 6660 flow [2024-05-12 13:11:56,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6660, PETRI_PLACES=256, PETRI_TRANSITIONS=394} [2024-05-12 13:11:56,480 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 202 predicate places. [2024-05-12 13:11:56,480 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 394 transitions, 6660 flow [2024-05-12 13:11:56,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:56,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:56,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:56,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:11:56,481 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:56,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1395043049, now seen corresponding path program 9 times [2024-05-12 13:11:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654014351] [2024-05-12 13:11:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:56,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:57,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654014351] [2024-05-12 13:11:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654014351] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:57,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:57,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380199076] [2024-05-12 13:11:57,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:57,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:57,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:11:57,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 394 transitions, 6660 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:57,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:57,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:11:57,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:00,433 INFO L124 PetriNetUnfolderBase]: 6860/11311 cut-off events. [2024-05-12 13:12:00,434 INFO L125 PetriNetUnfolderBase]: For 531402/531447 co-relation queries the response was YES. [2024-05-12 13:12:00,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90394 conditions, 11311 events. 6860/11311 cut-off events. For 531402/531447 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79654 event pairs, 1622 based on Foata normal form. 24/11041 useless extension candidates. Maximal degree in co-relation 90276. Up to 9125 conditions per place. [2024-05-12 13:12:00,612 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 367 selfloop transitions, 93 changer transitions 0/477 dead transitions. [2024-05-12 13:12:00,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 477 transitions, 8100 flow [2024-05-12 13:12:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 13:12:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 13:12:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 301 transitions. [2024-05-12 13:12:00,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225694444444444 [2024-05-12 13:12:00,614 INFO L175 Difference]: Start difference. First operand has 256 places, 394 transitions, 6660 flow. Second operand 12 states and 301 transitions. [2024-05-12 13:12:00,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 477 transitions, 8100 flow [2024-05-12 13:12:01,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 477 transitions, 7937 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:01,742 INFO L231 Difference]: Finished difference. Result has 263 places, 401 transitions, 6876 flow [2024-05-12 13:12:01,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6497, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6876, PETRI_PLACES=263, PETRI_TRANSITIONS=401} [2024-05-12 13:12:01,743 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2024-05-12 13:12:01,743 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 401 transitions, 6876 flow [2024-05-12 13:12:01,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:01,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:01,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:01,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:12:01,744 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:01,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:01,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1395051419, now seen corresponding path program 10 times [2024-05-12 13:12:01,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:01,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104779982] [2024-05-12 13:12:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:01,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:02,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:02,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104779982] [2024-05-12 13:12:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104779982] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:02,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163454921] [2024-05-12 13:12:02,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:02,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:03,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:03,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 401 transitions, 6876 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:03,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:03,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:03,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:05,680 INFO L124 PetriNetUnfolderBase]: 6858/10678 cut-off events. [2024-05-12 13:12:05,680 INFO L125 PetriNetUnfolderBase]: For 514588/514610 co-relation queries the response was YES. [2024-05-12 13:12:05,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90066 conditions, 10678 events. 6858/10678 cut-off events. For 514588/514610 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 69775 event pairs, 1184 based on Foata normal form. 12/10606 useless extension candidates. Maximal degree in co-relation 89945. Up to 8700 conditions per place. [2024-05-12 13:12:05,811 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 217 selfloop transitions, 236 changer transitions 0/470 dead transitions. [2024-05-12 13:12:05,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 470 transitions, 8332 flow [2024-05-12 13:12:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:12:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:12:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 13:12:05,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:12:05,813 INFO L175 Difference]: Start difference. First operand has 263 places, 401 transitions, 6876 flow. Second operand 10 states and 256 transitions. [2024-05-12 13:12:05,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 470 transitions, 8332 flow [2024-05-12 13:12:06,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 470 transitions, 8159 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-05-12 13:12:06,641 INFO L231 Difference]: Finished difference. Result has 266 places, 405 transitions, 7389 flow [2024-05-12 13:12:06,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7389, PETRI_PLACES=266, PETRI_TRANSITIONS=405} [2024-05-12 13:12:06,641 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 212 predicate places. [2024-05-12 13:12:06,641 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 405 transitions, 7389 flow [2024-05-12 13:12:06,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:06,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:06,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:06,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:12:06,642 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:06,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1748131321, now seen corresponding path program 11 times [2024-05-12 13:12:06,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:06,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781896507] [2024-05-12 13:12:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:06,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:07,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:07,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781896507] [2024-05-12 13:12:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781896507] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:07,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:07,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619427965] [2024-05-12 13:12:07,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:07,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:07,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:08,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:08,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 405 transitions, 7389 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:08,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:08,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:08,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:10,658 INFO L124 PetriNetUnfolderBase]: 7027/11686 cut-off events. [2024-05-12 13:12:10,658 INFO L125 PetriNetUnfolderBase]: For 554153/554198 co-relation queries the response was YES. [2024-05-12 13:12:10,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94095 conditions, 11686 events. 7027/11686 cut-off events. For 554153/554198 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 83610 event pairs, 1788 based on Foata normal form. 24/11381 useless extension candidates. Maximal degree in co-relation 93972. Up to 9798 conditions per place. [2024-05-12 13:12:10,844 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 395 selfloop transitions, 54 changer transitions 0/466 dead transitions. [2024-05-12 13:12:10,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 466 transitions, 8671 flow [2024-05-12 13:12:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:12:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:12:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:12:10,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-05-12 13:12:10,845 INFO L175 Difference]: Start difference. First operand has 266 places, 405 transitions, 7389 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:12:10,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 466 transitions, 8671 flow [2024-05-12 13:12:12,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 466 transitions, 8273 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-05-12 13:12:12,117 INFO L231 Difference]: Finished difference. Result has 270 places, 406 transitions, 7178 flow [2024-05-12 13:12:12,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6991, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7178, PETRI_PLACES=270, PETRI_TRANSITIONS=406} [2024-05-12 13:12:12,118 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 216 predicate places. [2024-05-12 13:12:12,118 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 406 transitions, 7178 flow [2024-05-12 13:12:12,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:12,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:12,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:12,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:12:12,119 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:12,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1748361961, now seen corresponding path program 12 times [2024-05-12 13:12:12,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:12,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258453616] [2024-05-12 13:12:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:12,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:13,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258453616] [2024-05-12 13:12:13,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258453616] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:13,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:13,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:13,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294582472] [2024-05-12 13:12:13,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:13,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:13,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:13,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:13,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:13,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:13,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 406 transitions, 7178 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:13,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:13,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:13,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:16,106 INFO L124 PetriNetUnfolderBase]: 7063/11694 cut-off events. [2024-05-12 13:12:16,107 INFO L125 PetriNetUnfolderBase]: For 532722/532767 co-relation queries the response was YES. [2024-05-12 13:12:16,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92852 conditions, 11694 events. 7063/11694 cut-off events. For 532722/532767 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 83346 event pairs, 1691 based on Foata normal form. 24/11402 useless extension candidates. Maximal degree in co-relation 92727. Up to 9763 conditions per place. [2024-05-12 13:12:16,291 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 395 selfloop transitions, 65 changer transitions 0/477 dead transitions. [2024-05-12 13:12:16,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 477 transitions, 8536 flow [2024-05-12 13:12:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:12:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:12:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-05-12 13:12:16,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246212121212122 [2024-05-12 13:12:16,292 INFO L175 Difference]: Start difference. First operand has 270 places, 406 transitions, 7178 flow. Second operand 11 states and 277 transitions. [2024-05-12 13:12:16,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 477 transitions, 8536 flow [2024-05-12 13:12:17,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 477 transitions, 8323 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:17,872 INFO L231 Difference]: Finished difference. Result has 274 places, 409 transitions, 7197 flow [2024-05-12 13:12:17,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6991, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7197, PETRI_PLACES=274, PETRI_TRANSITIONS=409} [2024-05-12 13:12:17,873 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 220 predicate places. [2024-05-12 13:12:17,873 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 409 transitions, 7197 flow [2024-05-12 13:12:17,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:17,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:17,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:17,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:12:17,874 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:17,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1615095160, now seen corresponding path program 2 times [2024-05-12 13:12:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233872656] [2024-05-12 13:12:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233872656] [2024-05-12 13:12:18,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233872656] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:18,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:18,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295696865] [2024-05-12 13:12:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:18,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:12:18,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 409 transitions, 7197 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:18,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:18,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:12:18,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:21,211 INFO L124 PetriNetUnfolderBase]: 7386/12226 cut-off events. [2024-05-12 13:12:21,211 INFO L125 PetriNetUnfolderBase]: For 497329/497329 co-relation queries the response was YES. [2024-05-12 13:12:21,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93900 conditions, 12226 events. 7386/12226 cut-off events. For 497329/497329 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 87366 event pairs, 1986 based on Foata normal form. 2/11922 useless extension candidates. Maximal degree in co-relation 93775. Up to 10492 conditions per place. [2024-05-12 13:12:21,373 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 351 selfloop transitions, 81 changer transitions 0/441 dead transitions. [2024-05-12 13:12:21,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 441 transitions, 8480 flow [2024-05-12 13:12:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-05-12 13:12:21,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-05-12 13:12:21,375 INFO L175 Difference]: Start difference. First operand has 274 places, 409 transitions, 7197 flow. Second operand 7 states and 165 transitions. [2024-05-12 13:12:21,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 441 transitions, 8480 flow [2024-05-12 13:12:22,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 441 transitions, 8342 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-05-12 13:12:22,382 INFO L231 Difference]: Finished difference. Result has 272 places, 412 transitions, 7282 flow [2024-05-12 13:12:22,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7059, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7282, PETRI_PLACES=272, PETRI_TRANSITIONS=412} [2024-05-12 13:12:22,382 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 218 predicate places. [2024-05-12 13:12:22,383 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 412 transitions, 7282 flow [2024-05-12 13:12:22,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:22,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:22,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:22,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:12:22,383 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:22,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1615540630, now seen corresponding path program 3 times [2024-05-12 13:12:22,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:22,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261958487] [2024-05-12 13:12:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:22,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:23,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:23,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261958487] [2024-05-12 13:12:23,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261958487] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:23,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:23,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:23,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290585036] [2024-05-12 13:12:23,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:23,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:23,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:23,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:12:23,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 412 transitions, 7282 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:23,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:23,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:12:23,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:26,151 INFO L124 PetriNetUnfolderBase]: 7380/12218 cut-off events. [2024-05-12 13:12:26,152 INFO L125 PetriNetUnfolderBase]: For 500812/500812 co-relation queries the response was YES. [2024-05-12 13:12:26,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93672 conditions, 12218 events. 7380/12218 cut-off events. For 500812/500812 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 87294 event pairs, 1977 based on Foata normal form. 2/11914 useless extension candidates. Maximal degree in co-relation 93546. Up to 10487 conditions per place. [2024-05-12 13:12:26,461 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 348 selfloop transitions, 83 changer transitions 0/440 dead transitions. [2024-05-12 13:12:26,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 440 transitions, 8412 flow [2024-05-12 13:12:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 13:12:26,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-05-12 13:12:26,463 INFO L175 Difference]: Start difference. First operand has 272 places, 412 transitions, 7282 flow. Second operand 7 states and 163 transitions. [2024-05-12 13:12:26,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 440 transitions, 8412 flow [2024-05-12 13:12:27,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 440 transitions, 8231 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:27,562 INFO L231 Difference]: Finished difference. Result has 276 places, 412 transitions, 7273 flow [2024-05-12 13:12:27,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7101, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7273, PETRI_PLACES=276, PETRI_TRANSITIONS=412} [2024-05-12 13:12:27,562 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 222 predicate places. [2024-05-12 13:12:27,563 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 412 transitions, 7273 flow [2024-05-12 13:12:27,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:27,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:27,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:12:27,563 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:27,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -141915882, now seen corresponding path program 4 times [2024-05-12 13:12:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:27,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765741838] [2024-05-12 13:12:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:28,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:28,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765741838] [2024-05-12 13:12:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765741838] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:28,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:28,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:28,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876204456] [2024-05-12 13:12:28,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:28,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:28,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:28,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:12:28,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 412 transitions, 7273 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:28,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:28,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:12:28,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:30,963 INFO L124 PetriNetUnfolderBase]: 7567/12541 cut-off events. [2024-05-12 13:12:30,963 INFO L125 PetriNetUnfolderBase]: For 510246/510246 co-relation queries the response was YES. [2024-05-12 13:12:31,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95508 conditions, 12541 events. 7567/12541 cut-off events. For 510246/510246 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 90077 event pairs, 2010 based on Foata normal form. 2/12232 useless extension candidates. Maximal degree in co-relation 95381. Up to 10624 conditions per place. [2024-05-12 13:12:31,152 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 367 selfloop transitions, 112 changer transitions 0/488 dead transitions. [2024-05-12 13:12:31,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 488 transitions, 8946 flow [2024-05-12 13:12:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:12:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:12:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:12:31,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-05-12 13:12:31,153 INFO L175 Difference]: Start difference. First operand has 276 places, 412 transitions, 7273 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:12:31,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 488 transitions, 8946 flow [2024-05-12 13:12:32,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 488 transitions, 8705 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:32,432 INFO L231 Difference]: Finished difference. Result has 282 places, 443 transitions, 7828 flow [2024-05-12 13:12:32,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7086, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7828, PETRI_PLACES=282, PETRI_TRANSITIONS=443} [2024-05-12 13:12:32,433 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 228 predicate places. [2024-05-12 13:12:32,433 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 443 transitions, 7828 flow [2024-05-12 13:12:32,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:32,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:12:32,434 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:32,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2024879231, now seen corresponding path program 1 times [2024-05-12 13:12:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:32,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56274761] [2024-05-12 13:12:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:32,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:33,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:33,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56274761] [2024-05-12 13:12:33,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56274761] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:33,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905308278] [2024-05-12 13:12:33,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:33,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:33,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 443 transitions, 7828 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:33,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:33,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:33,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:35,917 INFO L124 PetriNetUnfolderBase]: 7220/12202 cut-off events. [2024-05-12 13:12:35,918 INFO L125 PetriNetUnfolderBase]: For 473764/473764 co-relation queries the response was YES. [2024-05-12 13:12:36,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93067 conditions, 12202 events. 7220/12202 cut-off events. For 473764/473764 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 89669 event pairs, 1842 based on Foata normal form. 1/11845 useless extension candidates. Maximal degree in co-relation 92936. Up to 10526 conditions per place. [2024-05-12 13:12:36,089 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 440 selfloop transitions, 16 changer transitions 0/475 dead transitions. [2024-05-12 13:12:36,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 475 transitions, 8932 flow [2024-05-12 13:12:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-05-12 13:12:36,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-05-12 13:12:36,091 INFO L175 Difference]: Start difference. First operand has 282 places, 443 transitions, 7828 flow. Second operand 7 states and 166 transitions. [2024-05-12 13:12:36,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 475 transitions, 8932 flow [2024-05-12 13:12:37,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 475 transitions, 8816 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:37,036 INFO L231 Difference]: Finished difference. Result has 286 places, 446 transitions, 7810 flow [2024-05-12 13:12:37,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7810, PETRI_PLACES=286, PETRI_TRANSITIONS=446} [2024-05-12 13:12:37,037 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 232 predicate places. [2024-05-12 13:12:37,037 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 446 transitions, 7810 flow [2024-05-12 13:12:37,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:37,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:37,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:37,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:12:37,037 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:37,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash 664414909, now seen corresponding path program 2 times [2024-05-12 13:12:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:37,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106771556] [2024-05-12 13:12:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:37,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:37,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106771556] [2024-05-12 13:12:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106771556] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:37,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:37,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:37,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718548861] [2024-05-12 13:12:37,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:37,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:37,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:37,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:37,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:37,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 446 transitions, 7810 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:37,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:37,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:37,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:40,249 INFO L124 PetriNetUnfolderBase]: 7242/12235 cut-off events. [2024-05-12 13:12:40,249 INFO L125 PetriNetUnfolderBase]: For 485104/485104 co-relation queries the response was YES. [2024-05-12 13:12:40,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93675 conditions, 12235 events. 7242/12235 cut-off events. For 485104/485104 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 89966 event pairs, 1848 based on Foata normal form. 1/11878 useless extension candidates. Maximal degree in co-relation 93542. Up to 10506 conditions per place. [2024-05-12 13:12:40,463 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 431 selfloop transitions, 29 changer transitions 0/479 dead transitions. [2024-05-12 13:12:40,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 479 transitions, 9082 flow [2024-05-12 13:12:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 13:12:40,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:12:40,465 INFO L175 Difference]: Start difference. First operand has 286 places, 446 transitions, 7810 flow. Second operand 7 states and 168 transitions. [2024-05-12 13:12:40,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 479 transitions, 9082 flow [2024-05-12 13:12:41,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 479 transitions, 9006 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:41,600 INFO L231 Difference]: Finished difference. Result has 288 places, 452 transitions, 7924 flow [2024-05-12 13:12:41,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7924, PETRI_PLACES=288, PETRI_TRANSITIONS=452} [2024-05-12 13:12:41,601 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 234 predicate places. [2024-05-12 13:12:41,601 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 452 transitions, 7924 flow [2024-05-12 13:12:41,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:41,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:41,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:41,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:12:41,602 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:41,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:41,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2024759075, now seen corresponding path program 1 times [2024-05-12 13:12:41,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:41,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499976380] [2024-05-12 13:12:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:41,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:42,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499976380] [2024-05-12 13:12:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499976380] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:42,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:42,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:42,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186459844] [2024-05-12 13:12:42,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:42,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:42,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:42,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:42,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 452 transitions, 7924 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:42,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:42,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:42,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:44,768 INFO L124 PetriNetUnfolderBase]: 7304/12337 cut-off events. [2024-05-12 13:12:44,769 INFO L125 PetriNetUnfolderBase]: For 501503/501503 co-relation queries the response was YES. [2024-05-12 13:12:44,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94935 conditions, 12337 events. 7304/12337 cut-off events. For 501503/501503 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 90760 event pairs, 1852 based on Foata normal form. 2/11977 useless extension candidates. Maximal degree in co-relation 94801. Up to 10577 conditions per place. [2024-05-12 13:12:44,970 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 445 selfloop transitions, 29 changer transitions 0/493 dead transitions. [2024-05-12 13:12:44,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 493 transitions, 9239 flow [2024-05-12 13:12:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:12:44,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-05-12 13:12:44,972 INFO L175 Difference]: Start difference. First operand has 288 places, 452 transitions, 7924 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:12:44,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 493 transitions, 9239 flow [2024-05-12 13:12:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 493 transitions, 9160 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:46,118 INFO L231 Difference]: Finished difference. Result has 293 places, 464 transitions, 8070 flow [2024-05-12 13:12:46,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7845, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8070, PETRI_PLACES=293, PETRI_TRANSITIONS=464} [2024-05-12 13:12:46,119 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 239 predicate places. [2024-05-12 13:12:46,119 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 464 transitions, 8070 flow [2024-05-12 13:12:46,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:46,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:46,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:46,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:12:46,119 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:46,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:46,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2037121193, now seen corresponding path program 2 times [2024-05-12 13:12:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:46,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694995476] [2024-05-12 13:12:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:46,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:46,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694995476] [2024-05-12 13:12:46,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694995476] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:46,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:46,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:46,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230524433] [2024-05-12 13:12:46,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:46,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:46,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:46,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:46,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 464 transitions, 8070 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:46,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:46,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:49,502 INFO L124 PetriNetUnfolderBase]: 7328/12336 cut-off events. [2024-05-12 13:12:49,503 INFO L125 PetriNetUnfolderBase]: For 521195/521195 co-relation queries the response was YES. [2024-05-12 13:12:49,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96700 conditions, 12336 events. 7328/12336 cut-off events. For 521195/521195 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 90517 event pairs, 1999 based on Foata normal form. 2/12018 useless extension candidates. Maximal degree in co-relation 96563. Up to 10639 conditions per place. [2024-05-12 13:12:49,688 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 447 selfloop transitions, 25 changer transitions 0/491 dead transitions. [2024-05-12 13:12:49,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 491 transitions, 9278 flow [2024-05-12 13:12:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-05-12 13:12:49,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-05-12 13:12:49,690 INFO L175 Difference]: Start difference. First operand has 293 places, 464 transitions, 8070 flow. Second operand 7 states and 164 transitions. [2024-05-12 13:12:49,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 491 transitions, 9278 flow [2024-05-12 13:12:50,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 491 transitions, 9222 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-05-12 13:12:50,753 INFO L231 Difference]: Finished difference. Result has 298 places, 467 transitions, 8114 flow [2024-05-12 13:12:50,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8020, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8114, PETRI_PLACES=298, PETRI_TRANSITIONS=467} [2024-05-12 13:12:50,754 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 244 predicate places. [2024-05-12 13:12:50,754 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 467 transitions, 8114 flow [2024-05-12 13:12:50,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:50,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:50,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:50,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:12:50,754 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:50,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1819028381, now seen corresponding path program 3 times [2024-05-12 13:12:50,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:50,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602733668] [2024-05-12 13:12:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:50,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:51,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602733668] [2024-05-12 13:12:51,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602733668] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:51,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:51,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:51,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738573283] [2024-05-12 13:12:51,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:51,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:51,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:51,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:51,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:51,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:51,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 467 transitions, 8114 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:51,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:51,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:51,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:54,123 INFO L124 PetriNetUnfolderBase]: 7325/12332 cut-off events. [2024-05-12 13:12:54,123 INFO L125 PetriNetUnfolderBase]: For 525387/525387 co-relation queries the response was YES. [2024-05-12 13:12:54,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96655 conditions, 12332 events. 7325/12332 cut-off events. For 525387/525387 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90474 event pairs, 2000 based on Foata normal form. 1/12013 useless extension candidates. Maximal degree in co-relation 96515. Up to 10680 conditions per place. [2024-05-12 13:12:54,326 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 452 selfloop transitions, 17 changer transitions 0/488 dead transitions. [2024-05-12 13:12:54,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 488 transitions, 9154 flow [2024-05-12 13:12:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-05-12 13:12:54,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-05-12 13:12:54,327 INFO L175 Difference]: Start difference. First operand has 298 places, 467 transitions, 8114 flow. Second operand 7 states and 159 transitions. [2024-05-12 13:12:54,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 488 transitions, 9154 flow [2024-05-12 13:12:55,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 488 transitions, 9028 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:55,495 INFO L231 Difference]: Finished difference. Result has 300 places, 467 transitions, 8028 flow [2024-05-12 13:12:55,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7988, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8028, PETRI_PLACES=300, PETRI_TRANSITIONS=467} [2024-05-12 13:12:55,496 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 246 predicate places. [2024-05-12 13:12:55,496 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 467 transitions, 8028 flow [2024-05-12 13:12:55,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:55,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:55,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:55,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:12:55,497 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:55,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:55,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1615546613, now seen corresponding path program 3 times [2024-05-12 13:12:55,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:55,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194110331] [2024-05-12 13:12:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:55,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:56,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194110331] [2024-05-12 13:12:56,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194110331] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:56,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:56,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:56,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382542750] [2024-05-12 13:12:56,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:56,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:56,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 467 transitions, 8028 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:56,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:56,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:56,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:58,834 INFO L124 PetriNetUnfolderBase]: 7319/12325 cut-off events. [2024-05-12 13:12:58,835 INFO L125 PetriNetUnfolderBase]: For 529585/529585 co-relation queries the response was YES. [2024-05-12 13:12:58,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96320 conditions, 12325 events. 7319/12325 cut-off events. For 529585/529585 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 90500 event pairs, 2003 based on Foata normal form. 2/12007 useless extension candidates. Maximal degree in co-relation 96180. Up to 10661 conditions per place. [2024-05-12 13:12:59,044 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 448 selfloop transitions, 20 changer transitions 0/487 dead transitions. [2024-05-12 13:12:59,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 487 transitions, 9052 flow [2024-05-12 13:12:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-05-12 13:12:59,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-05-12 13:12:59,045 INFO L175 Difference]: Start difference. First operand has 300 places, 467 transitions, 8028 flow. Second operand 7 states and 159 transitions. [2024-05-12 13:12:59,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 487 transitions, 9052 flow [2024-05-12 13:13:00,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 487 transitions, 8982 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 13:13:00,075 INFO L231 Difference]: Finished difference. Result has 301 places, 467 transitions, 8005 flow [2024-05-12 13:13:00,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7958, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8005, PETRI_PLACES=301, PETRI_TRANSITIONS=467} [2024-05-12 13:13:00,075 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 247 predicate places. [2024-05-12 13:13:00,076 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 467 transitions, 8005 flow [2024-05-12 13:13:00,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:00,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:00,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:00,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:13:00,076 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:00,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2030402097, now seen corresponding path program 1 times [2024-05-12 13:13:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942473890] [2024-05-12 13:13:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:01,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942473890] [2024-05-12 13:13:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942473890] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:01,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:01,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:13:01,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530174288] [2024-05-12 13:13:01,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:01,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:13:01,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:13:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:13:01,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:13:01,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 467 transitions, 8005 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:01,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:01,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:13:01,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:04,359 INFO L124 PetriNetUnfolderBase]: 7570/12594 cut-off events. [2024-05-12 13:13:04,360 INFO L125 PetriNetUnfolderBase]: For 620818/620884 co-relation queries the response was YES. [2024-05-12 13:13:04,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100868 conditions, 12594 events. 7570/12594 cut-off events. For 620818/620884 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 91178 event pairs, 1879 based on Foata normal form. 16/12246 useless extension candidates. Maximal degree in co-relation 100727. Up to 10333 conditions per place. [2024-05-12 13:13:04,576 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 399 selfloop transitions, 117 changer transitions 0/537 dead transitions. [2024-05-12 13:13:04,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 537 transitions, 9601 flow [2024-05-12 13:13:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:13:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:13:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-05-12 13:13:04,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2024-05-12 13:13:04,578 INFO L175 Difference]: Start difference. First operand has 301 places, 467 transitions, 8005 flow. Second operand 11 states and 266 transitions. [2024-05-12 13:13:04,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 537 transitions, 9601 flow [2024-05-12 13:13:05,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 537 transitions, 9546 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:13:05,864 INFO L231 Difference]: Finished difference. Result has 307 places, 475 transitions, 8495 flow [2024-05-12 13:13:05,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7950, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8495, PETRI_PLACES=307, PETRI_TRANSITIONS=475} [2024-05-12 13:13:05,865 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 253 predicate places. [2024-05-12 13:13:05,865 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 475 transitions, 8495 flow [2024-05-12 13:13:05,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:05,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:05,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:05,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:13:05,866 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:05,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 130004857, now seen corresponding path program 2 times [2024-05-12 13:13:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:05,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375003949] [2024-05-12 13:13:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:05,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:07,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:07,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375003949] [2024-05-12 13:13:07,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375003949] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:07,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:07,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:13:07,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296884830] [2024-05-12 13:13:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:13:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:13:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:13:07,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:13:07,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 475 transitions, 8495 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:07,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:07,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:13:07,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:10,372 INFO L124 PetriNetUnfolderBase]: 7666/12784 cut-off events. [2024-05-12 13:13:10,372 INFO L125 PetriNetUnfolderBase]: For 659525/659591 co-relation queries the response was YES. [2024-05-12 13:13:10,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104080 conditions, 12784 events. 7666/12784 cut-off events. For 659525/659591 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 92730 event pairs, 1733 based on Foata normal form. 16/12448 useless extension candidates. Maximal degree in co-relation 103937. Up to 10723 conditions per place. [2024-05-12 13:13:11,123 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 451 selfloop transitions, 73 changer transitions 0/545 dead transitions. [2024-05-12 13:13:11,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 545 transitions, 10081 flow [2024-05-12 13:13:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:13:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:13:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-05-12 13:13:11,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:13:11,168 INFO L175 Difference]: Start difference. First operand has 307 places, 475 transitions, 8495 flow. Second operand 11 states and 264 transitions. [2024-05-12 13:13:11,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 545 transitions, 10081 flow [2024-05-12 13:13:12,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 545 transitions, 9726 flow, removed 113 selfloop flow, removed 6 redundant places. [2024-05-12 13:13:12,489 INFO L231 Difference]: Finished difference. Result has 315 places, 483 transitions, 8592 flow [2024-05-12 13:13:12,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8140, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8592, PETRI_PLACES=315, PETRI_TRANSITIONS=483} [2024-05-12 13:13:12,491 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 261 predicate places. [2024-05-12 13:13:12,492 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 483 transitions, 8592 flow [2024-05-12 13:13:12,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:12,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:12,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:13:12,492 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:12,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:12,494 INFO L85 PathProgramCache]: Analyzing trace with hash 596903083, now seen corresponding path program 3 times [2024-05-12 13:13:12,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:12,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561965786] [2024-05-12 13:13:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:12,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561965786] [2024-05-12 13:13:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561965786] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:13,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:13,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:13:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887620435] [2024-05-12 13:13:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:13,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:13:13,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:13:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:13:14,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:13:14,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 483 transitions, 8592 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:14,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:14,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:13:14,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:17,679 INFO L124 PetriNetUnfolderBase]: 7746/12867 cut-off events. [2024-05-12 13:13:17,684 INFO L125 PetriNetUnfolderBase]: For 675160/675218 co-relation queries the response was YES. [2024-05-12 13:13:17,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105532 conditions, 12867 events. 7746/12867 cut-off events. For 675160/675218 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 93244 event pairs, 2007 based on Foata normal form. 16/12552 useless extension candidates. Maximal degree in co-relation 105384. Up to 10909 conditions per place. [2024-05-12 13:13:18,015 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 490 selfloop transitions, 37 changer transitions 0/548 dead transitions. [2024-05-12 13:13:18,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 548 transitions, 10040 flow [2024-05-12 13:13:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:13:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:13:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-05-12 13:13:18,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-05-12 13:13:18,016 INFO L175 Difference]: Start difference. First operand has 315 places, 483 transitions, 8592 flow. Second operand 10 states and 248 transitions. [2024-05-12 13:13:18,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 548 transitions, 10040 flow [2024-05-12 13:13:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 548 transitions, 9756 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:19,541 INFO L231 Difference]: Finished difference. Result has 321 places, 487 transitions, 8492 flow [2024-05-12 13:13:19,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8308, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8492, PETRI_PLACES=321, PETRI_TRANSITIONS=487} [2024-05-12 13:13:19,543 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 267 predicate places. [2024-05-12 13:13:19,543 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 487 transitions, 8492 flow [2024-05-12 13:13:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:19,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:19,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:19,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:13:19,543 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:19,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash 419875397, now seen corresponding path program 1 times [2024-05-12 13:13:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:19,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684160546] [2024-05-12 13:13:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:19,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:20,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:20,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684160546] [2024-05-12 13:13:20,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684160546] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:20,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:20,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847404518] [2024-05-12 13:13:20,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:20,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:20,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 487 transitions, 8492 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:20,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:20,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:20,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:24,067 INFO L124 PetriNetUnfolderBase]: 8127/13471 cut-off events. [2024-05-12 13:13:24,068 INFO L125 PetriNetUnfolderBase]: For 663463/663469 co-relation queries the response was YES. [2024-05-12 13:13:24,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108263 conditions, 13471 events. 8127/13471 cut-off events. For 663463/663469 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 97850 event pairs, 2227 based on Foata normal form. 6/13144 useless extension candidates. Maximal degree in co-relation 108112. Up to 11747 conditions per place. [2024-05-12 13:13:24,283 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 486 selfloop transitions, 43 changer transitions 0/538 dead transitions. [2024-05-12 13:13:24,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 538 transitions, 10113 flow [2024-05-12 13:13:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 13:13:24,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:13:24,295 INFO L175 Difference]: Start difference. First operand has 321 places, 487 transitions, 8492 flow. Second operand 7 states and 168 transitions. [2024-05-12 13:13:24,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 538 transitions, 10113 flow [2024-05-12 13:13:25,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 538 transitions, 9979 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-05-12 13:13:25,716 INFO L231 Difference]: Finished difference. Result has 322 places, 505 transitions, 8765 flow [2024-05-12 13:13:25,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8358, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8765, PETRI_PLACES=322, PETRI_TRANSITIONS=505} [2024-05-12 13:13:25,716 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 268 predicate places. [2024-05-12 13:13:25,717 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 505 transitions, 8765 flow [2024-05-12 13:13:25,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:25,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:25,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:25,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:13:25,717 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:25,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash 426511877, now seen corresponding path program 2 times [2024-05-12 13:13:25,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:25,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435257946] [2024-05-12 13:13:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:26,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435257946] [2024-05-12 13:13:26,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435257946] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:26,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:26,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892262130] [2024-05-12 13:13:26,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:26,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:26,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 505 transitions, 8765 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:26,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:26,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:26,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:29,933 INFO L124 PetriNetUnfolderBase]: 8161/13542 cut-off events. [2024-05-12 13:13:29,934 INFO L125 PetriNetUnfolderBase]: For 672531/672537 co-relation queries the response was YES. [2024-05-12 13:13:30,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109757 conditions, 13542 events. 8161/13542 cut-off events. For 672531/672537 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 98591 event pairs, 2236 based on Foata normal form. 6/13211 useless extension candidates. Maximal degree in co-relation 109604. Up to 11874 conditions per place. [2024-05-12 13:13:30,348 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 488 selfloop transitions, 40 changer transitions 0/537 dead transitions. [2024-05-12 13:13:30,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 537 transitions, 10075 flow [2024-05-12 13:13:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-05-12 13:13:30,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-05-12 13:13:30,350 INFO L175 Difference]: Start difference. First operand has 322 places, 505 transitions, 8765 flow. Second operand 7 states and 161 transitions. [2024-05-12 13:13:30,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 537 transitions, 10075 flow [2024-05-12 13:13:31,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 537 transitions, 9924 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:31,377 INFO L231 Difference]: Finished difference. Result has 327 places, 510 transitions, 8817 flow [2024-05-12 13:13:31,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8660, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8817, PETRI_PLACES=327, PETRI_TRANSITIONS=510} [2024-05-12 13:13:31,378 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 273 predicate places. [2024-05-12 13:13:31,378 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 510 transitions, 8817 flow [2024-05-12 13:13:31,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:31,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:31,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:13:31,379 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:31,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash 426520774, now seen corresponding path program 1 times [2024-05-12 13:13:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373049995] [2024-05-12 13:13:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:32,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:32,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373049995] [2024-05-12 13:13:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373049995] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:32,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:13:32,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166798897] [2024-05-12 13:13:32,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:32,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:13:32,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:13:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:13:32,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:32,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 510 transitions, 8817 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:32,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:32,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:32,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:35,925 INFO L124 PetriNetUnfolderBase]: 8229/13584 cut-off events. [2024-05-12 13:13:35,925 INFO L125 PetriNetUnfolderBase]: For 686701/686701 co-relation queries the response was YES. [2024-05-12 13:13:36,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110232 conditions, 13584 events. 8229/13584 cut-off events. For 686701/686701 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 98260 event pairs, 2162 based on Foata normal form. 4/13258 useless extension candidates. Maximal degree in co-relation 110077. Up to 11377 conditions per place. [2024-05-12 13:13:36,169 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 424 selfloop transitions, 128 changer transitions 0/561 dead transitions. [2024-05-12 13:13:36,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 561 transitions, 10475 flow [2024-05-12 13:13:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:13:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:13:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:13:36,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-05-12 13:13:36,172 INFO L175 Difference]: Start difference. First operand has 327 places, 510 transitions, 8817 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:13:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 561 transitions, 10475 flow [2024-05-12 13:13:37,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 561 transitions, 10374 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-05-12 13:13:37,683 INFO L231 Difference]: Finished difference. Result has 331 places, 516 transitions, 9099 flow [2024-05-12 13:13:37,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9099, PETRI_PLACES=331, PETRI_TRANSITIONS=516} [2024-05-12 13:13:37,685 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 277 predicate places. [2024-05-12 13:13:37,685 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 516 transitions, 9099 flow [2024-05-12 13:13:37,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:37,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:37,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:13:37,686 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:37,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1842164291, now seen corresponding path program 4 times [2024-05-12 13:13:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:37,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637786921] [2024-05-12 13:13:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637786921] [2024-05-12 13:13:39,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637786921] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:39,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:39,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:13:39,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918867037] [2024-05-12 13:13:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:39,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:13:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:13:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:13:39,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:13:39,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 516 transitions, 9099 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:39,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:39,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:13:39,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:42,744 INFO L124 PetriNetUnfolderBase]: 8065/13448 cut-off events. [2024-05-12 13:13:42,745 INFO L125 PetriNetUnfolderBase]: For 733212/733306 co-relation queries the response was YES. [2024-05-12 13:13:42,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111970 conditions, 13448 events. 8065/13448 cut-off events. For 733212/733306 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 98353 event pairs, 1843 based on Foata normal form. 24/13075 useless extension candidates. Maximal degree in co-relation 111814. Up to 11127 conditions per place. [2024-05-12 13:13:42,977 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 492 selfloop transitions, 61 changer transitions 0/581 dead transitions. [2024-05-12 13:13:42,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 581 transitions, 10637 flow [2024-05-12 13:13:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:13:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:13:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-05-12 13:13:42,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-05-12 13:13:42,978 INFO L175 Difference]: Start difference. First operand has 331 places, 516 transitions, 9099 flow. Second operand 10 states and 250 transitions. [2024-05-12 13:13:42,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 581 transitions, 10637 flow [2024-05-12 13:13:44,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 581 transitions, 10513 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 13:13:44,771 INFO L231 Difference]: Finished difference. Result has 338 places, 520 transitions, 9227 flow [2024-05-12 13:13:44,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9227, PETRI_PLACES=338, PETRI_TRANSITIONS=520} [2024-05-12 13:13:44,772 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 284 predicate places. [2024-05-12 13:13:44,772 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 520 transitions, 9227 flow [2024-05-12 13:13:44,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:44,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:44,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:44,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:13:44,773 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:44,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash -729376805, now seen corresponding path program 5 times [2024-05-12 13:13:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:44,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999125468] [2024-05-12 13:13:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat