./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix011_tso.oepc.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/mix011_tso.oepc.i ./goblint.2024-05-07_14-17-48.files/protection/mix011_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:07:42,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:07:42,287 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:07:42,291 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:07:42,292 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:07:42,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:07:42,320 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:07:42,321 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:07:42,321 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:07:42,324 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:07:42,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:07:42,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:07:42,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:07:42,326 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:07:42,327 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:07:42,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:07:42,327 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:07:42,327 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:07:42,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:07:42,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:07:42,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:07:42,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:07:42,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:07:42,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:07:42,329 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:07:42,329 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:07:42,330 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:07:42,330 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:07:42,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:07:42,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:07:42,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:07:42,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:07:42,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:07:42,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:07:42,332 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:07:42,332 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:07:42,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:07:42,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:07:42,333 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:07:42,333 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:07:42,334 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:07:42,334 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:07:42,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:07:42,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:07:42,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:07:42,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:07:42,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:07:42,590 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:07:42,590 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:07:42,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-05-12 13:07:43,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:07:43,886 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:07:43,886 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-05-12 13:07:43,899 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4a1d4b6/c4d16bf876244f2e93732a00f57d32fd/FLAGedb3646ab [2024-05-12 13:07:43,910 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4a1d4b6/c4d16bf876244f2e93732a00f57d32fd [2024-05-12 13:07:43,913 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:07:43,913 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:07:43,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix011_tso.oepc.yml/witness.yml [2024-05-12 13:07:44,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:07:44,082 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:07:44,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:07:44,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:07:44,086 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:07:44,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:07:43" (1/2) ... [2024-05-12 13:07:44,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d18ba30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:07:44, skipping insertion in model container [2024-05-12 13:07:44,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:07:43" (1/2) ... [2024-05-12 13:07:44,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@81ed2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:07:44, skipping insertion in model container [2024-05-12 13:07:44,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:07:44" (2/2) ... [2024-05-12 13:07:44,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d18ba30 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:07:44, skipping insertion in model container [2024-05-12 13:07:44,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:07:44" (2/2) ... [2024-05-12 13:07:44,091 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:07:44,166 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:07:44,167 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:07:44,167 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:07:44,167 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:07:44,168 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:07:44,168 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-05-12 13:07:44,208 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:07:44,420 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/mix011_tso.oepc.i[949,962] [2024-05-12 13:07:44,572 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:07:44,584 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:07:44,611 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/mix011_tso.oepc.i[949,962] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:07:44,672 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:07:44,701 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:07:44,702 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:07:44 WrapperNode [2024-05-12 13:07:44,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:07:44,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:07:44,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:07:44,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:07:44,708 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,719 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,754 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 159 [2024-05-12 13:07:44,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:07:44,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:07:44,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:07:44,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:07:44,763 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,763 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,767 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,780 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 13:07:44,780 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,781 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,788 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,790 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,791 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,793 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:07:44,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:07:44,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:07:44,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:07:44,797 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 01:07:44" (1/1) ... [2024-05-12 13:07:44,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:07:44,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:07:44,865 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 13:07:44,874 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 13:07:44,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:07:44,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:07:44,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:07:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:07:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:07:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:07:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:07:44,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:07:44,898 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:07:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:07:44,898 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:07:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:07:44,899 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:07:44,899 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:07:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:07:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:07:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:07:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:07:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:07:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:07:44,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:07:44,903 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 13:07:45,044 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:07:45,047 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:07:45,334 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:07:45,334 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:07:45,498 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:07:45,498 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:07:45,499 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:07:45 BoogieIcfgContainer [2024-05-12 13:07:45,499 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:07:45,501 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:07:45,501 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:07:45,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:07:45,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:07:43" (1/4) ... [2024-05-12 13:07:45,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6f8f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:07:45, skipping insertion in model container [2024-05-12 13:07:45,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:07:44" (2/4) ... [2024-05-12 13:07:45,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6f8f44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:07:45, skipping insertion in model container [2024-05-12 13:07:45,505 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 01:07:44" (3/4) ... [2024-05-12 13:07:45,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6f8f44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:07:45, skipping insertion in model container [2024-05-12 13:07:45,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:07:45" (4/4) ... [2024-05-12 13:07:45,507 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_tso.oepc.i [2024-05-12 13:07:45,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:07:45,522 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:07:45,522 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:07:45,572 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:07:45,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:07:45,642 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-05-12 13:07:45,643 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:07:45,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-05-12 13:07:45,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:07:45,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-05-12 13:07:45,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:07:45,670 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7abff0ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:07:45,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:07:45,674 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:07:45,674 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:07:45,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:07:45,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:45,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:07:45,676 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 13:07:45,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1826813411, now seen corresponding path program 1 times [2024-05-12 13:07:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:45,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705777760] [2024-05-12 13:07:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:46,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:46,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705777760] [2024-05-12 13:07:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705777760] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:46,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:07:46,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576346630] [2024-05-12 13:07:46,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:46,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:07:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:46,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:07:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:07:46,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:46,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:46,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:46,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:46,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:47,692 INFO L124 PetriNetUnfolderBase]: 4271/7016 cut-off events. [2024-05-12 13:07:47,692 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-05-12 13:07:47,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13262 conditions, 7016 events. 4271/7016 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 46242 event pairs, 3544 based on Foata normal form. 211/6587 useless extension candidates. Maximal degree in co-relation 13247. Up to 6128 conditions per place. [2024-05-12 13:07:47,733 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 45 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-05-12 13:07:47,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 239 flow [2024-05-12 13:07:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:07:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:07:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-05-12 13:07:47,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-05-12 13:07:47,745 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 100 transitions. [2024-05-12 13:07:47,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 239 flow [2024-05-12 13:07:47,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 234 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:47,750 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-05-12 13:07:47,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-05-12 13:07:47,755 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 13:07:47,755 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-05-12 13:07:47,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:47,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:47,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:47,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:07:47,756 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 13:07:47,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:47,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1073954492, now seen corresponding path program 1 times [2024-05-12 13:07:47,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:47,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921178021] [2024-05-12 13:07:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:48,532 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 13:07:48,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:48,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921178021] [2024-05-12 13:07:48,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921178021] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:48,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:48,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:07:48,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832428785] [2024-05-12 13:07:48,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:48,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:07:48,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:07:48,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:07:48,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:48,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:48,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:48,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:48,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:49,348 INFO L124 PetriNetUnfolderBase]: 5125/7765 cut-off events. [2024-05-12 13:07:49,348 INFO L125 PetriNetUnfolderBase]: For 1039/1039 co-relation queries the response was YES. [2024-05-12 13:07:49,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16847 conditions, 7765 events. 5125/7765 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 47567 event pairs, 2807 based on Foata normal form. 3/7361 useless extension candidates. Maximal degree in co-relation 16832. Up to 7290 conditions per place. [2024-05-12 13:07:49,387 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 58 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-05-12 13:07:49,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 339 flow [2024-05-12 13:07:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:07:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:07:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-05-12 13:07:49,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-05-12 13:07:49,390 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 4 states and 126 transitions. [2024-05-12 13:07:49,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 339 flow [2024-05-12 13:07:49,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:07:49,392 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 181 flow [2024-05-12 13:07:49,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-05-12 13:07:49,393 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-05-12 13:07:49,393 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 181 flow [2024-05-12 13:07:49,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:49,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:49,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:49,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:07:49,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:49,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1067148480, now seen corresponding path program 1 times [2024-05-12 13:07:49,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:49,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589513645] [2024-05-12 13:07:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:50,216 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 13:07:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:50,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589513645] [2024-05-12 13:07:50,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589513645] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:50,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:50,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:07:50,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139681482] [2024-05-12 13:07:50,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:50,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:07:50,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:07:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:07:50,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:50,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:50,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:50,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:51,003 INFO L124 PetriNetUnfolderBase]: 5109/8273 cut-off events. [2024-05-12 13:07:51,004 INFO L125 PetriNetUnfolderBase]: For 2931/2931 co-relation queries the response was YES. [2024-05-12 13:07:51,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 8273 events. 5109/8273 cut-off events. For 2931/2931 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 54958 event pairs, 2438 based on Foata normal form. 6/7678 useless extension candidates. Maximal degree in co-relation 18908. Up to 7239 conditions per place. [2024-05-12 13:07:51,102 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 70 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-05-12 13:07:51,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 97 transitions, 498 flow [2024-05-12 13:07:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:07:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:07:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-05-12 13:07:51,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-05-12 13:07:51,106 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 181 flow. Second operand 5 states and 151 transitions. [2024-05-12 13:07:51,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 97 transitions, 498 flow [2024-05-12 13:07:51,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 13:07:51,111 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 304 flow [2024-05-12 13:07:51,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2024-05-12 13:07:51,112 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-05-12 13:07:51,112 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 304 flow [2024-05-12 13:07:51,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:51,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:51,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:51,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:07:51,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:51,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1067305946, now seen corresponding path program 1 times [2024-05-12 13:07:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:51,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824683881] [2024-05-12 13:07:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:51,198 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 13:07:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824683881] [2024-05-12 13:07:51,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824683881] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:51,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:51,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:07:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832837268] [2024-05-12 13:07:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:07:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:07:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:07:51,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2024-05-12 13:07:51,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:51,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:51,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2024-05-12 13:07:51,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:51,451 INFO L124 PetriNetUnfolderBase]: 1239/2581 cut-off events. [2024-05-12 13:07:51,451 INFO L125 PetriNetUnfolderBase]: For 1284/1436 co-relation queries the response was YES. [2024-05-12 13:07:51,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5510 conditions, 2581 events. 1239/2581 cut-off events. For 1284/1436 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19468 event pairs, 618 based on Foata normal form. 21/2417 useless extension candidates. Maximal degree in co-relation 5490. Up to 1578 conditions per place. [2024-05-12 13:07:51,466 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 37 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2024-05-12 13:07:51,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 379 flow [2024-05-12 13:07:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:07:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:07:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-05-12 13:07:51,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7466666666666667 [2024-05-12 13:07:51,468 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 304 flow. Second operand 3 states and 112 transitions. [2024-05-12 13:07:51,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 379 flow [2024-05-12 13:07:51,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 371 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-05-12 13:07:51,470 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 267 flow [2024-05-12 13:07:51,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-05-12 13:07:51,471 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-05-12 13:07:51,471 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 267 flow [2024-05-12 13:07:51,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:51,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:51,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:51,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:07:51,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:51,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1249963131, now seen corresponding path program 1 times [2024-05-12 13:07:51,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:51,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887425378] [2024-05-12 13:07:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:51,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:52,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:52,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887425378] [2024-05-12 13:07:52,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887425378] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:52,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:52,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600340698] [2024-05-12 13:07:52,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:52,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:52,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:52,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:52,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:52,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:52,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:52,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:53,645 INFO L124 PetriNetUnfolderBase]: 4332/7038 cut-off events. [2024-05-12 13:07:53,645 INFO L125 PetriNetUnfolderBase]: For 6250/6250 co-relation queries the response was YES. [2024-05-12 13:07:53,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17309 conditions, 7038 events. 4332/7038 cut-off events. For 6250/6250 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 45459 event pairs, 1768 based on Foata normal form. 6/6782 useless extension candidates. Maximal degree in co-relation 17287. Up to 6106 conditions per place. [2024-05-12 13:07:53,678 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 72 selfloop transitions, 16 changer transitions 1/100 dead transitions. [2024-05-12 13:07:53,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 543 flow [2024-05-12 13:07:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 13:07:53,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-05-12 13:07:53,683 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 267 flow. Second operand 6 states and 170 transitions. [2024-05-12 13:07:53,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 543 flow [2024-05-12 13:07:53,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:07:53,691 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 309 flow [2024-05-12 13:07:53,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-05-12 13:07:53,693 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-05-12 13:07:53,693 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 309 flow [2024-05-12 13:07:53,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:53,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:53,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:53,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:07:53,694 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 13:07:53,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash 814810171, now seen corresponding path program 1 times [2024-05-12 13:07:53,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:53,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545015862] [2024-05-12 13:07:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:53,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:54,543 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 13:07:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545015862] [2024-05-12 13:07:54,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545015862] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:54,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:54,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:07:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851677085] [2024-05-12 13:07:54,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:54,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:07:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:07:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:07:54,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:54,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 309 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:54,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:54,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:54,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:55,264 INFO L124 PetriNetUnfolderBase]: 3603/6015 cut-off events. [2024-05-12 13:07:55,264 INFO L125 PetriNetUnfolderBase]: For 6883/6883 co-relation queries the response was YES. [2024-05-12 13:07:55,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 6015 events. 3603/6015 cut-off events. For 6883/6883 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 38714 event pairs, 1918 based on Foata normal form. 2/5720 useless extension candidates. Maximal degree in co-relation 15493. Up to 5169 conditions per place. [2024-05-12 13:07:55,299 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 69 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-05-12 13:07:55,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 559 flow [2024-05-12 13:07:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:07:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:07:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-05-12 13:07:55,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-05-12 13:07:55,301 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 309 flow. Second operand 5 states and 129 transitions. [2024-05-12 13:07:55,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 559 flow [2024-05-12 13:07:55,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 511 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:55,305 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 354 flow [2024-05-12 13:07:55,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-05-12 13:07:55,306 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-05-12 13:07:55,306 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 354 flow [2024-05-12 13:07:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:55,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:55,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:55,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:07:55,307 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 13:07:55,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash -510687352, now seen corresponding path program 1 times [2024-05-12 13:07:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:55,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884491439] [2024-05-12 13:07:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:55,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:56,228 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 13:07:56,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884491439] [2024-05-12 13:07:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884491439] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:56,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:56,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:56,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269008904] [2024-05-12 13:07:56,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:56,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:56,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:56,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:56,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:56,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:56,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:56,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:57,101 INFO L124 PetriNetUnfolderBase]: 4252/7131 cut-off events. [2024-05-12 13:07:57,101 INFO L125 PetriNetUnfolderBase]: For 10600/10600 co-relation queries the response was YES. [2024-05-12 13:07:57,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19288 conditions, 7131 events. 4252/7131 cut-off events. For 10600/10600 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 46664 event pairs, 2284 based on Foata normal form. 2/6847 useless extension candidates. Maximal degree in co-relation 19262. Up to 6064 conditions per place. [2024-05-12 13:07:57,135 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 79 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2024-05-12 13:07:57,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 630 flow [2024-05-12 13:07:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-05-12 13:07:57,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:07:57,137 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 354 flow. Second operand 6 states and 150 transitions. [2024-05-12 13:07:57,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 630 flow [2024-05-12 13:07:57,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 613 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 13:07:57,143 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 395 flow [2024-05-12 13:07:57,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2024-05-12 13:07:57,143 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-05-12 13:07:57,143 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 395 flow [2024-05-12 13:07:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:57,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:57,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:57,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:07:57,144 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 13:07:57,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1342809818, now seen corresponding path program 1 times [2024-05-12 13:07:57,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:57,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368712908] [2024-05-12 13:07:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:57,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:58,057 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 13:07:58,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:58,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368712908] [2024-05-12 13:07:58,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368712908] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:58,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:58,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:58,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122674188] [2024-05-12 13:07:58,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:58,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:58,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:58,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:58,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 395 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:58,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:58,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:58,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:59,276 INFO L124 PetriNetUnfolderBase]: 4880/8054 cut-off events. [2024-05-12 13:07:59,276 INFO L125 PetriNetUnfolderBase]: For 16542/16542 co-relation queries the response was YES. [2024-05-12 13:07:59,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23052 conditions, 8054 events. 4880/8054 cut-off events. For 16542/16542 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 52793 event pairs, 2544 based on Foata normal form. 2/7783 useless extension candidates. Maximal degree in co-relation 23024. Up to 6952 conditions per place. [2024-05-12 13:07:59,323 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 84 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-05-12 13:07:59,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 707 flow [2024-05-12 13:07:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-05-12 13:07:59,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2024-05-12 13:07:59,325 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 395 flow. Second operand 6 states and 151 transitions. [2024-05-12 13:07:59,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 707 flow [2024-05-12 13:07:59,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 675 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:59,332 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 464 flow [2024-05-12 13:07:59,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=464, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-05-12 13:07:59,333 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-05-12 13:07:59,333 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 464 flow [2024-05-12 13:07:59,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:59,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:59,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:59,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:07:59,333 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 13:07:59,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1348553498, now seen corresponding path program 2 times [2024-05-12 13:07:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:59,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237411319] [2024-05-12 13:07:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:00,348 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 13:08:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237411319] [2024-05-12 13:08:00,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237411319] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:00,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:00,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:08:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487863573] [2024-05-12 13:08:00,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:00,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:08:00,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:08:00,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:08:00,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:00,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 464 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:00,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:00,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:01,289 INFO L124 PetriNetUnfolderBase]: 4855/7996 cut-off events. [2024-05-12 13:08:01,289 INFO L125 PetriNetUnfolderBase]: For 21443/21467 co-relation queries the response was YES. [2024-05-12 13:08:01,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24351 conditions, 7996 events. 4855/7996 cut-off events. For 21443/21467 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 52435 event pairs, 2411 based on Foata normal form. 18/7758 useless extension candidates. Maximal degree in co-relation 24321. Up to 6877 conditions per place. [2024-05-12 13:08:01,345 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 82 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-05-12 13:08:01,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 770 flow [2024-05-12 13:08:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:08:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:08:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-05-12 13:08:01,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-05-12 13:08:01,347 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 464 flow. Second operand 6 states and 152 transitions. [2024-05-12 13:08:01,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 770 flow [2024-05-12 13:08:01,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 111 transitions, 737 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:01,357 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 509 flow [2024-05-12 13:08:01,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-05-12 13:08:01,358 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-05-12 13:08:01,358 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 509 flow [2024-05-12 13:08:01,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:01,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:01,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:01,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:08:01,361 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 13:08:01,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1348562426, now seen corresponding path program 1 times [2024-05-12 13:08:01,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:01,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733611027] [2024-05-12 13:08:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:01,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:02,488 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 13:08:02,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:02,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733611027] [2024-05-12 13:08:02,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733611027] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:02,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:02,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:02,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240745269] [2024-05-12 13:08:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:02,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:02,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:02,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:02,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 509 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:02,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:02,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:02,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:03,432 INFO L124 PetriNetUnfolderBase]: 4284/7238 cut-off events. [2024-05-12 13:08:03,433 INFO L125 PetriNetUnfolderBase]: For 22957/22957 co-relation queries the response was YES. [2024-05-12 13:08:03,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22978 conditions, 7238 events. 4284/7238 cut-off events. For 22957/22957 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 47919 event pairs, 2161 based on Foata normal form. 2/6982 useless extension candidates. Maximal degree in co-relation 22947. Up to 6089 conditions per place. [2024-05-12 13:08:03,486 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 98 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-05-12 13:08:03,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 869 flow [2024-05-12 13:08:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-05-12 13:08:03,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:08:03,488 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 509 flow. Second operand 7 states and 175 transitions. [2024-05-12 13:08:03,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 869 flow [2024-05-12 13:08:03,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 123 transitions, 817 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:03,499 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 529 flow [2024-05-12 13:08:03,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=529, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-05-12 13:08:03,500 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-05-12 13:08:03,500 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 529 flow [2024-05-12 13:08:03,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:03,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:03,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:03,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:08:03,501 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 13:08:03,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:03,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1322688596, now seen corresponding path program 1 times [2024-05-12 13:08:03,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:03,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555551001] [2024-05-12 13:08:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:03,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:04,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555551001] [2024-05-12 13:08:04,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555551001] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:04,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:04,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:04,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187212502] [2024-05-12 13:08:04,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:04,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:04,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:04,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:04,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 529 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:04,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:04,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:04,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:05,466 INFO L124 PetriNetUnfolderBase]: 4923/8148 cut-off events. [2024-05-12 13:08:05,466 INFO L125 PetriNetUnfolderBase]: For 32681/32689 co-relation queries the response was YES. [2024-05-12 13:08:05,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 8148 events. 4923/8148 cut-off events. For 32681/32689 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 53651 event pairs, 2118 based on Foata normal form. 12/7884 useless extension candidates. Maximal degree in co-relation 27189. Up to 6951 conditions per place. [2024-05-12 13:08:05,518 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 93 selfloop transitions, 29 changer transitions 0/133 dead transitions. [2024-05-12 13:08:05,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 133 transitions, 930 flow [2024-05-12 13:08:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 13:08:05,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:08:05,520 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 529 flow. Second operand 7 states and 182 transitions. [2024-05-12 13:08:05,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 133 transitions, 930 flow [2024-05-12 13:08:05,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 884 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:05,533 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 630 flow [2024-05-12 13:08:05,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-05-12 13:08:05,533 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-05-12 13:08:05,534 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 630 flow [2024-05-12 13:08:05,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:05,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:05,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:05,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:08:05,534 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 13:08:05,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1322567696, now seen corresponding path program 2 times [2024-05-12 13:08:05,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:05,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345272923] [2024-05-12 13:08:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:05,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:06,550 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 13:08:06,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:06,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345272923] [2024-05-12 13:08:06,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345272923] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:06,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:06,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:06,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304297715] [2024-05-12 13:08:06,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:06,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:06,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:06,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 630 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:06,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:07,618 INFO L124 PetriNetUnfolderBase]: 4996/8218 cut-off events. [2024-05-12 13:08:07,619 INFO L125 PetriNetUnfolderBase]: For 41562/41570 co-relation queries the response was YES. [2024-05-12 13:08:07,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29883 conditions, 8218 events. 4996/8218 cut-off events. For 41562/41570 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 53794 event pairs, 2050 based on Foata normal form. 12/7948 useless extension candidates. Maximal degree in co-relation 29849. Up to 6980 conditions per place. [2024-05-12 13:08:07,663 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 98 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-05-12 13:08:07,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 146 transitions, 1166 flow [2024-05-12 13:08:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 13:08:07,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2024-05-12 13:08:07,665 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 630 flow. Second operand 7 states and 183 transitions. [2024-05-12 13:08:07,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 146 transitions, 1166 flow [2024-05-12 13:08:07,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 146 transitions, 1101 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:07,680 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 795 flow [2024-05-12 13:08:07,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2024-05-12 13:08:07,681 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-05-12 13:08:07,681 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 795 flow [2024-05-12 13:08:07,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:07,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:07,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:07,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:08:07,681 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:07,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -949105595, now seen corresponding path program 1 times [2024-05-12 13:08:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722711811] [2024-05-12 13:08:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:07,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:08,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:08,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722711811] [2024-05-12 13:08:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722711811] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:08,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:08,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:08,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589729660] [2024-05-12 13:08:08,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:08,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:08,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:08,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:08,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:08,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 795 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:08,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:08,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:08,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:09,869 INFO L124 PetriNetUnfolderBase]: 5291/8546 cut-off events. [2024-05-12 13:08:09,870 INFO L125 PetriNetUnfolderBase]: For 50047/50047 co-relation queries the response was YES. [2024-05-12 13:08:09,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32760 conditions, 8546 events. 5291/8546 cut-off events. For 50047/50047 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 54515 event pairs, 2203 based on Foata normal form. 2/8288 useless extension candidates. Maximal degree in co-relation 32724. Up to 7487 conditions per place. [2024-05-12 13:08:09,915 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 119 selfloop transitions, 19 changer transitions 0/147 dead transitions. [2024-05-12 13:08:09,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 147 transitions, 1222 flow [2024-05-12 13:08:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:08:09,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-05-12 13:08:09,917 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 795 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:08:09,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 147 transitions, 1222 flow [2024-05-12 13:08:09,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 147 transitions, 1134 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:09,943 INFO L231 Difference]: Finished difference. Result has 93 places, 111 transitions, 802 flow [2024-05-12 13:08:09,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=93, PETRI_TRANSITIONS=111} [2024-05-12 13:08:09,944 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-05-12 13:08:09,944 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 111 transitions, 802 flow [2024-05-12 13:08:09,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:09,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:09,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:09,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:08:09,945 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 13:08:09,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1144513616, now seen corresponding path program 3 times [2024-05-12 13:08:09,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:09,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382433236] [2024-05-12 13:08:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:11,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:11,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382433236] [2024-05-12 13:08:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382433236] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652350678] [2024-05-12 13:08:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:11,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:11,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:11,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 111 transitions, 802 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:11,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:11,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:11,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:12,118 INFO L124 PetriNetUnfolderBase]: 5010/8310 cut-off events. [2024-05-12 13:08:12,118 INFO L125 PetriNetUnfolderBase]: For 56306/56358 co-relation queries the response was YES. [2024-05-12 13:08:12,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32447 conditions, 8310 events. 5010/8310 cut-off events. For 56306/56358 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 55071 event pairs, 1938 based on Foata normal form. 17/8047 useless extension candidates. Maximal degree in co-relation 32410. Up to 6927 conditions per place. [2024-05-12 13:08:12,184 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 102 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-05-12 13:08:12,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 165 transitions, 1468 flow [2024-05-12 13:08:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 13:08:12,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:08:12,187 INFO L175 Difference]: Start difference. First operand has 93 places, 111 transitions, 802 flow. Second operand 7 states and 182 transitions. [2024-05-12 13:08:12,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 165 transitions, 1468 flow [2024-05-12 13:08:12,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 165 transitions, 1409 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:12,220 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1115 flow [2024-05-12 13:08:12,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1115, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2024-05-12 13:08:12,220 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-05-12 13:08:12,221 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1115 flow [2024-05-12 13:08:12,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 13:08:12,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:12,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:12,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:08:12,221 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 13:08:12,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1144513399, now seen corresponding path program 2 times [2024-05-12 13:08:12,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:12,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099589490] [2024-05-12 13:08:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:12,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:13,108 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 13:08:13,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:13,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099589490] [2024-05-12 13:08:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099589490] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:13,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097111073] [2024-05-12 13:08:13,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:13,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:13,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:13,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1115 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:13,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:13,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:13,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:14,162 INFO L124 PetriNetUnfolderBase]: 5315/8630 cut-off events. [2024-05-12 13:08:14,162 INFO L125 PetriNetUnfolderBase]: For 68844/68871 co-relation queries the response was YES. [2024-05-12 13:08:14,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36192 conditions, 8630 events. 5315/8630 cut-off events. For 68844/68871 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 55593 event pairs, 2150 based on Foata normal form. 20/8386 useless extension candidates. Maximal degree in co-relation 36152. Up to 7426 conditions per place. [2024-05-12 13:08:14,309 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 132 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2024-05-12 13:08:14,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 176 transitions, 1759 flow [2024-05-12 13:08:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-05-12 13:08:14,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:08:14,312 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1115 flow. Second operand 7 states and 175 transitions. [2024-05-12 13:08:14,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 176 transitions, 1759 flow [2024-05-12 13:08:14,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 176 transitions, 1641 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-05-12 13:08:14,344 INFO L231 Difference]: Finished difference. Result has 102 places, 135 transitions, 1184 flow [2024-05-12 13:08:14,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1184, PETRI_PLACES=102, PETRI_TRANSITIONS=135} [2024-05-12 13:08:14,344 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-05-12 13:08:14,344 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 135 transitions, 1184 flow [2024-05-12 13:08:14,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:14,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:14,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:14,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:08:14,345 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 13:08:14,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash -290723773, now seen corresponding path program 3 times [2024-05-12 13:08:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:14,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180295906] [2024-05-12 13:08:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:15,310 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 13:08:15,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:15,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180295906] [2024-05-12 13:08:15,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180295906] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:15,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:15,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582685705] [2024-05-12 13:08:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:15,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:15,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:15,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 135 transitions, 1184 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:15,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:15,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:15,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:16,553 INFO L124 PetriNetUnfolderBase]: 5310/8612 cut-off events. [2024-05-12 13:08:16,554 INFO L125 PetriNetUnfolderBase]: For 76477/76504 co-relation queries the response was YES. [2024-05-12 13:08:16,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37238 conditions, 8612 events. 5310/8612 cut-off events. For 76477/76504 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 55304 event pairs, 2151 based on Foata normal form. 20/8372 useless extension candidates. Maximal degree in co-relation 37196. Up to 7421 conditions per place. [2024-05-12 13:08:16,617 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 127 selfloop transitions, 37 changer transitions 0/173 dead transitions. [2024-05-12 13:08:16,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 173 transitions, 1654 flow [2024-05-12 13:08:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:08:16,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:08:16,619 INFO L175 Difference]: Start difference. First operand has 102 places, 135 transitions, 1184 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:08:16,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 173 transitions, 1654 flow [2024-05-12 13:08:16,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 1564 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:16,689 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1176 flow [2024-05-12 13:08:16,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1176, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2024-05-12 13:08:16,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-05-12 13:08:16,690 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1176 flow [2024-05-12 13:08:16,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:16,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:16,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:08:16,691 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:16,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1727735454, now seen corresponding path program 1 times [2024-05-12 13:08:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:16,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096813295] [2024-05-12 13:08:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:17,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:17,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096813295] [2024-05-12 13:08:17,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096813295] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:17,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:17,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:08:17,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629151352] [2024-05-12 13:08:17,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:17,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:08:17,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:17,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:08:17,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:08:17,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:17,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1176 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:17,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:17,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:17,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:18,501 INFO L124 PetriNetUnfolderBase]: 5827/9512 cut-off events. [2024-05-12 13:08:18,501 INFO L125 PetriNetUnfolderBase]: For 88817/88883 co-relation queries the response was YES. [2024-05-12 13:08:18,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40905 conditions, 9512 events. 5827/9512 cut-off events. For 88817/88883 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 62164 event pairs, 2500 based on Foata normal form. 7/9208 useless extension candidates. Maximal degree in co-relation 40861. Up to 8275 conditions per place. [2024-05-12 13:08:18,563 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 127 selfloop transitions, 14 changer transitions 0/154 dead transitions. [2024-05-12 13:08:18,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1532 flow [2024-05-12 13:08:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:08:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:08:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-05-12 13:08:18,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476 [2024-05-12 13:08:18,565 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1176 flow. Second operand 5 states and 119 transitions. [2024-05-12 13:08:18,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1532 flow [2024-05-12 13:08:18,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1444 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:18,629 INFO L231 Difference]: Finished difference. Result has 105 places, 138 transitions, 1154 flow [2024-05-12 13:08:18,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1154, PETRI_PLACES=105, PETRI_TRANSITIONS=138} [2024-05-12 13:08:18,629 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-05-12 13:08:18,629 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 138 transitions, 1154 flow [2024-05-12 13:08:18,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:18,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:18,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:18,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:08:18,630 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:18,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1946236281, now seen corresponding path program 1 times [2024-05-12 13:08:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:18,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916155259] [2024-05-12 13:08:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:19,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916155259] [2024-05-12 13:08:19,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916155259] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:19,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:19,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921099585] [2024-05-12 13:08:19,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:19,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:19,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:19,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:19,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 138 transitions, 1154 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 13:08:19,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:19,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:19,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:21,116 INFO L124 PetriNetUnfolderBase]: 5476/9015 cut-off events. [2024-05-12 13:08:21,117 INFO L125 PetriNetUnfolderBase]: For 93233/93297 co-relation queries the response was YES. [2024-05-12 13:08:21,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40346 conditions, 9015 events. 5476/9015 cut-off events. For 93233/93297 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 60301 event pairs, 2188 based on Foata normal form. 10/8663 useless extension candidates. Maximal degree in co-relation 40301. Up to 7631 conditions per place. [2024-05-12 13:08:21,180 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 131 selfloop transitions, 37 changer transitions 0/183 dead transitions. [2024-05-12 13:08:21,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 183 transitions, 1694 flow [2024-05-12 13:08:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 13:08:21,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2024-05-12 13:08:21,182 INFO L175 Difference]: Start difference. First operand has 105 places, 138 transitions, 1154 flow. Second operand 7 states and 183 transitions. [2024-05-12 13:08:21,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 183 transitions, 1694 flow [2024-05-12 13:08:21,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 183 transitions, 1580 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:21,259 INFO L231 Difference]: Finished difference. Result has 110 places, 147 transitions, 1257 flow [2024-05-12 13:08:21,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1257, PETRI_PLACES=110, PETRI_TRANSITIONS=147} [2024-05-12 13:08:21,259 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-05-12 13:08:21,259 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 147 transitions, 1257 flow [2024-05-12 13:08:21,260 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 13:08:21,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:21,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:08:21,260 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 13:08:21,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash -658856315, now seen corresponding path program 1 times [2024-05-12 13:08:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:21,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609948268] [2024-05-12 13:08:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:22,208 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 13:08:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:22,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609948268] [2024-05-12 13:08:22,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609948268] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:22,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:22,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854618699] [2024-05-12 13:08:22,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:22,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:22,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:22,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:22,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 147 transitions, 1257 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:22,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:22,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:22,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:23,537 INFO L124 PetriNetUnfolderBase]: 5802/9370 cut-off events. [2024-05-12 13:08:23,538 INFO L125 PetriNetUnfolderBase]: For 99625/99625 co-relation queries the response was YES. [2024-05-12 13:08:23,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42585 conditions, 9370 events. 5802/9370 cut-off events. For 99625/99625 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 60959 event pairs, 2314 based on Foata normal form. 4/9039 useless extension candidates. Maximal degree in co-relation 42538. Up to 8065 conditions per place. [2024-05-12 13:08:23,610 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 148 selfloop transitions, 37 changer transitions 0/195 dead transitions. [2024-05-12 13:08:23,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 195 transitions, 1811 flow [2024-05-12 13:08:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:08:23,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:08:23,612 INFO L175 Difference]: Start difference. First operand has 110 places, 147 transitions, 1257 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:08:23,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 195 transitions, 1811 flow [2024-05-12 13:08:23,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 1755 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:23,687 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1350 flow [2024-05-12 13:08:23,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1350, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-05-12 13:08:23,688 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-05-12 13:08:23,688 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1350 flow [2024-05-12 13:08:23,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:23,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:23,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:23,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:08:23,689 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 13:08:23,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash 642498781, now seen corresponding path program 1 times [2024-05-12 13:08:23,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:23,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135445876] [2024-05-12 13:08:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:23,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:24,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135445876] [2024-05-12 13:08:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135445876] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212619773] [2024-05-12 13:08:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:24,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:24,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:24,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1350 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:24,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:24,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:24,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:25,953 INFO L124 PetriNetUnfolderBase]: 5830/9426 cut-off events. [2024-05-12 13:08:25,954 INFO L125 PetriNetUnfolderBase]: For 111909/111909 co-relation queries the response was YES. [2024-05-12 13:08:25,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44498 conditions, 9426 events. 5830/9426 cut-off events. For 111909/111909 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 61404 event pairs, 2268 based on Foata normal form. 2/9091 useless extension candidates. Maximal degree in co-relation 44450. Up to 8163 conditions per place. [2024-05-12 13:08:26,033 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 167 selfloop transitions, 22 changer transitions 0/199 dead transitions. [2024-05-12 13:08:26,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 199 transitions, 1938 flow [2024-05-12 13:08:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-05-12 13:08:26,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-05-12 13:08:26,054 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1350 flow. Second operand 8 states and 194 transitions. [2024-05-12 13:08:26,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 199 transitions, 1938 flow [2024-05-12 13:08:26,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 199 transitions, 1819 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:26,142 INFO L231 Difference]: Finished difference. Result has 117 places, 154 transitions, 1341 flow [2024-05-12 13:08:26,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1341, PETRI_PLACES=117, PETRI_TRANSITIONS=154} [2024-05-12 13:08:26,143 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-05-12 13:08:26,143 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 154 transitions, 1341 flow [2024-05-12 13:08:26,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:26,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:26,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:26,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:08:26,144 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 13:08:26,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash 642498533, now seen corresponding path program 2 times [2024-05-12 13:08:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:26,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320753473] [2024-05-12 13:08:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:26,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:27,161 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 13:08:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320753473] [2024-05-12 13:08:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320753473] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:27,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:27,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410992905] [2024-05-12 13:08:27,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:27,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:27,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:27,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 154 transitions, 1341 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:27,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:27,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:27,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:28,450 INFO L124 PetriNetUnfolderBase]: 5929/9556 cut-off events. [2024-05-12 13:08:28,451 INFO L125 PetriNetUnfolderBase]: For 126310/126310 co-relation queries the response was YES. [2024-05-12 13:08:28,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46536 conditions, 9556 events. 5929/9556 cut-off events. For 126310/126310 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 62073 event pairs, 2220 based on Foata normal form. 4/9224 useless extension candidates. Maximal degree in co-relation 46487. Up to 8074 conditions per place. [2024-05-12 13:08:28,530 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 142 selfloop transitions, 59 changer transitions 0/211 dead transitions. [2024-05-12 13:08:28,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 211 transitions, 2135 flow [2024-05-12 13:08:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:08:28,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-05-12 13:08:28,532 INFO L175 Difference]: Start difference. First operand has 117 places, 154 transitions, 1341 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:08:28,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 211 transitions, 2135 flow [2024-05-12 13:08:28,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 211 transitions, 2054 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:28,631 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1603 flow [2024-05-12 13:08:28,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1603, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-05-12 13:08:28,631 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-05-12 13:08:28,631 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1603 flow [2024-05-12 13:08:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:28,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:28,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:28,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:08:28,632 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 13:08:28,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -663440503, now seen corresponding path program 3 times [2024-05-12 13:08:28,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:28,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965129961] [2024-05-12 13:08:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:28,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:29,587 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 13:08:29,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:29,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965129961] [2024-05-12 13:08:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965129961] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:29,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:29,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:29,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606073983] [2024-05-12 13:08:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:29,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:29,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:29,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:29,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1603 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:29,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:29,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:29,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:30,972 INFO L124 PetriNetUnfolderBase]: 5935/9531 cut-off events. [2024-05-12 13:08:30,972 INFO L125 PetriNetUnfolderBase]: For 144194/144200 co-relation queries the response was YES. [2024-05-12 13:08:31,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48775 conditions, 9531 events. 5935/9531 cut-off events. For 144194/144200 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 61546 event pairs, 2216 based on Foata normal form. 4/9202 useless extension candidates. Maximal degree in co-relation 48724. Up to 8079 conditions per place. [2024-05-12 13:08:31,053 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 144 selfloop transitions, 61 changer transitions 0/215 dead transitions. [2024-05-12 13:08:31,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 215 transitions, 2307 flow [2024-05-12 13:08:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:08:31,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-05-12 13:08:31,055 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1603 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:08:31,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 215 transitions, 2307 flow [2024-05-12 13:08:31,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 215 transitions, 2170 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:31,191 INFO L231 Difference]: Finished difference. Result has 124 places, 170 transitions, 1677 flow [2024-05-12 13:08:31,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1677, PETRI_PLACES=124, PETRI_TRANSITIONS=170} [2024-05-12 13:08:31,192 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-05-12 13:08:31,192 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 170 transitions, 1677 flow [2024-05-12 13:08:31,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:31,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:31,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:08:31,192 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 13:08:31,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash -430782185, now seen corresponding path program 4 times [2024-05-12 13:08:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:31,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80097051] [2024-05-12 13:08:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:32,160 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 13:08:32,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:32,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80097051] [2024-05-12 13:08:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80097051] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:32,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:32,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792404110] [2024-05-12 13:08:32,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:32,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:32,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:32,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 170 transitions, 1677 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:32,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:32,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:32,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:33,683 INFO L124 PetriNetUnfolderBase]: 5919/9564 cut-off events. [2024-05-12 13:08:33,683 INFO L125 PetriNetUnfolderBase]: For 150181/150205 co-relation queries the response was YES. [2024-05-12 13:08:33,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49152 conditions, 9564 events. 5919/9564 cut-off events. For 150181/150205 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 62301 event pairs, 2098 based on Foata normal form. 13/9250 useless extension candidates. Maximal degree in co-relation 49099. Up to 7865 conditions per place. [2024-05-12 13:08:33,751 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 137 selfloop transitions, 93 changer transitions 0/240 dead transitions. [2024-05-12 13:08:33,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 240 transitions, 2819 flow [2024-05-12 13:08:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:08:33,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:08:33,752 INFO L175 Difference]: Start difference. First operand has 124 places, 170 transitions, 1677 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:08:33,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 240 transitions, 2819 flow [2024-05-12 13:08:33,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 240 transitions, 2679 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:33,894 INFO L231 Difference]: Finished difference. Result has 129 places, 195 transitions, 2207 flow [2024-05-12 13:08:33,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2207, PETRI_PLACES=129, PETRI_TRANSITIONS=195} [2024-05-12 13:08:33,894 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-05-12 13:08:33,895 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 195 transitions, 2207 flow [2024-05-12 13:08:33,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:33,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:33,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:33,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:08:33,895 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 13:08:33,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1120175847, now seen corresponding path program 2 times [2024-05-12 13:08:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:33,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635180306] [2024-05-12 13:08:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:33,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:34,876 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 13:08:34,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635180306] [2024-05-12 13:08:34,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635180306] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:34,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:34,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:34,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082379533] [2024-05-12 13:08:34,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:34,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:34,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:34,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:34,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:34,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:34,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 195 transitions, 2207 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:34,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:34,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:34,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:36,303 INFO L124 PetriNetUnfolderBase]: 5982/9655 cut-off events. [2024-05-12 13:08:36,303 INFO L125 PetriNetUnfolderBase]: For 171660/171693 co-relation queries the response was YES. [2024-05-12 13:08:36,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52351 conditions, 9655 events. 5982/9655 cut-off events. For 171660/171693 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 62863 event pairs, 2161 based on Foata normal form. 24/9349 useless extension candidates. Maximal degree in co-relation 52295. Up to 8213 conditions per place. [2024-05-12 13:08:36,381 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 191 selfloop transitions, 53 changer transitions 0/254 dead transitions. [2024-05-12 13:08:36,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 254 transitions, 3194 flow [2024-05-12 13:08:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-05-12 13:08:36,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025 [2024-05-12 13:08:36,383 INFO L175 Difference]: Start difference. First operand has 129 places, 195 transitions, 2207 flow. Second operand 8 states and 201 transitions. [2024-05-12 13:08:36,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 254 transitions, 3194 flow [2024-05-12 13:08:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 254 transitions, 2976 flow, removed 97 selfloop flow, removed 2 redundant places. [2024-05-12 13:08:36,559 INFO L231 Difference]: Finished difference. Result has 135 places, 201 transitions, 2268 flow [2024-05-12 13:08:36,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2268, PETRI_PLACES=135, PETRI_TRANSITIONS=201} [2024-05-12 13:08:36,560 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-05-12 13:08:36,560 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 201 transitions, 2268 flow [2024-05-12 13:08:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:36,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:36,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:36,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:08:36,560 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:36,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1120176095, now seen corresponding path program 5 times [2024-05-12 13:08:36,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:36,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607472622] [2024-05-12 13:08:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:37,580 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 13:08:37,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:37,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607472622] [2024-05-12 13:08:37,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607472622] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:37,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:37,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:37,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611730490] [2024-05-12 13:08:37,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:37,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:37,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:37,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:37,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 201 transitions, 2268 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:37,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:37,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:37,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:39,118 INFO L124 PetriNetUnfolderBase]: 5998/9688 cut-off events. [2024-05-12 13:08:39,118 INFO L125 PetriNetUnfolderBase]: For 176986/177010 co-relation queries the response was YES. [2024-05-12 13:08:39,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52475 conditions, 9688 events. 5998/9688 cut-off events. For 176986/177010 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 63113 event pairs, 2098 based on Foata normal form. 13/9372 useless extension candidates. Maximal degree in co-relation 52417. Up to 7951 conditions per place. [2024-05-12 13:08:39,203 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 146 selfloop transitions, 99 changer transitions 0/255 dead transitions. [2024-05-12 13:08:39,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 255 transitions, 3186 flow [2024-05-12 13:08:39,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:08:39,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:08:39,205 INFO L175 Difference]: Start difference. First operand has 135 places, 201 transitions, 2268 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:08:39,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 255 transitions, 3186 flow [2024-05-12 13:08:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 255 transitions, 3082 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:39,376 INFO L231 Difference]: Finished difference. Result has 140 places, 209 transitions, 2490 flow [2024-05-12 13:08:39,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2490, PETRI_PLACES=140, PETRI_TRANSITIONS=209} [2024-05-12 13:08:39,376 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-05-12 13:08:39,376 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 209 transitions, 2490 flow [2024-05-12 13:08:39,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:39,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:39,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:39,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:08:39,377 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 13:08:39,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1111901885, now seen corresponding path program 6 times [2024-05-12 13:08:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:39,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112504726] [2024-05-12 13:08:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:40,473 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 13:08:40,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:40,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112504726] [2024-05-12 13:08:40,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112504726] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:40,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:40,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:40,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244684] [2024-05-12 13:08:40,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:40,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:40,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:40,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 209 transitions, 2490 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:40,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:40,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:40,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:41,841 INFO L124 PetriNetUnfolderBase]: 5988/9682 cut-off events. [2024-05-12 13:08:41,842 INFO L125 PetriNetUnfolderBase]: For 182905/182929 co-relation queries the response was YES. [2024-05-12 13:08:41,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53002 conditions, 9682 events. 5988/9682 cut-off events. For 182905/182929 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 63218 event pairs, 2074 based on Foata normal form. 13/9363 useless extension candidates. Maximal degree in co-relation 52941. Up to 7943 conditions per place. [2024-05-12 13:08:41,917 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 138 selfloop transitions, 104 changer transitions 0/252 dead transitions. [2024-05-12 13:08:41,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 252 transitions, 3206 flow [2024-05-12 13:08:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:08:41,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-05-12 13:08:41,919 INFO L175 Difference]: Start difference. First operand has 140 places, 209 transitions, 2490 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:08:41,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 252 transitions, 3206 flow [2024-05-12 13:08:42,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 252 transitions, 2944 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:42,128 INFO L231 Difference]: Finished difference. Result has 144 places, 209 transitions, 2446 flow [2024-05-12 13:08:42,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2446, PETRI_PLACES=144, PETRI_TRANSITIONS=209} [2024-05-12 13:08:42,129 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-05-12 13:08:42,129 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 209 transitions, 2446 flow [2024-05-12 13:08:42,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:42,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:42,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:42,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:08:42,130 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 13:08:42,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1111901637, now seen corresponding path program 3 times [2024-05-12 13:08:42,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:42,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217707297] [2024-05-12 13:08:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:42,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:43,130 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 13:08:43,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:43,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217707297] [2024-05-12 13:08:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217707297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:43,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240515256] [2024-05-12 13:08:43,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:43,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:43,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 209 transitions, 2446 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:43,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:43,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:43,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:44,568 INFO L124 PetriNetUnfolderBase]: 6043/9733 cut-off events. [2024-05-12 13:08:44,569 INFO L125 PetriNetUnfolderBase]: For 188167/188200 co-relation queries the response was YES. [2024-05-12 13:08:44,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53490 conditions, 9733 events. 6043/9733 cut-off events. For 188167/188200 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 63247 event pairs, 2156 based on Foata normal form. 24/9430 useless extension candidates. Maximal degree in co-relation 53428. Up to 8288 conditions per place. [2024-05-12 13:08:44,650 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 197 selfloop transitions, 58 changer transitions 0/265 dead transitions. [2024-05-12 13:08:44,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 265 transitions, 3391 flow [2024-05-12 13:08:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:08:44,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:08:44,651 INFO L175 Difference]: Start difference. First operand has 144 places, 209 transitions, 2446 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:08:44,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 265 transitions, 3391 flow [2024-05-12 13:08:44,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 265 transitions, 3141 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:44,872 INFO L231 Difference]: Finished difference. Result has 145 places, 212 transitions, 2406 flow [2024-05-12 13:08:44,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2406, PETRI_PLACES=145, PETRI_TRANSITIONS=212} [2024-05-12 13:08:44,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-05-12 13:08:44,873 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 212 transitions, 2406 flow [2024-05-12 13:08:44,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:44,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:44,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:44,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:08:44,874 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 13:08:44,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash 787522051, now seen corresponding path program 4 times [2024-05-12 13:08:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854447641] [2024-05-12 13:08:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:44,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:45,812 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 13:08:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854447641] [2024-05-12 13:08:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854447641] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:45,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:45,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:45,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111099445] [2024-05-12 13:08:45,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:45,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:45,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 212 transitions, 2406 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:45,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:45,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:45,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:47,213 INFO L124 PetriNetUnfolderBase]: 6038/9726 cut-off events. [2024-05-12 13:08:47,213 INFO L125 PetriNetUnfolderBase]: For 194325/194358 co-relation queries the response was YES. [2024-05-12 13:08:47,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53396 conditions, 9726 events. 6038/9726 cut-off events. For 194325/194358 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 63143 event pairs, 2156 based on Foata normal form. 24/9423 useless extension candidates. Maximal degree in co-relation 53334. Up to 8283 conditions per place. [2024-05-12 13:08:47,301 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 190 selfloop transitions, 62 changer transitions 0/262 dead transitions. [2024-05-12 13:08:47,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 262 transitions, 3144 flow [2024-05-12 13:08:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 13:08:47,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-05-12 13:08:47,304 INFO L175 Difference]: Start difference. First operand has 145 places, 212 transitions, 2406 flow. Second operand 8 states and 197 transitions. [2024-05-12 13:08:47,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 262 transitions, 3144 flow [2024-05-12 13:08:47,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 262 transitions, 2944 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:47,541 INFO L231 Difference]: Finished difference. Result has 147 places, 212 transitions, 2338 flow [2024-05-12 13:08:47,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2338, PETRI_PLACES=147, PETRI_TRANSITIONS=212} [2024-05-12 13:08:47,542 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-05-12 13:08:47,542 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 212 transitions, 2338 flow [2024-05-12 13:08:47,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:47,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:47,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:47,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:08:47,543 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 13:08:47,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1111594055, now seen corresponding path program 1 times [2024-05-12 13:08:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:47,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439923658] [2024-05-12 13:08:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:47,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:48,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:48,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439923658] [2024-05-12 13:08:48,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439923658] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:48,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:48,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923631001] [2024-05-12 13:08:48,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:48,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:48,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:48,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:48,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 212 transitions, 2338 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:08:48,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:48,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:48,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:50,399 INFO L124 PetriNetUnfolderBase]: 5907/9782 cut-off events. [2024-05-12 13:08:50,399 INFO L125 PetriNetUnfolderBase]: For 197921/197921 co-relation queries the response was YES. [2024-05-12 13:08:50,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52860 conditions, 9782 events. 5907/9782 cut-off events. For 197921/197921 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 65477 event pairs, 2096 based on Foata normal form. 2/9410 useless extension candidates. Maximal degree in co-relation 52797. Up to 8266 conditions per place. [2024-05-12 13:08:50,482 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 223 selfloop transitions, 40 changer transitions 0/273 dead transitions. [2024-05-12 13:08:50,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 273 transitions, 3263 flow [2024-05-12 13:08:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-05-12 13:08:50,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-05-12 13:08:50,485 INFO L175 Difference]: Start difference. First operand has 147 places, 212 transitions, 2338 flow. Second operand 9 states and 213 transitions. [2024-05-12 13:08:50,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 273 transitions, 3263 flow [2024-05-12 13:08:50,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 273 transitions, 3115 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:50,688 INFO L231 Difference]: Finished difference. Result has 151 places, 229 transitions, 2571 flow [2024-05-12 13:08:50,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2571, PETRI_PLACES=151, PETRI_TRANSITIONS=229} [2024-05-12 13:08:50,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-05-12 13:08:50,690 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 229 transitions, 2571 flow [2024-05-12 13:08:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:08:50,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:50,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:50,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:08:50,691 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:50,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2020189521, now seen corresponding path program 1 times [2024-05-12 13:08:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:50,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613736717] [2024-05-12 13:08:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:51,470 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 13:08:51,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:51,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613736717] [2024-05-12 13:08:51,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613736717] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:51,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:08:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790471573] [2024-05-12 13:08:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:08:51,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:08:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:08:51,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:08:51,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 229 transitions, 2571 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 13:08:51,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:51,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:08:51,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:53,074 INFO L124 PetriNetUnfolderBase]: 6210/10085 cut-off events. [2024-05-12 13:08:53,074 INFO L125 PetriNetUnfolderBase]: For 217351/217447 co-relation queries the response was YES. [2024-05-12 13:08:53,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56069 conditions, 10085 events. 6210/10085 cut-off events. For 217351/217447 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 65726 event pairs, 2372 based on Foata normal form. 25/9785 useless extension candidates. Maximal degree in co-relation 56003. Up to 8687 conditions per place. [2024-05-12 13:08:53,182 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 211 selfloop transitions, 17 changer transitions 0/255 dead transitions. [2024-05-12 13:08:53,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 255 transitions, 3153 flow [2024-05-12 13:08:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:08:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:08:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-05-12 13:08:53,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-05-12 13:08:53,184 INFO L175 Difference]: Start difference. First operand has 151 places, 229 transitions, 2571 flow. Second operand 6 states and 141 transitions. [2024-05-12 13:08:53,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 255 transitions, 3153 flow [2024-05-12 13:08:53,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 255 transitions, 2719 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:53,404 INFO L231 Difference]: Finished difference. Result has 151 places, 232 transitions, 2215 flow [2024-05-12 13:08:53,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2215, PETRI_PLACES=151, PETRI_TRANSITIONS=232} [2024-05-12 13:08:53,405 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-05-12 13:08:53,405 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 232 transitions, 2215 flow [2024-05-12 13:08:53,406 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 13:08:53,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:53,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:53,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:08:53,406 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 13:08:53,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash 203722155, now seen corresponding path program 1 times [2024-05-12 13:08:53,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:53,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976533479] [2024-05-12 13:08:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:53,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:54,671 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 13:08:54,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:54,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976533479] [2024-05-12 13:08:54,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976533479] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:54,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:54,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:54,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719146848] [2024-05-12 13:08:54,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:54,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:54,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:54,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:54,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 232 transitions, 2215 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 13:08:54,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:54,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:54,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:56,519 INFO L124 PetriNetUnfolderBase]: 6433/10454 cut-off events. [2024-05-12 13:08:56,519 INFO L125 PetriNetUnfolderBase]: For 247043/247125 co-relation queries the response was YES. [2024-05-12 13:08:56,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60142 conditions, 10454 events. 6433/10454 cut-off events. For 247043/247125 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 69657 event pairs, 1901 based on Foata normal form. 29/10117 useless extension candidates. Maximal degree in co-relation 60075. Up to 8828 conditions per place. [2024-05-12 13:08:56,628 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 216 selfloop transitions, 36 changer transitions 0/282 dead transitions. [2024-05-12 13:08:56,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 282 transitions, 2923 flow [2024-05-12 13:08:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:08:56,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-05-12 13:08:56,630 INFO L175 Difference]: Start difference. First operand has 151 places, 232 transitions, 2215 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:08:56,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 282 transitions, 2923 flow [2024-05-12 13:08:56,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 282 transitions, 2867 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:56,816 INFO L231 Difference]: Finished difference. Result has 156 places, 239 transitions, 2350 flow [2024-05-12 13:08:56,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2350, PETRI_PLACES=156, PETRI_TRANSITIONS=239} [2024-05-12 13:08:56,817 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-05-12 13:08:56,817 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 239 transitions, 2350 flow [2024-05-12 13:08:56,817 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 13:08:56,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:56,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:08:56,818 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 13:08:56,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash 203783535, now seen corresponding path program 2 times [2024-05-12 13:08:56,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998156173] [2024-05-12 13:08:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:56,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:58,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:58,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998156173] [2024-05-12 13:08:58,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998156173] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:58,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:58,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:58,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370080315] [2024-05-12 13:08:58,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:58,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:58,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:58,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:58,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 239 transitions, 2350 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 13:08:58,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:58,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:58,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:59,922 INFO L124 PetriNetUnfolderBase]: 6472/10536 cut-off events. [2024-05-12 13:08:59,922 INFO L125 PetriNetUnfolderBase]: For 266730/266814 co-relation queries the response was YES. [2024-05-12 13:08:59,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62055 conditions, 10536 events. 6472/10536 cut-off events. For 266730/266814 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 70430 event pairs, 2240 based on Foata normal form. 29/10188 useless extension candidates. Maximal degree in co-relation 61986. Up to 8876 conditions per place. [2024-05-12 13:09:00,048 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 216 selfloop transitions, 40 changer transitions 0/286 dead transitions. [2024-05-12 13:09:00,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 286 transitions, 3066 flow [2024-05-12 13:09:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:09:00,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:09:00,050 INFO L175 Difference]: Start difference. First operand has 156 places, 239 transitions, 2350 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:09:00,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 286 transitions, 3066 flow [2024-05-12 13:09:00,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 286 transitions, 2931 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:00,340 INFO L231 Difference]: Finished difference. Result has 159 places, 242 transitions, 2386 flow [2024-05-12 13:09:00,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2386, PETRI_PLACES=159, PETRI_TRANSITIONS=242} [2024-05-12 13:09:00,341 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-05-12 13:09:00,341 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 242 transitions, 2386 flow [2024-05-12 13:09:00,341 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 13:09:00,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:00,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:00,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:09:00,342 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 13:09:00,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1676598650, now seen corresponding path program 1 times [2024-05-12 13:09:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:00,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093232583] [2024-05-12 13:09:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:01,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:01,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093232583] [2024-05-12 13:09:01,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093232583] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:01,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:01,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:01,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569319950] [2024-05-12 13:09:01,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:01,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:01,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:01,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:01,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:01,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 242 transitions, 2386 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:01,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:01,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:03,498 INFO L124 PetriNetUnfolderBase]: 6778/10933 cut-off events. [2024-05-12 13:09:03,498 INFO L125 PetriNetUnfolderBase]: For 284528/284535 co-relation queries the response was YES. [2024-05-12 13:09:03,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64922 conditions, 10933 events. 6778/10933 cut-off events. For 284528/284535 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 72331 event pairs, 2334 based on Foata normal form. 9/10562 useless extension candidates. Maximal degree in co-relation 64852. Up to 9386 conditions per place. [2024-05-12 13:09:03,602 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 234 selfloop transitions, 47 changer transitions 0/292 dead transitions. [2024-05-12 13:09:03,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 292 transitions, 3186 flow [2024-05-12 13:09:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:09:03,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-05-12 13:09:03,605 INFO L175 Difference]: Start difference. First operand has 159 places, 242 transitions, 2386 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:09:03,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 292 transitions, 3186 flow [2024-05-12 13:09:03,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 292 transitions, 2967 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:03,855 INFO L231 Difference]: Finished difference. Result has 162 places, 248 transitions, 2411 flow [2024-05-12 13:09:03,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2411, PETRI_PLACES=162, PETRI_TRANSITIONS=248} [2024-05-12 13:09:03,856 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-05-12 13:09:03,856 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 248 transitions, 2411 flow [2024-05-12 13:09:03,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:03,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:03,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:03,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:09:03,856 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:03,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1673767513, now seen corresponding path program 1 times [2024-05-12 13:09:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:03,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57826727] [2024-05-12 13:09:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:03,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:04,848 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 13:09:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:04,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57826727] [2024-05-12 13:09:04,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57826727] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:04,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:04,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008597319] [2024-05-12 13:09:04,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:04,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:04,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:04,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 248 transitions, 2411 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:04,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:04,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:04,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:06,703 INFO L124 PetriNetUnfolderBase]: 6808/10930 cut-off events. [2024-05-12 13:09:06,704 INFO L125 PetriNetUnfolderBase]: For 295066/295073 co-relation queries the response was YES. [2024-05-12 13:09:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65279 conditions, 10930 events. 6808/10930 cut-off events. For 295066/295073 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 71815 event pairs, 2281 based on Foata normal form. 11/10581 useless extension candidates. Maximal degree in co-relation 65207. Up to 9422 conditions per place. [2024-05-12 13:09:06,829 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 252 selfloop transitions, 41 changer transitions 0/304 dead transitions. [2024-05-12 13:09:06,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 304 transitions, 3245 flow [2024-05-12 13:09:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:09:06,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49777777777777776 [2024-05-12 13:09:06,831 INFO L175 Difference]: Start difference. First operand has 162 places, 248 transitions, 2411 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:09:06,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 304 transitions, 3245 flow [2024-05-12 13:09:07,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 304 transitions, 3161 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:07,106 INFO L231 Difference]: Finished difference. Result has 166 places, 252 transitions, 2514 flow [2024-05-12 13:09:07,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2514, PETRI_PLACES=166, PETRI_TRANSITIONS=252} [2024-05-12 13:09:07,107 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-05-12 13:09:07,107 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 252 transitions, 2514 flow [2024-05-12 13:09:07,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:07,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:07,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:07,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:09:07,108 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:07,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash 322793775, now seen corresponding path program 3 times [2024-05-12 13:09:07,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:07,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317499695] [2024-05-12 13:09:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:07,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:08,428 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 13:09:08,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:08,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317499695] [2024-05-12 13:09:08,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317499695] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:08,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:08,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:08,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224629873] [2024-05-12 13:09:08,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:08,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:08,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:08,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:08,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 252 transitions, 2514 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 13:09:08,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:08,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:08,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:10,437 INFO L124 PetriNetUnfolderBase]: 6525/10617 cut-off events. [2024-05-12 13:09:10,437 INFO L125 PetriNetUnfolderBase]: For 318530/318624 co-relation queries the response was YES. [2024-05-12 13:09:10,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65674 conditions, 10617 events. 6525/10617 cut-off events. For 318530/318624 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 70919 event pairs, 2178 based on Foata normal form. 43/10285 useless extension candidates. Maximal degree in co-relation 65601. Up to 8912 conditions per place. [2024-05-12 13:09:10,536 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 216 selfloop transitions, 51 changer transitions 0/298 dead transitions. [2024-05-12 13:09:10,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 298 transitions, 3270 flow [2024-05-12 13:09:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:09:10,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:09:10,538 INFO L175 Difference]: Start difference. First operand has 166 places, 252 transitions, 2514 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:09:10,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 298 transitions, 3270 flow [2024-05-12 13:09:10,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 298 transitions, 3113 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-05-12 13:09:10,800 INFO L231 Difference]: Finished difference. Result has 167 places, 255 transitions, 2559 flow [2024-05-12 13:09:10,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2559, PETRI_PLACES=167, PETRI_TRANSITIONS=255} [2024-05-12 13:09:10,800 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-05-12 13:09:10,800 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 255 transitions, 2559 flow [2024-05-12 13:09:10,801 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 13:09:10,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:10,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:10,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:09:10,801 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:10,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash 322799727, now seen corresponding path program 2 times [2024-05-12 13:09:10,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:10,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521102576] [2024-05-12 13:09:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:10,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:11,943 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 13:09:11,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521102576] [2024-05-12 13:09:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521102576] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:11,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:11,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:11,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582805993] [2024-05-12 13:09:11,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:11,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:11,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:11,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:12,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:12,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 255 transitions, 2559 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:12,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:12,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:12,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:13,894 INFO L124 PetriNetUnfolderBase]: 7150/11478 cut-off events. [2024-05-12 13:09:13,895 INFO L125 PetriNetUnfolderBase]: For 361535/361556 co-relation queries the response was YES. [2024-05-12 13:09:13,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72736 conditions, 11478 events. 7150/11478 cut-off events. For 361535/361556 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 75775 event pairs, 2176 based on Foata normal form. 25/11120 useless extension candidates. Maximal degree in co-relation 72662. Up to 9458 conditions per place. [2024-05-12 13:09:14,009 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 237 selfloop transitions, 80 changer transitions 0/328 dead transitions. [2024-05-12 13:09:14,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 328 transitions, 3990 flow [2024-05-12 13:09:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 13:09:14,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-05-12 13:09:14,011 INFO L175 Difference]: Start difference. First operand has 167 places, 255 transitions, 2559 flow. Second operand 9 states and 233 transitions. [2024-05-12 13:09:14,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 328 transitions, 3990 flow [2024-05-12 13:09:14,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 328 transitions, 3812 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:14,335 INFO L231 Difference]: Finished difference. Result has 172 places, 271 transitions, 2968 flow [2024-05-12 13:09:14,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2968, PETRI_PLACES=172, PETRI_TRANSITIONS=271} [2024-05-12 13:09:14,336 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-05-12 13:09:14,336 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 271 transitions, 2968 flow [2024-05-12 13:09:14,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:14,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:14,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:14,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:09:14,337 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 13:09:14,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash 323008977, now seen corresponding path program 3 times [2024-05-12 13:09:14,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:14,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45763727] [2024-05-12 13:09:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:15,293 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 13:09:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:15,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45763727] [2024-05-12 13:09:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45763727] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:15,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653170748] [2024-05-12 13:09:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:15,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:15,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:15,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 271 transitions, 2968 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:15,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:15,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:15,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:17,365 INFO L124 PetriNetUnfolderBase]: 7188/11552 cut-off events. [2024-05-12 13:09:17,365 INFO L125 PetriNetUnfolderBase]: For 396642/396681 co-relation queries the response was YES. [2024-05-12 13:09:17,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76760 conditions, 11552 events. 7188/11552 cut-off events. For 396642/396681 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 76349 event pairs, 2145 based on Foata normal form. 47/11216 useless extension candidates. Maximal degree in co-relation 76683. Up to 9478 conditions per place. [2024-05-12 13:09:17,500 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 231 selfloop transitions, 88 changer transitions 0/330 dead transitions. [2024-05-12 13:09:17,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 330 transitions, 4048 flow [2024-05-12 13:09:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:09:17,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:09:17,502 INFO L175 Difference]: Start difference. First operand has 172 places, 271 transitions, 2968 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:09:17,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 330 transitions, 4048 flow [2024-05-12 13:09:18,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 330 transitions, 3891 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:18,004 INFO L231 Difference]: Finished difference. Result has 177 places, 275 transitions, 3113 flow [2024-05-12 13:09:18,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3113, PETRI_PLACES=177, PETRI_TRANSITIONS=275} [2024-05-12 13:09:18,005 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-05-12 13:09:18,005 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 275 transitions, 3113 flow [2024-05-12 13:09:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:18,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:18,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:09:18,006 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 13:09:18,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1055856059, now seen corresponding path program 4 times [2024-05-12 13:09:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:18,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066804921] [2024-05-12 13:09:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:19,003 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 13:09:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066804921] [2024-05-12 13:09:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066804921] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:19,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:19,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:19,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890393617] [2024-05-12 13:09:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:19,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:19,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:19,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 275 transitions, 3113 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:19,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:19,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:19,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:20,936 INFO L124 PetriNetUnfolderBase]: 7176/11527 cut-off events. [2024-05-12 13:09:20,937 INFO L125 PetriNetUnfolderBase]: For 398986/399041 co-relation queries the response was YES. [2024-05-12 13:09:21,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76847 conditions, 11527 events. 7176/11527 cut-off events. For 398986/399041 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 76124 event pairs, 2149 based on Foata normal form. 59/11206 useless extension candidates. Maximal degree in co-relation 76768. Up to 9471 conditions per place. [2024-05-12 13:09:21,061 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 233 selfloop transitions, 86 changer transitions 0/330 dead transitions. [2024-05-12 13:09:21,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 330 transitions, 4084 flow [2024-05-12 13:09:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 13:09:21,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-05-12 13:09:21,063 INFO L175 Difference]: Start difference. First operand has 177 places, 275 transitions, 3113 flow. Second operand 9 states and 230 transitions. [2024-05-12 13:09:21,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 330 transitions, 4084 flow [2024-05-12 13:09:21,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 330 transitions, 3748 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:21,608 INFO L231 Difference]: Finished difference. Result has 180 places, 275 transitions, 2958 flow [2024-05-12 13:09:21,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2958, PETRI_PLACES=180, PETRI_TRANSITIONS=275} [2024-05-12 13:09:21,609 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 124 predicate places. [2024-05-12 13:09:21,609 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 275 transitions, 2958 flow [2024-05-12 13:09:21,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:21,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:21,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:21,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:09:21,610 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:21,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1800825417, now seen corresponding path program 1 times [2024-05-12 13:09:21,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:21,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347753174] [2024-05-12 13:09:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:21,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:22,335 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 13:09:22,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:22,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347753174] [2024-05-12 13:09:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347753174] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:22,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:22,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:09:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849606545] [2024-05-12 13:09:22,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:22,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:09:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:09:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:09:22,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:09:22,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 275 transitions, 2958 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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 13:09:22,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:22,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:09:22,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:24,237 INFO L124 PetriNetUnfolderBase]: 7743/12144 cut-off events. [2024-05-12 13:09:24,237 INFO L125 PetriNetUnfolderBase]: For 418831/418934 co-relation queries the response was YES. [2024-05-12 13:09:24,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78880 conditions, 12144 events. 7743/12144 cut-off events. For 418831/418934 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 76897 event pairs, 2543 based on Foata normal form. 35/11806 useless extension candidates. Maximal degree in co-relation 78800. Up to 10800 conditions per place. [2024-05-12 13:09:24,370 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 259 selfloop transitions, 26 changer transitions 0/312 dead transitions. [2024-05-12 13:09:24,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 312 transitions, 3862 flow [2024-05-12 13:09:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:09:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:09:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-05-12 13:09:24,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 13:09:24,371 INFO L175 Difference]: Start difference. First operand has 180 places, 275 transitions, 2958 flow. Second operand 6 states and 144 transitions. [2024-05-12 13:09:24,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 312 transitions, 3862 flow [2024-05-12 13:09:24,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 312 transitions, 3702 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-05-12 13:09:24,850 INFO L231 Difference]: Finished difference. Result has 179 places, 281 transitions, 2952 flow [2024-05-12 13:09:24,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2952, PETRI_PLACES=179, PETRI_TRANSITIONS=281} [2024-05-12 13:09:24,852 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-05-12 13:09:24,852 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 281 transitions, 2952 flow [2024-05-12 13:09:24,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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 13:09:24,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:24,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:24,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:09:24,852 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:24,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1364243801, now seen corresponding path program 4 times [2024-05-12 13:09:24,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:24,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851252505] [2024-05-12 13:09:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:24,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:26,119 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 13:09:26,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:26,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851252505] [2024-05-12 13:09:26,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851252505] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:26,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:26,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:26,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915504270] [2024-05-12 13:09:26,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:26,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:26,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:26,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:26,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:26,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 281 transitions, 2952 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 13:09:26,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:26,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:26,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:28,114 INFO L124 PetriNetUnfolderBase]: 6793/10965 cut-off events. [2024-05-12 13:09:28,115 INFO L125 PetriNetUnfolderBase]: For 419920/420082 co-relation queries the response was YES. [2024-05-12 13:09:28,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74695 conditions, 10965 events. 6793/10965 cut-off events. For 419920/420082 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 72809 event pairs, 1880 based on Foata normal form. 30/10631 useless extension candidates. Maximal degree in co-relation 74614. Up to 9190 conditions per place. [2024-05-12 13:09:28,228 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 227 selfloop transitions, 65 changer transitions 0/325 dead transitions. [2024-05-12 13:09:28,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 325 transitions, 3772 flow [2024-05-12 13:09:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:09:28,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:09:28,230 INFO L175 Difference]: Start difference. First operand has 179 places, 281 transitions, 2952 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:09:28,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 325 transitions, 3772 flow [2024-05-12 13:09:28,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 325 transitions, 3714 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-05-12 13:09:28,677 INFO L231 Difference]: Finished difference. Result has 185 places, 284 transitions, 3134 flow [2024-05-12 13:09:28,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3134, PETRI_PLACES=185, PETRI_TRANSITIONS=284} [2024-05-12 13:09:28,678 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 129 predicate places. [2024-05-12 13:09:28,678 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 284 transitions, 3134 flow [2024-05-12 13:09:28,678 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 13:09:28,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:28,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:09:28,679 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 13:09:28,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1364237849, now seen corresponding path program 5 times [2024-05-12 13:09:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:28,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386381354] [2024-05-12 13:09:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:29,741 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 13:09:29,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386381354] [2024-05-12 13:09:29,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386381354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:29,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:29,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:29,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99325677] [2024-05-12 13:09:29,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:29,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:29,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:29,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:29,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 284 transitions, 3134 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:29,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:29,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:29,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:31,775 INFO L124 PetriNetUnfolderBase]: 7262/11458 cut-off events. [2024-05-12 13:09:31,776 INFO L125 PetriNetUnfolderBase]: For 456218/456307 co-relation queries the response was YES. [2024-05-12 13:09:31,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79493 conditions, 11458 events. 7262/11458 cut-off events. For 456218/456307 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 74195 event pairs, 2003 based on Foata normal form. 30/11159 useless extension candidates. Maximal degree in co-relation 79410. Up to 8997 conditions per place. [2024-05-12 13:09:31,902 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 209 selfloop transitions, 144 changer transitions 0/366 dead transitions. [2024-05-12 13:09:31,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 366 transitions, 4962 flow [2024-05-12 13:09:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-05-12 13:09:31,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311111111111111 [2024-05-12 13:09:31,904 INFO L175 Difference]: Start difference. First operand has 185 places, 284 transitions, 3134 flow. Second operand 9 states and 239 transitions. [2024-05-12 13:09:31,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 366 transitions, 4962 flow [2024-05-12 13:09:32,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 366 transitions, 4746 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:32,466 INFO L231 Difference]: Finished difference. Result has 190 places, 304 transitions, 3735 flow [2024-05-12 13:09:32,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3735, PETRI_PLACES=190, PETRI_TRANSITIONS=304} [2024-05-12 13:09:32,466 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 134 predicate places. [2024-05-12 13:09:32,466 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 304 transitions, 3735 flow [2024-05-12 13:09:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:32,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:32,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:32,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:09:32,467 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 13:09:32,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:32,467 INFO L85 PathProgramCache]: Analyzing trace with hash -100014703, now seen corresponding path program 6 times [2024-05-12 13:09:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191621491] [2024-05-12 13:09:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:32,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:33,523 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 13:09:33,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191621491] [2024-05-12 13:09:33,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191621491] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:33,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:33,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:33,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020683555] [2024-05-12 13:09:33,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:33,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:33,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:33,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 304 transitions, 3735 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:33,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:33,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:33,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:35,718 INFO L124 PetriNetUnfolderBase]: 7433/11722 cut-off events. [2024-05-12 13:09:35,719 INFO L125 PetriNetUnfolderBase]: For 511863/511955 co-relation queries the response was YES. [2024-05-12 13:09:35,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85972 conditions, 11722 events. 7433/11722 cut-off events. For 511863/511955 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 76120 event pairs, 1941 based on Foata normal form. 34/11427 useless extension candidates. Maximal degree in co-relation 85886. Up to 9124 conditions per place. [2024-05-12 13:09:35,865 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 198 selfloop transitions, 163 changer transitions 0/374 dead transitions. [2024-05-12 13:09:35,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 374 transitions, 5293 flow [2024-05-12 13:09:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:09:35,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-05-12 13:09:35,872 INFO L175 Difference]: Start difference. First operand has 190 places, 304 transitions, 3735 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:09:35,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 374 transitions, 5293 flow [2024-05-12 13:09:36,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 374 transitions, 4892 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:36,580 INFO L231 Difference]: Finished difference. Result has 195 places, 314 transitions, 3972 flow [2024-05-12 13:09:36,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3972, PETRI_PLACES=195, PETRI_TRANSITIONS=314} [2024-05-12 13:09:36,581 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 139 predicate places. [2024-05-12 13:09:36,582 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 314 transitions, 3972 flow [2024-05-12 13:09:36,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:36,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:36,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:36,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:09:36,583 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 13:09:36,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -109218913, now seen corresponding path program 7 times [2024-05-12 13:09:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:36,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933626620] [2024-05-12 13:09:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:36,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:37,631 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 13:09:37,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933626620] [2024-05-12 13:09:37,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933626620] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:37,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:37,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:37,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857720992] [2024-05-12 13:09:37,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:37,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:37,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:37,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:37,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:37,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 314 transitions, 3972 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:37,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:37,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:37,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:39,740 INFO L124 PetriNetUnfolderBase]: 7662/12048 cut-off events. [2024-05-12 13:09:39,740 INFO L125 PetriNetUnfolderBase]: For 525713/525805 co-relation queries the response was YES. [2024-05-12 13:09:39,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88466 conditions, 12048 events. 7662/12048 cut-off events. For 525713/525805 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 78189 event pairs, 1965 based on Foata normal form. 30/11746 useless extension candidates. Maximal degree in co-relation 88378. Up to 9278 conditions per place. [2024-05-12 13:09:39,886 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 209 selfloop transitions, 168 changer transitions 0/390 dead transitions. [2024-05-12 13:09:39,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 390 transitions, 5807 flow [2024-05-12 13:09:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:09:39,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-05-12 13:09:39,888 INFO L175 Difference]: Start difference. First operand has 195 places, 314 transitions, 3972 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:09:39,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 390 transitions, 5807 flow [2024-05-12 13:09:40,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 390 transitions, 5382 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:40,792 INFO L231 Difference]: Finished difference. Result has 200 places, 328 transitions, 4284 flow [2024-05-12 13:09:40,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4284, PETRI_PLACES=200, PETRI_TRANSITIONS=328} [2024-05-12 13:09:40,793 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 144 predicate places. [2024-05-12 13:09:40,793 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 328 transitions, 4284 flow [2024-05-12 13:09:40,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:40,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:40,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:40,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:09:40,794 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 13:09:40,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:40,794 INFO L85 PathProgramCache]: Analyzing trace with hash -109211473, now seen corresponding path program 8 times [2024-05-12 13:09:40,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:40,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339708291] [2024-05-12 13:09:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:40,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:41,829 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 13:09:41,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:41,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339708291] [2024-05-12 13:09:41,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339708291] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:41,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:41,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:41,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075628705] [2024-05-12 13:09:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:41,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:41,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:41,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:41,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 328 transitions, 4284 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:41,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:41,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:41,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:43,883 INFO L124 PetriNetUnfolderBase]: 7648/12046 cut-off events. [2024-05-12 13:09:43,883 INFO L125 PetriNetUnfolderBase]: For 531208/531300 co-relation queries the response was YES. [2024-05-12 13:09:43,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87624 conditions, 12046 events. 7648/12046 cut-off events. For 531208/531300 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 78294 event pairs, 1979 based on Foata normal form. 34/11748 useless extension candidates. Maximal degree in co-relation 87534. Up to 9274 conditions per place. [2024-05-12 13:09:44,056 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 214 selfloop transitions, 164 changer transitions 0/391 dead transitions. [2024-05-12 13:09:44,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 5794 flow [2024-05-12 13:09:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-05-12 13:09:44,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311111111111111 [2024-05-12 13:09:44,058 INFO L175 Difference]: Start difference. First operand has 200 places, 328 transitions, 4284 flow. Second operand 9 states and 239 transitions. [2024-05-12 13:09:44,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 5794 flow [2024-05-12 13:09:44,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 391 transitions, 5436 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:44,974 INFO L231 Difference]: Finished difference. Result has 205 places, 328 transitions, 4265 flow [2024-05-12 13:09:44,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4265, PETRI_PLACES=205, PETRI_TRANSITIONS=328} [2024-05-12 13:09:44,974 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-05-12 13:09:44,975 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 328 transitions, 4265 flow [2024-05-12 13:09:44,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:44,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:44,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:09:44,975 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 13:09:44,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash -365719423, now seen corresponding path program 9 times [2024-05-12 13:09:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:44,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170738034] [2024-05-12 13:09:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:46,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:46,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170738034] [2024-05-12 13:09:46,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170738034] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:46,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:46,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989621382] [2024-05-12 13:09:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:46,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:46,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:46,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:46,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:46,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:46,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 328 transitions, 4265 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:46,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:46,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:48,235 INFO L124 PetriNetUnfolderBase]: 7688/12084 cut-off events. [2024-05-12 13:09:48,236 INFO L125 PetriNetUnfolderBase]: For 544822/544911 co-relation queries the response was YES. [2024-05-12 13:09:48,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87765 conditions, 12084 events. 7688/12084 cut-off events. For 544822/544911 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 78393 event pairs, 2032 based on Foata normal form. 30/11785 useless extension candidates. Maximal degree in co-relation 87674. Up to 9291 conditions per place. [2024-05-12 13:09:48,391 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 222 selfloop transitions, 162 changer transitions 0/397 dead transitions. [2024-05-12 13:09:48,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 397 transitions, 6076 flow [2024-05-12 13:09:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-05-12 13:09:48,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-05-12 13:09:48,393 INFO L175 Difference]: Start difference. First operand has 205 places, 328 transitions, 4265 flow. Second operand 9 states and 243 transitions. [2024-05-12 13:09:48,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 397 transitions, 6076 flow [2024-05-12 13:09:49,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 397 transitions, 5720 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:49,211 INFO L231 Difference]: Finished difference. Result has 206 places, 332 transitions, 4349 flow [2024-05-12 13:09:49,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4349, PETRI_PLACES=206, PETRI_TRANSITIONS=332} [2024-05-12 13:09:49,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 150 predicate places. [2024-05-12 13:09:49,211 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 332 transitions, 4349 flow [2024-05-12 13:09:49,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:49,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:49,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:09:49,212 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 13:09:49,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -469135443, now seen corresponding path program 10 times [2024-05-12 13:09:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116576772] [2024-05-12 13:09:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:50,232 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 13:09:50,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:50,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116576772] [2024-05-12 13:09:50,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116576772] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:50,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:50,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:50,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648492307] [2024-05-12 13:09:50,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:50,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:50,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:50,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:50,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 332 transitions, 4349 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:50,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:50,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:50,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:52,460 INFO L124 PetriNetUnfolderBase]: 7672/12081 cut-off events. [2024-05-12 13:09:52,461 INFO L125 PetriNetUnfolderBase]: For 555545/555634 co-relation queries the response was YES. [2024-05-12 13:09:52,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87360 conditions, 12081 events. 7672/12081 cut-off events. For 555545/555634 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 78489 event pairs, 1901 based on Foata normal form. 34/11778 useless extension candidates. Maximal degree in co-relation 87269. Up to 9249 conditions per place. [2024-05-12 13:09:52,617 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 220 selfloop transitions, 162 changer transitions 0/395 dead transitions. [2024-05-12 13:09:52,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 395 transitions, 5891 flow [2024-05-12 13:09:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 13:09:52,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:09:52,619 INFO L175 Difference]: Start difference. First operand has 206 places, 332 transitions, 4349 flow. Second operand 9 states and 240 transitions. [2024-05-12 13:09:52,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 395 transitions, 5891 flow [2024-05-12 13:09:53,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 395 transitions, 5293 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:53,668 INFO L231 Difference]: Finished difference. Result has 207 places, 332 transitions, 4086 flow [2024-05-12 13:09:53,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4086, PETRI_PLACES=207, PETRI_TRANSITIONS=332} [2024-05-12 13:09:53,669 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 151 predicate places. [2024-05-12 13:09:53,669 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 332 transitions, 4086 flow [2024-05-12 13:09:53,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:09:53,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:53,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:53,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:09:53,670 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1299918117, now seen corresponding path program 2 times [2024-05-12 13:09:53,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:53,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873492474] [2024-05-12 13:09:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:53,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:54,431 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 13:09:54,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873492474] [2024-05-12 13:09:54,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873492474] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:54,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:54,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:09:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727130007] [2024-05-12 13:09:54,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:09:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:09:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:09:54,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:09:54,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 332 transitions, 4086 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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 13:09:54,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:54,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:09:54,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:56,590 INFO L124 PetriNetUnfolderBase]: 8415/13050 cut-off events. [2024-05-12 13:09:56,590 INFO L125 PetriNetUnfolderBase]: For 566797/566939 co-relation queries the response was YES. [2024-05-12 13:09:56,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89535 conditions, 13050 events. 8415/13050 cut-off events. For 566797/566939 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 81871 event pairs, 2646 based on Foata normal form. 59/12710 useless extension candidates. Maximal degree in co-relation 89444. Up to 11725 conditions per place. [2024-05-12 13:09:56,761 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 301 selfloop transitions, 26 changer transitions 0/354 dead transitions. [2024-05-12 13:09:56,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 354 transitions, 4860 flow [2024-05-12 13:09:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:09:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:09:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-05-12 13:09:56,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-05-12 13:09:56,762 INFO L175 Difference]: Start difference. First operand has 207 places, 332 transitions, 4086 flow. Second operand 6 states and 137 transitions. [2024-05-12 13:09:56,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 354 transitions, 4860 flow [2024-05-12 13:09:57,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 354 transitions, 4450 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:57,573 INFO L231 Difference]: Finished difference. Result has 205 places, 332 transitions, 3734 flow [2024-05-12 13:09:57,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3734, PETRI_PLACES=205, PETRI_TRANSITIONS=332} [2024-05-12 13:09:57,573 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-05-12 13:09:57,574 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 332 transitions, 3734 flow [2024-05-12 13:09:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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 13:09:57,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:57,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:09:57,574 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1362384794, now seen corresponding path program 1 times [2024-05-12 13:09:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:57,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131809363] [2024-05-12 13:09:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:58,493 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 13:09:58,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:58,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131809363] [2024-05-12 13:09:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131809363] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:58,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:58,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:09:58,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967320546] [2024-05-12 13:09:58,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:58,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:09:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:09:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:09:58,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:09:58,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 332 transitions, 3734 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 13:09:58,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:58,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:09:58,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:00,351 INFO L124 PetriNetUnfolderBase]: 7492/11709 cut-off events. [2024-05-12 13:10:00,351 INFO L125 PetriNetUnfolderBase]: For 499657/499759 co-relation queries the response was YES. [2024-05-12 13:10:00,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79605 conditions, 11709 events. 7492/11709 cut-off events. For 499657/499759 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 74218 event pairs, 2176 based on Foata normal form. 21/11418 useless extension candidates. Maximal degree in co-relation 79513. Up to 10459 conditions per place. [2024-05-12 13:10:00,493 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 319 selfloop transitions, 21 changer transitions 0/368 dead transitions. [2024-05-12 13:10:00,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 368 transitions, 4777 flow [2024-05-12 13:10:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-05-12 13:10:00,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 13:10:00,494 INFO L175 Difference]: Start difference. First operand has 205 places, 332 transitions, 3734 flow. Second operand 6 states and 144 transitions. [2024-05-12 13:10:00,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 368 transitions, 4777 flow [2024-05-12 13:10:01,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 368 transitions, 4699 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:01,318 INFO L231 Difference]: Finished difference. Result has 207 places, 342 transitions, 3861 flow [2024-05-12 13:10:01,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3861, PETRI_PLACES=207, PETRI_TRANSITIONS=342} [2024-05-12 13:10:01,319 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 151 predicate places. [2024-05-12 13:10:01,319 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 342 transitions, 3861 flow [2024-05-12 13:10:01,319 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 13:10:01,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:01,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:01,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:10:01,319 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:01,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:01,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1815606310, now seen corresponding path program 2 times [2024-05-12 13:10:01,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:01,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498732144] [2024-05-12 13:10:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:01,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:02,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498732144] [2024-05-12 13:10:02,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498732144] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:02,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:02,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:02,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902266076] [2024-05-12 13:10:02,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:02,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:02,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 342 transitions, 3861 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 13:10:02,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:02,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:02,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:04,160 INFO L124 PetriNetUnfolderBase]: 7489/11699 cut-off events. [2024-05-12 13:10:04,161 INFO L125 PetriNetUnfolderBase]: For 519750/519864 co-relation queries the response was YES. [2024-05-12 13:10:04,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81058 conditions, 11699 events. 7489/11699 cut-off events. For 519750/519864 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 73836 event pairs, 2265 based on Foata normal form. 35/11427 useless extension candidates. Maximal degree in co-relation 80964. Up to 10485 conditions per place. [2024-05-12 13:10:04,350 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 319 selfloop transitions, 13 changer transitions 0/360 dead transitions. [2024-05-12 13:10:04,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 360 transitions, 4603 flow [2024-05-12 13:10:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-05-12 13:10:04,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2024-05-12 13:10:04,351 INFO L175 Difference]: Start difference. First operand has 207 places, 342 transitions, 3861 flow. Second operand 6 states and 136 transitions. [2024-05-12 13:10:04,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 360 transitions, 4603 flow [2024-05-12 13:10:05,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 360 transitions, 4547 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-05-12 13:10:05,210 INFO L231 Difference]: Finished difference. Result has 212 places, 342 transitions, 3837 flow [2024-05-12 13:10:05,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3837, PETRI_PLACES=212, PETRI_TRANSITIONS=342} [2024-05-12 13:10:05,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 156 predicate places. [2024-05-12 13:10:05,211 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 342 transitions, 3837 flow [2024-05-12 13:10:05,211 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 13:10:05,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:05,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:05,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:10:05,212 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:05,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash -99676090, now seen corresponding path program 1 times [2024-05-12 13:10:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:05,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506808817] [2024-05-12 13:10:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:05,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:06,548 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 13:10:06,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506808817] [2024-05-12 13:10:06,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506808817] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:06,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:06,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:06,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798334838] [2024-05-12 13:10:06,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:06,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:06,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:06,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:06,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:06,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 342 transitions, 3837 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:06,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:06,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:06,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:08,780 INFO L124 PetriNetUnfolderBase]: 7352/11473 cut-off events. [2024-05-12 13:10:08,781 INFO L125 PetriNetUnfolderBase]: For 530441/530489 co-relation queries the response was YES. [2024-05-12 13:10:08,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80722 conditions, 11473 events. 7352/11473 cut-off events. For 530441/530489 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 72571 event pairs, 1994 based on Foata normal form. 4/11164 useless extension candidates. Maximal degree in co-relation 80625. Up to 10176 conditions per place. [2024-05-12 13:10:08,922 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 363 selfloop transitions, 40 changer transitions 0/418 dead transitions. [2024-05-12 13:10:08,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 418 transitions, 5109 flow [2024-05-12 13:10:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-05-12 13:10:08,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.482 [2024-05-12 13:10:08,924 INFO L175 Difference]: Start difference. First operand has 212 places, 342 transitions, 3837 flow. Second operand 10 states and 241 transitions. [2024-05-12 13:10:08,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 418 transitions, 5109 flow [2024-05-12 13:10:09,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 418 transitions, 5063 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:09,957 INFO L231 Difference]: Finished difference. Result has 219 places, 356 transitions, 4151 flow [2024-05-12 13:10:09,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4151, PETRI_PLACES=219, PETRI_TRANSITIONS=356} [2024-05-12 13:10:09,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 163 predicate places. [2024-05-12 13:10:09,958 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 356 transitions, 4151 flow [2024-05-12 13:10:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:09,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:09,959 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 13:10:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:10:09,959 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:09,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash -436857060, now seen corresponding path program 1 times [2024-05-12 13:10:09,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:09,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702130550] [2024-05-12 13:10:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:11,316 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 13:10:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702130550] [2024-05-12 13:10:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702130550] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:11,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687657603] [2024-05-12 13:10:11,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:11,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:11,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:11,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 356 transitions, 4151 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:11,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:11,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:11,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:13,842 INFO L124 PetriNetUnfolderBase]: 7787/12073 cut-off events. [2024-05-12 13:10:13,842 INFO L125 PetriNetUnfolderBase]: For 632764/632849 co-relation queries the response was YES. [2024-05-12 13:10:13,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90719 conditions, 12073 events. 7787/12073 cut-off events. For 632764/632849 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 76864 event pairs, 1791 based on Foata normal form. 12/11781 useless extension candidates. Maximal degree in co-relation 90620. Up to 10720 conditions per place. [2024-05-12 13:10:13,979 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 355 selfloop transitions, 43 changer transitions 0/416 dead transitions. [2024-05-12 13:10:13,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 416 transitions, 5315 flow [2024-05-12 13:10:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-05-12 13:10:13,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-05-12 13:10:13,981 INFO L175 Difference]: Start difference. First operand has 219 places, 356 transitions, 4151 flow. Second operand 9 states and 220 transitions. [2024-05-12 13:10:13,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 416 transitions, 5315 flow [2024-05-12 13:10:14,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 416 transitions, 5121 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:14,989 INFO L231 Difference]: Finished difference. Result has 225 places, 365 transitions, 4305 flow [2024-05-12 13:10:14,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4305, PETRI_PLACES=225, PETRI_TRANSITIONS=365} [2024-05-12 13:10:14,990 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-05-12 13:10:14,990 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 365 transitions, 4305 flow [2024-05-12 13:10:14,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:14,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:14,991 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 13:10:14,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:10:14,991 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:14,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2082013620, now seen corresponding path program 2 times [2024-05-12 13:10:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:14,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143713781] [2024-05-12 13:10:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:16,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:16,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143713781] [2024-05-12 13:10:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143713781] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:16,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:16,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501507791] [2024-05-12 13:10:16,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:16,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:16,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:16,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:16,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 365 transitions, 4305 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:16,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:16,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:16,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:18,844 INFO L124 PetriNetUnfolderBase]: 7855/12220 cut-off events. [2024-05-12 13:10:18,844 INFO L125 PetriNetUnfolderBase]: For 669045/669130 co-relation queries the response was YES. [2024-05-12 13:10:18,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93101 conditions, 12220 events. 7855/12220 cut-off events. For 669045/669130 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 78340 event pairs, 2090 based on Foata normal form. 12/11926 useless extension candidates. Maximal degree in co-relation 92998. Up to 10726 conditions per place. [2024-05-12 13:10:18,999 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 359 selfloop transitions, 52 changer transitions 0/429 dead transitions. [2024-05-12 13:10:18,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 429 transitions, 5742 flow [2024-05-12 13:10:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:10:19,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:10:19,001 INFO L175 Difference]: Start difference. First operand has 225 places, 365 transitions, 4305 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:10:19,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 429 transitions, 5742 flow [2024-05-12 13:10:20,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 429 transitions, 5524 flow, removed 93 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:20,310 INFO L231 Difference]: Finished difference. Result has 231 places, 375 transitions, 4490 flow [2024-05-12 13:10:20,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4490, PETRI_PLACES=231, PETRI_TRANSITIONS=375} [2024-05-12 13:10:20,310 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-05-12 13:10:20,310 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 375 transitions, 4490 flow [2024-05-12 13:10:20,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:20,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:20,311 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 13:10:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:10:20,311 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:20,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1805337818, now seen corresponding path program 3 times [2024-05-12 13:10:20,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:20,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734656157] [2024-05-12 13:10:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:20,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:21,761 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 13:10:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734656157] [2024-05-12 13:10:21,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734656157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:21,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:21,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:21,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702921009] [2024-05-12 13:10:21,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:21,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:21,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:21,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:21,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:21,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 375 transitions, 4490 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:21,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:21,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:21,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:24,267 INFO L124 PetriNetUnfolderBase]: 7854/12214 cut-off events. [2024-05-12 13:10:24,268 INFO L125 PetriNetUnfolderBase]: For 692111/692196 co-relation queries the response was YES. [2024-05-12 13:10:24,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93956 conditions, 12214 events. 7854/12214 cut-off events. For 692111/692196 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 78293 event pairs, 2088 based on Foata normal form. 12/11921 useless extension candidates. Maximal degree in co-relation 93850. Up to 10795 conditions per place. [2024-05-12 13:10:24,424 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 355 selfloop transitions, 57 changer transitions 0/430 dead transitions. [2024-05-12 13:10:24,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 430 transitions, 5586 flow [2024-05-12 13:10:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 13:10:24,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-05-12 13:10:24,426 INFO L175 Difference]: Start difference. First operand has 231 places, 375 transitions, 4490 flow. Second operand 9 states and 222 transitions. [2024-05-12 13:10:24,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 430 transitions, 5586 flow [2024-05-12 13:10:25,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 430 transitions, 5362 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:25,899 INFO L231 Difference]: Finished difference. Result has 236 places, 378 transitions, 4507 flow [2024-05-12 13:10:25,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4507, PETRI_PLACES=236, PETRI_TRANSITIONS=378} [2024-05-12 13:10:25,900 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 180 predicate places. [2024-05-12 13:10:25,900 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 378 transitions, 4507 flow [2024-05-12 13:10:25,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:25,901 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 13:10:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:10:25,901 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:25,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2105445138, now seen corresponding path program 1 times [2024-05-12 13:10:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676073389] [2024-05-12 13:10:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:27,073 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 13:10:27,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676073389] [2024-05-12 13:10:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676073389] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:27,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:27,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479979943] [2024-05-12 13:10:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:27,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:27,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 378 transitions, 4507 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:27,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:27,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:27,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:29,816 INFO L124 PetriNetUnfolderBase]: 7860/12215 cut-off events. [2024-05-12 13:10:29,816 INFO L125 PetriNetUnfolderBase]: For 706877/706962 co-relation queries the response was YES. [2024-05-12 13:10:29,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94562 conditions, 12215 events. 7860/12215 cut-off events. For 706877/706962 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 78227 event pairs, 2038 based on Foata normal form. 10/11923 useless extension candidates. Maximal degree in co-relation 94454. Up to 10797 conditions per place. [2024-05-12 13:10:29,943 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 363 selfloop transitions, 53 changer transitions 0/434 dead transitions. [2024-05-12 13:10:29,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 434 transitions, 5606 flow [2024-05-12 13:10:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-05-12 13:10:29,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:10:29,945 INFO L175 Difference]: Start difference. First operand has 236 places, 378 transitions, 4507 flow. Second operand 9 states and 225 transitions. [2024-05-12 13:10:29,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 434 transitions, 5606 flow [2024-05-12 13:10:31,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 434 transitions, 5401 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:31,269 INFO L231 Difference]: Finished difference. Result has 238 places, 382 transitions, 4531 flow [2024-05-12 13:10:31,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4302, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4531, PETRI_PLACES=238, PETRI_TRANSITIONS=382} [2024-05-12 13:10:31,269 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 182 predicate places. [2024-05-12 13:10:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 382 transitions, 4531 flow [2024-05-12 13:10:31,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:31,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:31,270 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 13:10:31,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:10:31,270 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 13:10:31,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1199540889, now seen corresponding path program 1 times [2024-05-12 13:10:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:31,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916799554] [2024-05-12 13:10:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:32,038 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 13:10:32,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:32,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916799554] [2024-05-12 13:10:32,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916799554] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:32,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:32,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47039790] [2024-05-12 13:10:32,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:32,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:32,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:32,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:10:32,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 382 transitions, 4531 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 13:10:32,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:32,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:10:32,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:34,745 INFO L124 PetriNetUnfolderBase]: 8584/13260 cut-off events. [2024-05-12 13:10:34,745 INFO L125 PetriNetUnfolderBase]: For 732160/732266 co-relation queries the response was YES. [2024-05-12 13:10:34,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97672 conditions, 13260 events. 8584/13260 cut-off events. For 732160/732266 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 82926 event pairs, 2547 based on Foata normal form. 54/12932 useless extension candidates. Maximal degree in co-relation 97563. Up to 11857 conditions per place. [2024-05-12 13:10:34,920 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 360 selfloop transitions, 45 changer transitions 0/437 dead transitions. [2024-05-12 13:10:34,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 437 transitions, 5859 flow [2024-05-12 13:10:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-05-12 13:10:34,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4828571428571429 [2024-05-12 13:10:34,922 INFO L175 Difference]: Start difference. First operand has 238 places, 382 transitions, 4531 flow. Second operand 7 states and 169 transitions. [2024-05-12 13:10:34,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 437 transitions, 5859 flow [2024-05-12 13:10:35,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 437 transitions, 5687 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:35,803 INFO L231 Difference]: Finished difference. Result has 240 places, 401 transitions, 4801 flow [2024-05-12 13:10:35,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4359, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4801, PETRI_PLACES=240, PETRI_TRANSITIONS=401} [2024-05-12 13:10:35,804 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 184 predicate places. [2024-05-12 13:10:35,804 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 401 transitions, 4801 flow [2024-05-12 13:10:35,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 13:10:35,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:35,804 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 13:10:35,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:10:35,804 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:35,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1416678206, now seen corresponding path program 4 times [2024-05-12 13:10:35,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:35,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718085641] [2024-05-12 13:10:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:37,208 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 13:10:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718085641] [2024-05-12 13:10:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718085641] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:37,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:37,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373102147] [2024-05-12 13:10:37,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:37,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:37,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 401 transitions, 4801 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:37,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:37,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:37,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:40,084 INFO L124 PetriNetUnfolderBase]: 7986/12593 cut-off events. [2024-05-12 13:10:40,084 INFO L125 PetriNetUnfolderBase]: For 769646/769718 co-relation queries the response was YES. [2024-05-12 13:10:40,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98995 conditions, 12593 events. 7986/12593 cut-off events. For 769646/769718 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 81542 event pairs, 2049 based on Foata normal form. 15/12246 useless extension candidates. Maximal degree in co-relation 98883. Up to 10815 conditions per place. [2024-05-12 13:10:40,265 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 359 selfloop transitions, 73 changer transitions 0/455 dead transitions. [2024-05-12 13:10:40,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 455 transitions, 5955 flow [2024-05-12 13:10:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:10:40,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49777777777777776 [2024-05-12 13:10:40,266 INFO L175 Difference]: Start difference. First operand has 240 places, 401 transitions, 4801 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:10:40,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 455 transitions, 5955 flow [2024-05-12 13:10:41,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 455 transitions, 5827 flow, removed 63 selfloop flow, removed 1 redundant places. [2024-05-12 13:10:41,689 INFO L231 Difference]: Finished difference. Result has 248 places, 404 transitions, 4949 flow [2024-05-12 13:10:41,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4673, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4949, PETRI_PLACES=248, PETRI_TRANSITIONS=404} [2024-05-12 13:10:41,693 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 192 predicate places. [2024-05-12 13:10:41,693 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 404 transitions, 4949 flow [2024-05-12 13:10:41,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:41,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:41,694 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 13:10:41,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:10:41,694 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:41,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1040604136, now seen corresponding path program 5 times [2024-05-12 13:10:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:41,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219389968] [2024-05-12 13:10:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:43,192 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 13:10:43,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:43,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219389968] [2024-05-12 13:10:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219389968] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:43,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966398760] [2024-05-12 13:10:43,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:43,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:43,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 404 transitions, 4949 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:43,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:43,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:43,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:45,939 INFO L124 PetriNetUnfolderBase]: 8070/12775 cut-off events. [2024-05-12 13:10:45,939 INFO L125 PetriNetUnfolderBase]: For 816878/816942 co-relation queries the response was YES. [2024-05-12 13:10:46,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101907 conditions, 12775 events. 8070/12775 cut-off events. For 816878/816942 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 83155 event pairs, 2062 based on Foata normal form. 15/12407 useless extension candidates. Maximal degree in co-relation 101792. Up to 10834 conditions per place. [2024-05-12 13:10:46,138 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 359 selfloop transitions, 81 changer transitions 0/463 dead transitions. [2024-05-12 13:10:46,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 463 transitions, 6455 flow [2024-05-12 13:10:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-05-12 13:10:46,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022222222222222 [2024-05-12 13:10:46,140 INFO L175 Difference]: Start difference. First operand has 248 places, 404 transitions, 4949 flow. Second operand 9 states and 226 transitions. [2024-05-12 13:10:46,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 463 transitions, 6455 flow [2024-05-12 13:10:47,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 463 transitions, 6197 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:47,685 INFO L231 Difference]: Finished difference. Result has 250 places, 410 transitions, 5111 flow [2024-05-12 13:10:47,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4691, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5111, PETRI_PLACES=250, PETRI_TRANSITIONS=410} [2024-05-12 13:10:47,686 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 194 predicate places. [2024-05-12 13:10:47,686 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 410 transitions, 5111 flow [2024-05-12 13:10:47,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:47,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:47,687 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 13:10:47,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:10:47,687 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:47,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1034170396, now seen corresponding path program 6 times [2024-05-12 13:10:47,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:47,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690916919] [2024-05-12 13:10:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:47,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:49,675 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 13:10:49,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:49,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690916919] [2024-05-12 13:10:49,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690916919] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:49,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:49,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:49,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355153697] [2024-05-12 13:10:49,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:49,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:49,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:49,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:49,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:49,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:49,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 410 transitions, 5111 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:49,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:49,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:49,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:53,008 INFO L124 PetriNetUnfolderBase]: 8062/12756 cut-off events. [2024-05-12 13:10:53,008 INFO L125 PetriNetUnfolderBase]: For 837198/837262 co-relation queries the response was YES. [2024-05-12 13:10:53,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102346 conditions, 12756 events. 8062/12756 cut-off events. For 837198/837262 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 82989 event pairs, 2055 based on Foata normal form. 15/12381 useless extension candidates. Maximal degree in co-relation 102230. Up to 10926 conditions per place. [2024-05-12 13:10:53,165 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 362 selfloop transitions, 76 changer transitions 0/461 dead transitions. [2024-05-12 13:10:53,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 461 transitions, 6161 flow [2024-05-12 13:10:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:10:53,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955555555555556 [2024-05-12 13:10:53,167 INFO L175 Difference]: Start difference. First operand has 250 places, 410 transitions, 5111 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:10:53,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 461 transitions, 6161 flow [2024-05-12 13:10:54,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 461 transitions, 5858 flow, removed 111 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:54,539 INFO L231 Difference]: Finished difference. Result has 254 places, 410 transitions, 4968 flow [2024-05-12 13:10:54,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4968, PETRI_PLACES=254, PETRI_TRANSITIONS=410} [2024-05-12 13:10:54,540 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 198 predicate places. [2024-05-12 13:10:54,540 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 410 transitions, 4968 flow [2024-05-12 13:10:54,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:54,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:54,540 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 13:10:54,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:10:54,540 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 13:10:54,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1423353560, now seen corresponding path program 1 times [2024-05-12 13:10:54,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904565456] [2024-05-12 13:10:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:54,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:55,940 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 13:10:55,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904565456] [2024-05-12 13:10:55,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904565456] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:55,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:55,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:55,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241282319] [2024-05-12 13:10:55,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:55,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:55,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:55,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:56,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:10:56,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 410 transitions, 4968 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 13:10:56,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:56,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:10:56,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:59,200 INFO L124 PetriNetUnfolderBase]: 8652/13403 cut-off events. [2024-05-12 13:10:59,201 INFO L125 PetriNetUnfolderBase]: For 847084/847119 co-relation queries the response was YES. [2024-05-12 13:10:59,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104133 conditions, 13403 events. 8652/13403 cut-off events. For 847084/847119 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 84085 event pairs, 2348 based on Foata normal form. 5/13033 useless extension candidates. Maximal degree in co-relation 104015. Up to 11961 conditions per place. [2024-05-12 13:10:59,356 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 426 selfloop transitions, 39 changer transitions 0/484 dead transitions. [2024-05-12 13:10:59,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 484 transitions, 6432 flow [2024-05-12 13:10:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-05-12 13:10:59,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466 [2024-05-12 13:10:59,357 INFO L175 Difference]: Start difference. First operand has 254 places, 410 transitions, 4968 flow. Second operand 10 states and 233 transitions. [2024-05-12 13:10:59,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 484 transitions, 6432 flow [2024-05-12 13:11:01,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 484 transitions, 6258 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 13:11:01,069 INFO L231 Difference]: Finished difference. Result has 257 places, 422 transitions, 5165 flow [2024-05-12 13:11:01,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4798, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5165, PETRI_PLACES=257, PETRI_TRANSITIONS=422} [2024-05-12 13:11:01,070 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 201 predicate places. [2024-05-12 13:11:01,070 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 422 transitions, 5165 flow [2024-05-12 13:11:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 13:11:01,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:01,070 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 13:11:01,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:11:01,070 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2013532534, now seen corresponding path program 1 times [2024-05-12 13:11:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:01,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531893519] [2024-05-12 13:11:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:01,963 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 13:11:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531893519] [2024-05-12 13:11:01,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531893519] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:01,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:01,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:01,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124110640] [2024-05-12 13:11:01,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:01,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:01,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:02,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:11:02,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 422 transitions, 5165 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 13:11:02,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:02,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:11:02,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:05,184 INFO L124 PetriNetUnfolderBase]: 8683/13460 cut-off events. [2024-05-12 13:11:05,185 INFO L125 PetriNetUnfolderBase]: For 862186/862278 co-relation queries the response was YES. [2024-05-12 13:11:05,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104081 conditions, 13460 events. 8683/13460 cut-off events. For 862186/862278 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 84390 event pairs, 2499 based on Foata normal form. 54/13118 useless extension candidates. Maximal degree in co-relation 103961. Up to 12009 conditions per place. [2024-05-12 13:11:05,361 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 391 selfloop transitions, 42 changer transitions 0/468 dead transitions. [2024-05-12 13:11:05,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 468 transitions, 6530 flow [2024-05-12 13:11:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-05-12 13:11:05,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-05-12 13:11:05,362 INFO L175 Difference]: Start difference. First operand has 257 places, 422 transitions, 5165 flow. Second operand 7 states and 166 transitions. [2024-05-12 13:11:05,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 468 transitions, 6530 flow [2024-05-12 13:11:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 468 transitions, 6300 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-05-12 13:11:07,303 INFO L231 Difference]: Finished difference. Result has 258 places, 431 transitions, 5170 flow [2024-05-12 13:11:07,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4935, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5170, PETRI_PLACES=258, PETRI_TRANSITIONS=431} [2024-05-12 13:11:07,305 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 202 predicate places. [2024-05-12 13:11:07,306 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 431 transitions, 5170 flow [2024-05-12 13:11:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 13:11:07,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:07,306 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 13:11:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:11:07,306 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:07,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2013532999, now seen corresponding path program 2 times [2024-05-12 13:11:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965576624] [2024-05-12 13:11:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:08,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965576624] [2024-05-12 13:11:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965576624] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:08,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:08,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303452412] [2024-05-12 13:11:08,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:08,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:08,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:11:08,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 431 transitions, 5170 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 13:11:08,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:08,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:11:08,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:11,643 INFO L124 PetriNetUnfolderBase]: 8713/13475 cut-off events. [2024-05-12 13:11:11,643 INFO L125 PetriNetUnfolderBase]: For 889492/889600 co-relation queries the response was YES. [2024-05-12 13:11:11,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105479 conditions, 13475 events. 8713/13475 cut-off events. For 889492/889600 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 84468 event pairs, 2508 based on Foata normal form. 55/13140 useless extension candidates. Maximal degree in co-relation 105357. Up to 12007 conditions per place. [2024-05-12 13:11:11,816 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 383 selfloop transitions, 49 changer transitions 0/467 dead transitions. [2024-05-12 13:11:11,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 467 transitions, 6359 flow [2024-05-12 13:11:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-05-12 13:11:11,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-05-12 13:11:11,818 INFO L175 Difference]: Start difference. First operand has 258 places, 431 transitions, 5170 flow. Second operand 7 states and 165 transitions. [2024-05-12 13:11:11,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 467 transitions, 6359 flow [2024-05-12 13:11:13,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 467 transitions, 6294 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-05-12 13:11:13,478 INFO L231 Difference]: Finished difference. Result has 263 places, 436 transitions, 5305 flow [2024-05-12 13:11:13,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5105, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5305, PETRI_PLACES=263, PETRI_TRANSITIONS=436} [2024-05-12 13:11:13,479 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 207 predicate places. [2024-05-12 13:11:13,479 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 436 transitions, 5305 flow [2024-05-12 13:11:13,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 13:11:13,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:13,577 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 13:11:13,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:11:13,577 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:13,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash 909175234, now seen corresponding path program 7 times [2024-05-12 13:11:13,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:13,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676612131] [2024-05-12 13:11:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:13,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:15,192 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 13:11:15,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:15,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676612131] [2024-05-12 13:11:15,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676612131] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:15,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:15,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:15,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311609899] [2024-05-12 13:11:15,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:15,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:15,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:15,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 436 transitions, 5305 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:15,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:15,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:15,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:18,370 INFO L124 PetriNetUnfolderBase]: 8103/12845 cut-off events. [2024-05-12 13:11:18,370 INFO L125 PetriNetUnfolderBase]: For 915629/915677 co-relation queries the response was YES. [2024-05-12 13:11:18,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105332 conditions, 12845 events. 8103/12845 cut-off events. For 915629/915677 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 84032 event pairs, 1863 based on Foata normal form. 20/12517 useless extension candidates. Maximal degree in co-relation 105207. Up to 10772 conditions per place. [2024-05-12 13:11:18,530 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 346 selfloop transitions, 117 changer transitions 0/488 dead transitions. [2024-05-12 13:11:18,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 488 transitions, 6541 flow [2024-05-12 13:11:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:11:18,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955555555555556 [2024-05-12 13:11:18,531 INFO L175 Difference]: Start difference. First operand has 263 places, 436 transitions, 5305 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:11:18,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 488 transitions, 6541 flow [2024-05-12 13:11:20,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 488 transitions, 6414 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:20,249 INFO L231 Difference]: Finished difference. Result has 269 places, 439 transitions, 5556 flow [2024-05-12 13:11:20,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5178, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5556, PETRI_PLACES=269, PETRI_TRANSITIONS=439} [2024-05-12 13:11:20,250 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 213 predicate places. [2024-05-12 13:11:20,250 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 439 transitions, 5556 flow [2024-05-12 13:11:20,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:20,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:20,250 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 13:11:20,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:11:20,250 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:20,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash 909421498, now seen corresponding path program 2 times [2024-05-12 13:11:20,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:20,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852848570] [2024-05-12 13:11:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:22,024 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 13:11:22,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:22,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852848570] [2024-05-12 13:11:22,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852848570] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:22,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:22,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:22,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230189191] [2024-05-12 13:11:22,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:22,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:11:22,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 439 transitions, 5556 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 13:11:22,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:22,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:11:22,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:25,123 INFO L124 PetriNetUnfolderBase]: 8702/13509 cut-off events. [2024-05-12 13:11:25,124 INFO L125 PetriNetUnfolderBase]: For 956474/956526 co-relation queries the response was YES. [2024-05-12 13:11:25,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109431 conditions, 13509 events. 8702/13509 cut-off events. For 956474/956526 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 85217 event pairs, 2171 based on Foata normal form. 27/13169 useless extension candidates. Maximal degree in co-relation 109305. Up to 11778 conditions per place. [2024-05-12 13:11:25,299 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 415 selfloop transitions, 89 changer transitions 0/524 dead transitions. [2024-05-12 13:11:25,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 524 transitions, 7274 flow [2024-05-12 13:11:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-05-12 13:11:25,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478 [2024-05-12 13:11:25,301 INFO L175 Difference]: Start difference. First operand has 269 places, 439 transitions, 5556 flow. Second operand 10 states and 239 transitions. [2024-05-12 13:11:25,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 524 transitions, 7274 flow [2024-05-12 13:11:27,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 524 transitions, 6906 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-05-12 13:11:27,175 INFO L231 Difference]: Finished difference. Result has 273 places, 451 transitions, 5681 flow [2024-05-12 13:11:27,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5681, PETRI_PLACES=273, PETRI_TRANSITIONS=451} [2024-05-12 13:11:27,177 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 217 predicate places. [2024-05-12 13:11:27,177 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 451 transitions, 5681 flow [2024-05-12 13:11:27,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 13:11:27,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:27,177 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 13:11:27,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:11:27,178 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:27,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash 894783396, now seen corresponding path program 3 times [2024-05-12 13:11:27,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028079348] [2024-05-12 13:11:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:28,640 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 13:11:28,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:28,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028079348] [2024-05-12 13:11:28,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028079348] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:28,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:28,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:28,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056782956] [2024-05-12 13:11:28,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:28,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:28,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:28,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 13:11:28,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 451 transitions, 5681 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 13:11:28,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:28,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 13:11:28,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand