./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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix011_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i ./goblint.2024-05-21_14-57-05.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:56:50,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:56:51,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:56:51,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:56:51,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:56:51,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:56:51,035 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:56:51,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:56:51,036 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:56:51,040 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:56:51,040 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:56:51,040 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:56:51,041 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:56:51,042 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:56:51,043 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:56:51,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:56:51,043 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:56:51,044 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:56:51,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:56:51,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:56:51,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:56:51,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:56:51,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:56:51,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:56:51,046 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:56:51,046 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:56:51,046 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:56:51,046 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:56:51,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:56:51,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:56:51,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:56:51,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:56:51,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:56:51,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:56:51,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:56:51,049 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:56:51,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:56:51,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:56:51,050 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:56:51,050 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:56:51,050 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:56:51,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:56:51,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:56:51,051 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:56:51,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:56:51,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:56:51,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:56:51,333 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:56:51,334 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:56:51,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-06-14 11:56:52,507 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:56:52,764 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:56:52,765 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_tso.oepc.i [2024-06-14 11:56:52,781 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/635610881/0912169401884f24852e57cf0ebe5cd2/FLAGe6da297a0 [2024-06-14 11:56:52,792 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/635610881/0912169401884f24852e57cf0ebe5cd2 [2024-06-14 11:56:52,794 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:56:52,794 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:56:52,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011_tso.oepc.yml/witness.yml [2024-06-14 11:56:53,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:56:53,003 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:56:53,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:56:53,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:56:53,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:56:53,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:56:52" (1/2) ... [2024-06-14 11:56:53,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16b46ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:53, skipping insertion in model container [2024-06-14 11:56:53,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:56:52" (1/2) ... [2024-06-14 11:56:53,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@515e47e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:56:53, skipping insertion in model container [2024-06-14 11:56:53,013 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:56:53" (2/2) ... [2024-06-14 11:56:53,014 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16b46ab0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53, skipping insertion in model container [2024-06-14 11:56:53,014 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:56:53" (2/2) ... [2024-06-14 11:56:53,014 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:56:53,122 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:56:53,124 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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:56:53,124 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= x$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))) [2024-06-14 11:56:53,124 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))) [2024-06-14 11:56:53,125 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:56:53,125 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-14 11:56:53,172 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:56:53,563 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:56:53,580 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:56:53,718 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:56:53,756 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:56:53,757 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53 WrapperNode [2024-06-14 11:56:53,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:56:53,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:56:53,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:56:53,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:56:53,764 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 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,784 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 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,888 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 153 [2024-06-14 11:56:53,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:56:53,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:56:53,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:56:53,889 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:56:53,903 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,912 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,929 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:56:53,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,930 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,940 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,954 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:56:53,955 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:56:53,955 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:56:53,955 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:56:53,956 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (1/1) ... [2024-06-14 11:56:53,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:56:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:56:53,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:56:54,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:56:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:56:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:56:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:56:54,038 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:56:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:56:54,039 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:56:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:56:54,039 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:56:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:56:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:56:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:56:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:56:54,041 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:56:54,182 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:56:54,184 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:56:54,571 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:56:54,571 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:56:54,803 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:56:54,804 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:56:54,804 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:56:54 BoogieIcfgContainer [2024-06-14 11:56:54,804 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:56:54,808 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:56:54,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:56:54,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:56:54,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:56:52" (1/4) ... [2024-06-14 11:56:54,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817a41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:56:54, skipping insertion in model container [2024-06-14 11:56:54,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:56:53" (2/4) ... [2024-06-14 11:56:54,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817a41e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:56:54, skipping insertion in model container [2024-06-14 11:56:54,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:56:53" (3/4) ... [2024-06-14 11:56:54,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817a41e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:56:54, skipping insertion in model container [2024-06-14 11:56:54,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:56:54" (4/4) ... [2024-06-14 11:56:54,814 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_tso.oepc.i [2024-06-14 11:56:54,831 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:56:54,832 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:56:54,832 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:56:54,882 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:56:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:56:54,945 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 11:56:54,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:56:54,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:56:54,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:56:54,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 11:56:54,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:56:54,972 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;@594da759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:56:54,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:56:54,978 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:56:54,978 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 11:56:54,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:56:54,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:54,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:56:54,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:54,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1127398156, now seen corresponding path program 1 times [2024-06-14 11:56:54,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:54,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499826208] [2024-06-14 11:56:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:54,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:56,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499826208] [2024-06-14 11:56:56,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499826208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:56,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:56,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:56:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60750513] [2024-06-14 11:56:56,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:56,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:56:56,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:56:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:56:56,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:56,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:56,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:56,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:56,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:57,080 INFO L124 PetriNetUnfolderBase]: 1407/2274 cut-off events. [2024-06-14 11:56:57,080 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 11:56:57,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4480 conditions, 2274 events. 1407/2274 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11867 event pairs, 989 based on Foata normal form. 1/2187 useless extension candidates. Maximal degree in co-relation 4465. Up to 2105 conditions per place. [2024-06-14 11:56:57,103 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 11:56:57,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-14 11:56:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:56:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:56:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-14 11:56:57,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:56:57,117 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 77 transitions. [2024-06-14 11:56:57,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-14 11:56:57,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:57,126 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 11:56:57,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 11:56:57,131 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 11:56:57,131 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 11:56:57,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:57,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:57,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:57,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:56:57,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:57,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1097853485, now seen corresponding path program 1 times [2024-06-14 11:56:57,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840338118] [2024-06-14 11:56:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:58,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:58,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840338118] [2024-06-14 11:56:58,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840338118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:58,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:58,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:56:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548204459] [2024-06-14 11:56:58,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:58,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:56:58,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:56:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:56:58,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:58,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:58,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:58,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:58,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:58,752 INFO L124 PetriNetUnfolderBase]: 1653/2577 cut-off events. [2024-06-14 11:56:58,753 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-14 11:56:58,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 2577 events. 1653/2577 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12996 event pairs, 1038 based on Foata normal form. 3/2568 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-14 11:56:58,769 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:56:58,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-14 11:56:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:56:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:56:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 11:56:58,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 11:56:58,772 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 96 transitions. [2024-06-14 11:56:58,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-14 11:56:58,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:56:58,774 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 11:56:58,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 11:56:58,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 11:56:58,775 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 11:56:58,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:58,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:58,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:58,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:56:58,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:58,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash 326280889, now seen corresponding path program 1 times [2024-06-14 11:56:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:58,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739244664] [2024-06-14 11:56:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:59,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:59,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739244664] [2024-06-14 11:56:59,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739244664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:59,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:59,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:56:59,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966362068] [2024-06-14 11:56:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:59,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:56:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:56:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:56:59,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:59,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:59,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:59,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:59,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:00,388 INFO L124 PetriNetUnfolderBase]: 1641/2563 cut-off events. [2024-06-14 11:57:00,388 INFO L125 PetriNetUnfolderBase]: For 1362/1362 co-relation queries the response was YES. [2024-06-14 11:57:00,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6341 conditions, 2563 events. 1641/2563 cut-off events. For 1362/1362 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12969 event pairs, 746 based on Foata normal form. 6/2559 useless extension candidates. Maximal degree in co-relation 6324. Up to 2393 conditions per place. [2024-06-14 11:57:00,403 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 11:57:00,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 332 flow [2024-06-14 11:57:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:57:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:57:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 11:57:00,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-14 11:57:00,413 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 118 transitions. [2024-06-14 11:57:00,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 332 flow [2024-06-14 11:57:00,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 318 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:57:00,417 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-14 11:57:00,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 11:57:00,419 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-14 11:57:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-14 11:57:00,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:00,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:00,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:00,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:57:00,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:00,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash 23340536, now seen corresponding path program 1 times [2024-06-14 11:57:00,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:00,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319910592] [2024-06-14 11:57:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:00,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:02,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:02,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319910592] [2024-06-14 11:57:02,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319910592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:02,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:02,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:02,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613271918] [2024-06-14 11:57:02,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:02,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:02,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:02,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:02,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:02,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:02,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:02,889 INFO L124 PetriNetUnfolderBase]: 1632/2544 cut-off events. [2024-06-14 11:57:02,890 INFO L125 PetriNetUnfolderBase]: For 2524/2524 co-relation queries the response was YES. [2024-06-14 11:57:02,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 2544 events. 1632/2544 cut-off events. For 2524/2524 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12805 event pairs, 582 based on Foata normal form. 6/2538 useless extension candidates. Maximal degree in co-relation 6870. Up to 2348 conditions per place. [2024-06-14 11:57:02,907 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-14 11:57:02,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 386 flow [2024-06-14 11:57:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:57:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:57:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:57:02,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-14 11:57:02,910 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:57:02,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 386 flow [2024-06-14 11:57:02,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 362 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:02,916 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 197 flow [2024-06-14 11:57:02,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-14 11:57:02,917 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-14 11:57:02,917 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 197 flow [2024-06-14 11:57:02,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:02,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:02,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:02,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:57:02,918 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:02,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -42166931, now seen corresponding path program 1 times [2024-06-14 11:57:02,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:02,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435284538] [2024-06-14 11:57:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:02,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:03,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435284538] [2024-06-14 11:57:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435284538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:03,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:03,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:57:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673461855] [2024-06-14 11:57:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:57:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:57:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:57:04,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:04,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:04,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:04,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:04,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:04,517 INFO L124 PetriNetUnfolderBase]: 1375/2225 cut-off events. [2024-06-14 11:57:04,518 INFO L125 PetriNetUnfolderBase]: For 3304/3304 co-relation queries the response was YES. [2024-06-14 11:57:04,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 2225 events. 1375/2225 cut-off events. For 3304/3304 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11551 event pairs, 673 based on Foata normal form. 2/2179 useless extension candidates. Maximal degree in co-relation 6328. Up to 2047 conditions per place. [2024-06-14 11:57:04,534 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-14 11:57:04,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 345 flow [2024-06-14 11:57:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:57:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:57:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-14 11:57:04,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-14 11:57:04,536 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 197 flow. Second operand 5 states and 101 transitions. [2024-06-14 11:57:04,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 345 flow [2024-06-14 11:57:04,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 312 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:04,543 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 210 flow [2024-06-14 11:57:04,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-14 11:57:04,546 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-14 11:57:04,546 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 210 flow [2024-06-14 11:57:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:04,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:04,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:04,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:57:04,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:04,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1277680009, now seen corresponding path program 1 times [2024-06-14 11:57:04,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:04,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476734226] [2024-06-14 11:57:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:04,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:05,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476734226] [2024-06-14 11:57:05,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476734226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:05,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:05,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:05,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880901904] [2024-06-14 11:57:05,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:05,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:05,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:05,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:05,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:05,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:05,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:06,310 INFO L124 PetriNetUnfolderBase]: 1621/2662 cut-off events. [2024-06-14 11:57:06,310 INFO L125 PetriNetUnfolderBase]: For 5188/5188 co-relation queries the response was YES. [2024-06-14 11:57:06,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 2662 events. 1621/2662 cut-off events. For 5188/5188 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14075 event pairs, 804 based on Foata normal form. 2/2638 useless extension candidates. Maximal degree in co-relation 7897. Up to 2396 conditions per place. [2024-06-14 11:57:06,330 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-14 11:57:06,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 388 flow [2024-06-14 11:57:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:57:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:57:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 11:57:06,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:57:06,332 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 210 flow. Second operand 6 states and 114 transitions. [2024-06-14 11:57:06,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 388 flow [2024-06-14 11:57:06,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 366 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:06,338 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 244 flow [2024-06-14 11:57:06,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-14 11:57:06,341 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-14 11:57:06,341 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 244 flow [2024-06-14 11:57:06,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:06,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:06,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:06,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:57:06,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:06,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:06,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1730984458, now seen corresponding path program 1 times [2024-06-14 11:57:06,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:06,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346428159] [2024-06-14 11:57:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:06,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:07,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:07,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346428159] [2024-06-14 11:57:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346428159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:07,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:07,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271369216] [2024-06-14 11:57:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:07,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:07,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:07,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:07,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:07,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:07,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:08,166 INFO L124 PetriNetUnfolderBase]: 1814/2880 cut-off events. [2024-06-14 11:57:08,166 INFO L125 PetriNetUnfolderBase]: For 8365/8365 co-relation queries the response was YES. [2024-06-14 11:57:08,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9371 conditions, 2880 events. 1814/2880 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14782 event pairs, 884 based on Foata normal form. 2/2882 useless extension candidates. Maximal degree in co-relation 9349. Up to 2655 conditions per place. [2024-06-14 11:57:08,193 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-14 11:57:08,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 442 flow [2024-06-14 11:57:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:57:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:57:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 11:57:08,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:57:08,201 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 244 flow. Second operand 6 states and 117 transitions. [2024-06-14 11:57:08,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 442 flow [2024-06-14 11:57:08,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 410 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:08,206 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 270 flow [2024-06-14 11:57:08,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-14 11:57:08,208 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 11:57:08,208 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 270 flow [2024-06-14 11:57:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:08,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:08,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:08,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:57:08,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:08,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1867666548, now seen corresponding path program 2 times [2024-06-14 11:57:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:08,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890115943] [2024-06-14 11:57:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:09,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:09,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890115943] [2024-06-14 11:57:09,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890115943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:09,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:09,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833684237] [2024-06-14 11:57:09,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:09,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:09,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:09,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:09,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:09,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:09,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:09,886 INFO L124 PetriNetUnfolderBase]: 1809/2875 cut-off events. [2024-06-14 11:57:09,887 INFO L125 PetriNetUnfolderBase]: For 10932/10940 co-relation queries the response was YES. [2024-06-14 11:57:09,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9978 conditions, 2875 events. 1809/2875 cut-off events. For 10932/10940 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14833 event pairs, 891 based on Foata normal form. 10/2885 useless extension candidates. Maximal degree in co-relation 9955. Up to 2630 conditions per place. [2024-06-14 11:57:09,904 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-14 11:57:09,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 466 flow [2024-06-14 11:57:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:57:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:57:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 11:57:09,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:57:09,910 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 270 flow. Second operand 6 states and 116 transitions. [2024-06-14 11:57:09,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 466 flow [2024-06-14 11:57:09,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 432 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:09,915 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 310 flow [2024-06-14 11:57:09,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-14 11:57:09,917 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-14 11:57:09,917 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 310 flow [2024-06-14 11:57:09,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:09,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:09,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:09,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:57:09,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:09,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1867658612, now seen corresponding path program 1 times [2024-06-14 11:57:09,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:09,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158852043] [2024-06-14 11:57:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:09,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:11,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:11,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158852043] [2024-06-14 11:57:11,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158852043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:11,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:11,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:11,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063418906] [2024-06-14 11:57:11,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:11,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:11,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:11,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:11,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:11,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:11,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:11,827 INFO L124 PetriNetUnfolderBase]: 1622/2691 cut-off events. [2024-06-14 11:57:11,827 INFO L125 PetriNetUnfolderBase]: For 11337/11337 co-relation queries the response was YES. [2024-06-14 11:57:11,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9624 conditions, 2691 events. 1622/2691 cut-off events. For 11337/11337 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14324 event pairs, 774 based on Foata normal form. 2/2683 useless extension candidates. Maximal degree in co-relation 9600. Up to 2389 conditions per place. [2024-06-14 11:57:11,844 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-14 11:57:11,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 532 flow [2024-06-14 11:57:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:57:11,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 11:57:11,846 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 310 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:57:11,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 532 flow [2024-06-14 11:57:11,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 482 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:11,851 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 330 flow [2024-06-14 11:57:11,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-14 11:57:11,852 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-14 11:57:11,853 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 330 flow [2024-06-14 11:57:11,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:11,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:11,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:57:11,854 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:11,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2054629242, now seen corresponding path program 1 times [2024-06-14 11:57:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040850163] [2024-06-14 11:57:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:12,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040850163] [2024-06-14 11:57:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040850163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:12,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:12,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:12,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424611474] [2024-06-14 11:57:12,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:12,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:13,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:13,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:13,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:13,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:13,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:13,730 INFO L124 PetriNetUnfolderBase]: 1826/2914 cut-off events. [2024-06-14 11:57:13,731 INFO L125 PetriNetUnfolderBase]: For 16769/16769 co-relation queries the response was YES. [2024-06-14 11:57:13,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11325 conditions, 2914 events. 1826/2914 cut-off events. For 16769/16769 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15001 event pairs, 706 based on Foata normal form. 4/2918 useless extension candidates. Maximal degree in co-relation 11300. Up to 2634 conditions per place. [2024-06-14 11:57:13,747 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2024-06-14 11:57:13,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 608 flow [2024-06-14 11:57:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:57:13,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:57:13,749 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 330 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:57:13,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 608 flow [2024-06-14 11:57:13,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 562 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:13,757 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 380 flow [2024-06-14 11:57:13,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-14 11:57:13,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-14 11:57:13,759 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 380 flow [2024-06-14 11:57:13,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:13,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:13,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:13,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:57:13,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:13,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2054749398, now seen corresponding path program 1 times [2024-06-14 11:57:13,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:13,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004198809] [2024-06-14 11:57:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:14,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:14,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004198809] [2024-06-14 11:57:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004198809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:14,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:14,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558020790] [2024-06-14 11:57:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:14,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:14,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:14,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:14,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:14,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:14,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:15,457 INFO L124 PetriNetUnfolderBase]: 1952/3044 cut-off events. [2024-06-14 11:57:15,457 INFO L125 PetriNetUnfolderBase]: For 20318/20318 co-relation queries the response was YES. [2024-06-14 11:57:15,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12615 conditions, 3044 events. 1952/3044 cut-off events. For 20318/20318 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15200 event pairs, 753 based on Foata normal form. 2/3046 useless extension candidates. Maximal degree in co-relation 12588. Up to 2854 conditions per place. [2024-06-14 11:57:15,483 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 72 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-14 11:57:15,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 642 flow [2024-06-14 11:57:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 11:57:15,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 11:57:15,485 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 380 flow. Second operand 7 states and 128 transitions. [2024-06-14 11:57:15,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 642 flow [2024-06-14 11:57:15,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 598 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:15,494 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 412 flow [2024-06-14 11:57:15,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-14 11:57:15,495 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-14 11:57:15,495 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 412 flow [2024-06-14 11:57:15,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:15,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:15,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:15,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:57:15,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:15,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2120912222, now seen corresponding path program 2 times [2024-06-14 11:57:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:15,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839128310] [2024-06-14 11:57:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839128310] [2024-06-14 11:57:16,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839128310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:16,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:16,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:16,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853895257] [2024-06-14 11:57:16,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:16,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:16,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:16,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:16,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:16,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:16,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:16,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:16,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:16,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:17,251 INFO L124 PetriNetUnfolderBase]: 1883/2980 cut-off events. [2024-06-14 11:57:17,252 INFO L125 PetriNetUnfolderBase]: For 25076/25082 co-relation queries the response was YES. [2024-06-14 11:57:17,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13084 conditions, 2980 events. 1883/2980 cut-off events. For 25076/25082 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15246 event pairs, 689 based on Foata normal form. 4/2977 useless extension candidates. Maximal degree in co-relation 13056. Up to 2666 conditions per place. [2024-06-14 11:57:17,273 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 69 selfloop transitions, 24 changer transitions 0/101 dead transitions. [2024-06-14 11:57:17,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 790 flow [2024-06-14 11:57:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 11:57:17,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 11:57:17,275 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 412 flow. Second operand 7 states and 141 transitions. [2024-06-14 11:57:17,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 790 flow [2024-06-14 11:57:17,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 738 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:17,286 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 502 flow [2024-06-14 11:57:17,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-14 11:57:17,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-14 11:57:17,286 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 502 flow [2024-06-14 11:57:17,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:17,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:17,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:17,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:57:17,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:17,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 509969150, now seen corresponding path program 3 times [2024-06-14 11:57:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:17,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933360038] [2024-06-14 11:57:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:17,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:18,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933360038] [2024-06-14 11:57:18,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933360038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:18,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:18,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:18,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935253307] [2024-06-14 11:57:18,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:18,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:18,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:18,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:18,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 502 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:18,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:18,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:18,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:18,979 INFO L124 PetriNetUnfolderBase]: 1869/2982 cut-off events. [2024-06-14 11:57:18,979 INFO L125 PetriNetUnfolderBase]: For 29757/29763 co-relation queries the response was YES. [2024-06-14 11:57:18,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13608 conditions, 2982 events. 1869/2982 cut-off events. For 29757/29763 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15319 event pairs, 701 based on Foata normal form. 8/2990 useless extension candidates. Maximal degree in co-relation 13579. Up to 2615 conditions per place. [2024-06-14 11:57:19,001 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 31 changer transitions 0/101 dead transitions. [2024-06-14 11:57:19,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 842 flow [2024-06-14 11:57:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 11:57:19,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:57:19,004 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 502 flow. Second operand 7 states and 140 transitions. [2024-06-14 11:57:19,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 842 flow [2024-06-14 11:57:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 794 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:19,027 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 576 flow [2024-06-14 11:57:19,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=576, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-14 11:57:19,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-14 11:57:19,028 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 576 flow [2024-06-14 11:57:19,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:19,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:19,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:57:19,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:19,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 509969336, now seen corresponding path program 2 times [2024-06-14 11:57:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114518941] [2024-06-14 11:57:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:19,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:20,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:20,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114518941] [2024-06-14 11:57:20,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114518941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:20,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:20,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635860425] [2024-06-14 11:57:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:20,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:20,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 576 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:20,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:20,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:20,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:20,715 INFO L124 PetriNetUnfolderBase]: 1991/3107 cut-off events. [2024-06-14 11:57:20,715 INFO L125 PetriNetUnfolderBase]: For 34200/34210 co-relation queries the response was YES. [2024-06-14 11:57:20,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14821 conditions, 3107 events. 1991/3107 cut-off events. For 34200/34210 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15536 event pairs, 745 based on Foata normal form. 12/3119 useless extension candidates. Maximal degree in co-relation 14790. Up to 2864 conditions per place. [2024-06-14 11:57:20,733 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 26 changer transitions 0/105 dead transitions. [2024-06-14 11:57:20,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 105 transitions, 968 flow [2024-06-14 11:57:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:57:20,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 11:57:20,735 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 576 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:57:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 105 transitions, 968 flow [2024-06-14 11:57:20,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 870 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:20,750 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 632 flow [2024-06-14 11:57:20,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=632, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-14 11:57:20,751 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-14 11:57:20,751 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 632 flow [2024-06-14 11:57:20,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:20,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:20,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:20,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:57:20,752 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:20,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 510206486, now seen corresponding path program 3 times [2024-06-14 11:57:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:20,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075301462] [2024-06-14 11:57:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:21,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:21,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075301462] [2024-06-14 11:57:21,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075301462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:21,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:21,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:21,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349144954] [2024-06-14 11:57:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:21,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:21,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:21,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:22,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:22,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 632 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:22,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:22,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:22,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:22,530 INFO L124 PetriNetUnfolderBase]: 1986/3100 cut-off events. [2024-06-14 11:57:22,530 INFO L125 PetriNetUnfolderBase]: For 38438/38448 co-relation queries the response was YES. [2024-06-14 11:57:22,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15224 conditions, 3100 events. 1986/3100 cut-off events. For 38438/38448 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15488 event pairs, 745 based on Foata normal form. 12/3112 useless extension candidates. Maximal degree in co-relation 15192. Up to 2859 conditions per place. [2024-06-14 11:57:22,552 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 71 selfloop transitions, 27 changer transitions 0/103 dead transitions. [2024-06-14 11:57:22,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 876 flow [2024-06-14 11:57:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 11:57:22,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 11:57:22,555 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 632 flow. Second operand 7 states and 128 transitions. [2024-06-14 11:57:22,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 876 flow [2024-06-14 11:57:22,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 784 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:22,581 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 602 flow [2024-06-14 11:57:22,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=602, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-14 11:57:22,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-14 11:57:22,582 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 602 flow [2024-06-14 11:57:22,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:22,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:22,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:22,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:57:22,583 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:22,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1015075437, now seen corresponding path program 1 times [2024-06-14 11:57:22,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:22,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913182103] [2024-06-14 11:57:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:22,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:23,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:23,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913182103] [2024-06-14 11:57:23,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913182103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:23,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:23,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:57:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560342411] [2024-06-14 11:57:23,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:23,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:57:23,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:57:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:57:23,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:23,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 602 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:23,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:23,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:23,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:24,144 INFO L124 PetriNetUnfolderBase]: 2166/3390 cut-off events. [2024-06-14 11:57:24,144 INFO L125 PetriNetUnfolderBase]: For 45590/45590 co-relation queries the response was YES. [2024-06-14 11:57:24,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16868 conditions, 3390 events. 2166/3390 cut-off events. For 45590/45590 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17026 event pairs, 834 based on Foata normal form. 1/3391 useless extension candidates. Maximal degree in co-relation 16834. Up to 3173 conditions per place. [2024-06-14 11:57:24,161 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 78 selfloop transitions, 8 changer transitions 0/95 dead transitions. [2024-06-14 11:57:24,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 816 flow [2024-06-14 11:57:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:57:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:57:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 11:57:24,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-14 11:57:24,162 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 602 flow. Second operand 5 states and 89 transitions. [2024-06-14 11:57:24,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 816 flow [2024-06-14 11:57:24,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 754 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:24,184 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 590 flow [2024-06-14 11:57:24,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=590, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-14 11:57:24,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-14 11:57:24,185 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 590 flow [2024-06-14 11:57:24,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:24,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:24,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:24,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:57:24,186 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:24,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash -731091541, now seen corresponding path program 1 times [2024-06-14 11:57:24,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:24,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718329468] [2024-06-14 11:57:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:25,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718329468] [2024-06-14 11:57:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718329468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:25,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:25,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918638822] [2024-06-14 11:57:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:25,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:25,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 590 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-14 11:57:25,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:25,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:25,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:26,170 INFO L124 PetriNetUnfolderBase]: 1965/3082 cut-off events. [2024-06-14 11:57:26,171 INFO L125 PetriNetUnfolderBase]: For 50240/50240 co-relation queries the response was YES. [2024-06-14 11:57:26,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16464 conditions, 3082 events. 1965/3082 cut-off events. For 50240/50240 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15692 event pairs, 724 based on Foata normal form. 2/3084 useless extension candidates. Maximal degree in co-relation 16429. Up to 2772 conditions per place. [2024-06-14 11:57:26,189 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 83 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-14 11:57:26,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 113 transitions, 862 flow [2024-06-14 11:57:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:57:26,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:57:26,191 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 590 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:57:26,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 113 transitions, 862 flow [2024-06-14 11:57:26,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 113 transitions, 810 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:26,209 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 588 flow [2024-06-14 11:57:26,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-14 11:57:26,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-14 11:57:26,210 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 588 flow [2024-06-14 11:57:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-14 11:57:26,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:26,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:57:26,211 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:26,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1320052134, now seen corresponding path program 1 times [2024-06-14 11:57:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782757647] [2024-06-14 11:57:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:27,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:27,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782757647] [2024-06-14 11:57:27,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782757647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:27,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:27,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425812934] [2024-06-14 11:57:27,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:27,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:27,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 588 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:27,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:27,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:27,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:27,934 INFO L124 PetriNetUnfolderBase]: 2098/3225 cut-off events. [2024-06-14 11:57:27,934 INFO L125 PetriNetUnfolderBase]: For 55863/55863 co-relation queries the response was YES. [2024-06-14 11:57:27,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17542 conditions, 3225 events. 2098/3225 cut-off events. For 55863/55863 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15965 event pairs, 759 based on Foata normal form. 4/3229 useless extension candidates. Maximal degree in co-relation 17506. Up to 2971 conditions per place. [2024-06-14 11:57:27,951 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 95 selfloop transitions, 20 changer transitions 0/121 dead transitions. [2024-06-14 11:57:27,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 121 transitions, 948 flow [2024-06-14 11:57:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:57:27,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:57:27,952 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 588 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:57:27,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 121 transitions, 948 flow [2024-06-14 11:57:27,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 902 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:27,970 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 644 flow [2024-06-14 11:57:27,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-06-14 11:57:27,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 11:57:27,971 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 644 flow [2024-06-14 11:57:27,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:27,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:27,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:27,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:57:27,971 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:27,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1323777001, now seen corresponding path program 1 times [2024-06-14 11:57:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:27,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965624513] [2024-06-14 11:57:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:29,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965624513] [2024-06-14 11:57:29,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965624513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:29,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:29,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927645270] [2024-06-14 11:57:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:29,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:29,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:29,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:29,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:29,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 644 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:29,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:29,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:29,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:29,818 INFO L124 PetriNetUnfolderBase]: 2111/3248 cut-off events. [2024-06-14 11:57:29,818 INFO L125 PetriNetUnfolderBase]: For 62421/62421 co-relation queries the response was YES. [2024-06-14 11:57:29,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18333 conditions, 3248 events. 2111/3248 cut-off events. For 62421/62421 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16119 event pairs, 746 based on Foata normal form. 2/3250 useless extension candidates. Maximal degree in co-relation 18296. Up to 3033 conditions per place. [2024-06-14 11:57:29,837 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 96 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2024-06-14 11:57:29,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 119 transitions, 984 flow [2024-06-14 11:57:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:57:29,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 11:57:29,839 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 644 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:57:29,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 119 transitions, 984 flow [2024-06-14 11:57:29,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 119 transitions, 906 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:29,868 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 662 flow [2024-06-14 11:57:29,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=662, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-14 11:57:29,869 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-14 11:57:29,869 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 662 flow [2024-06-14 11:57:29,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:29,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:29,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:29,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:57:29,870 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:29,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1323771204, now seen corresponding path program 2 times [2024-06-14 11:57:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:29,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344264693] [2024-06-14 11:57:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:30,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:30,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344264693] [2024-06-14 11:57:30,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344264693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:30,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:30,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:30,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165739343] [2024-06-14 11:57:30,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:30,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:30,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:30,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:31,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:31,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 662 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:31,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:31,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:31,631 INFO L124 PetriNetUnfolderBase]: 2183/3347 cut-off events. [2024-06-14 11:57:31,631 INFO L125 PetriNetUnfolderBase]: For 72347/72353 co-relation queries the response was YES. [2024-06-14 11:57:31,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19641 conditions, 3347 events. 2183/3347 cut-off events. For 72347/72353 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16589 event pairs, 741 based on Foata normal form. 4/3345 useless extension candidates. Maximal degree in co-relation 19603. Up to 2989 conditions per place. [2024-06-14 11:57:31,648 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 36 changer transitions 0/135 dead transitions. [2024-06-14 11:57:31,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 1322 flow [2024-06-14 11:57:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:57:31,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:57:31,649 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 662 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:57:31,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 1322 flow [2024-06-14 11:57:31,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1250 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:31,671 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 844 flow [2024-06-14 11:57:31,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=844, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-14 11:57:31,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-14 11:57:31,672 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 844 flow [2024-06-14 11:57:31,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:31,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:31,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:31,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:57:31,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:31,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1323776784, now seen corresponding path program 3 times [2024-06-14 11:57:31,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:31,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841019388] [2024-06-14 11:57:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:32,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:32,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841019388] [2024-06-14 11:57:32,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841019388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:32,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:32,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:32,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272802554] [2024-06-14 11:57:32,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:32,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:32,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:32,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:32,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:32,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:32,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:32,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:33,442 INFO L124 PetriNetUnfolderBase]: 2173/3333 cut-off events. [2024-06-14 11:57:33,442 INFO L125 PetriNetUnfolderBase]: For 79875/79881 co-relation queries the response was YES. [2024-06-14 11:57:33,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20213 conditions, 3333 events. 2173/3333 cut-off events. For 79875/79881 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16573 event pairs, 734 based on Foata normal form. 4/3331 useless extension candidates. Maximal degree in co-relation 20174. Up to 2981 conditions per place. [2024-06-14 11:57:33,462 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 38 changer transitions 0/133 dead transitions. [2024-06-14 11:57:33,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1258 flow [2024-06-14 11:57:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:57:33,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:57:33,464 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 844 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:57:33,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1258 flow [2024-06-14 11:57:33,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1148 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-14 11:57:33,494 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 818 flow [2024-06-14 11:57:33,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-14 11:57:33,495 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-14 11:57:33,495 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 818 flow [2024-06-14 11:57:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:33,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:33,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:33,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:57:33,496 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:33,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash -254249848, now seen corresponding path program 4 times [2024-06-14 11:57:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:33,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217149882] [2024-06-14 11:57:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:33,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:34,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:34,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217149882] [2024-06-14 11:57:34,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217149882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:34,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:34,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:34,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468268410] [2024-06-14 11:57:34,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:34,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:34,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:34,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:34,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:34,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:34,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:34,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:35,141 INFO L124 PetriNetUnfolderBase]: 2195/3378 cut-off events. [2024-06-14 11:57:35,142 INFO L125 PetriNetUnfolderBase]: For 86242/86248 co-relation queries the response was YES. [2024-06-14 11:57:35,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20717 conditions, 3378 events. 2195/3378 cut-off events. For 86242/86248 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16859 event pairs, 756 based on Foata normal form. 8/3386 useless extension candidates. Maximal degree in co-relation 20676. Up to 2898 conditions per place. [2024-06-14 11:57:35,161 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 54 changer transitions 0/138 dead transitions. [2024-06-14 11:57:35,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 138 transitions, 1448 flow [2024-06-14 11:57:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:57:35,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:57:35,163 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 818 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:57:35,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 138 transitions, 1448 flow [2024-06-14 11:57:35,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1376 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:35,194 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 992 flow [2024-06-14 11:57:35,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=992, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2024-06-14 11:57:35,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-14 11:57:35,194 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 992 flow [2024-06-14 11:57:35,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:35,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:35,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:35,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:57:35,195 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:35,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1370818192, now seen corresponding path program 5 times [2024-06-14 11:57:35,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:35,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973976875] [2024-06-14 11:57:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:35,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:36,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973976875] [2024-06-14 11:57:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973976875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:36,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:36,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:36,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891497109] [2024-06-14 11:57:36,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:36,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:36,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:36,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:36,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 992 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:36,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:36,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:36,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:36,895 INFO L124 PetriNetUnfolderBase]: 2233/3421 cut-off events. [2024-06-14 11:57:36,896 INFO L125 PetriNetUnfolderBase]: For 97150/97156 co-relation queries the response was YES. [2024-06-14 11:57:36,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21820 conditions, 3421 events. 2233/3421 cut-off events. For 97150/97156 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16963 event pairs, 767 based on Foata normal form. 8/3426 useless extension candidates. Maximal degree in co-relation 21778. Up to 2939 conditions per place. [2024-06-14 11:57:36,914 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 80 selfloop transitions, 56 changer transitions 0/142 dead transitions. [2024-06-14 11:57:36,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1586 flow [2024-06-14 11:57:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:57:36,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:57:36,915 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 992 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:57:36,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1586 flow [2024-06-14 11:57:36,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1416 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:36,962 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 1010 flow [2024-06-14 11:57:36,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1010, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-06-14 11:57:36,962 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-14 11:57:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 1010 flow [2024-06-14 11:57:36,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:36,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:36,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:57:36,963 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:36,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1363199415, now seen corresponding path program 2 times [2024-06-14 11:57:36,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:36,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65963917] [2024-06-14 11:57:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:36,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:38,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65963917] [2024-06-14 11:57:38,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65963917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:38,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:38,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:38,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818668791] [2024-06-14 11:57:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:38,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:38,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:38,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 1010 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:38,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:38,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:38,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:38,671 INFO L124 PetriNetUnfolderBase]: 2226/3421 cut-off events. [2024-06-14 11:57:38,671 INFO L125 PetriNetUnfolderBase]: For 99144/99154 co-relation queries the response was YES. [2024-06-14 11:57:38,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21651 conditions, 3421 events. 2226/3421 cut-off events. For 99144/99154 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17030 event pairs, 750 based on Foata normal form. 12/3433 useless extension candidates. Maximal degree in co-relation 21608. Up to 3121 conditions per place. [2024-06-14 11:57:38,695 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 38 changer transitions 0/142 dead transitions. [2024-06-14 11:57:38,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 142 transitions, 1546 flow [2024-06-14 11:57:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:57:38,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 11:57:38,696 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 1010 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:57:38,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 142 transitions, 1546 flow [2024-06-14 11:57:38,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 142 transitions, 1408 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:38,747 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 1074 flow [2024-06-14 11:57:38,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1074, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-06-14 11:57:38,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 11:57:38,748 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 1074 flow [2024-06-14 11:57:38,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:38,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:38,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:57:38,748 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:38,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 468833515, now seen corresponding path program 3 times [2024-06-14 11:57:38,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:38,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305292883] [2024-06-14 11:57:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:39,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:39,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305292883] [2024-06-14 11:57:39,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305292883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:39,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:39,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:39,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130432313] [2024-06-14 11:57:39,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:39,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:39,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:39,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:39,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:39,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:39,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 1074 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:39,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:39,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:39,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:40,427 INFO L124 PetriNetUnfolderBase]: 2237/3442 cut-off events. [2024-06-14 11:57:40,427 INFO L125 PetriNetUnfolderBase]: For 107484/107494 co-relation queries the response was YES. [2024-06-14 11:57:40,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22213 conditions, 3442 events. 2237/3442 cut-off events. For 107484/107494 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17214 event pairs, 750 based on Foata normal form. 12/3454 useless extension candidates. Maximal degree in co-relation 22169. Up to 3133 conditions per place. [2024-06-14 11:57:40,448 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 101 selfloop transitions, 38 changer transitions 0/145 dead transitions. [2024-06-14 11:57:40,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1570 flow [2024-06-14 11:57:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:57:40,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 11:57:40,450 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 1074 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:57:40,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1570 flow [2024-06-14 11:57:40,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 145 transitions, 1472 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:40,589 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 1122 flow [2024-06-14 11:57:40,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1122, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2024-06-14 11:57:40,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-14 11:57:40,590 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 1122 flow [2024-06-14 11:57:40,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:40,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:40,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:57:40,590 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:40,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1363466325, now seen corresponding path program 4 times [2024-06-14 11:57:40,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:40,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857699491] [2024-06-14 11:57:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:40,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:41,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857699491] [2024-06-14 11:57:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857699491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:41,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:41,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:41,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132671354] [2024-06-14 11:57:41,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:41,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:41,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:41,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:41,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 1122 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:41,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:41,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:41,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:42,436 INFO L124 PetriNetUnfolderBase]: 2232/3435 cut-off events. [2024-06-14 11:57:42,436 INFO L125 PetriNetUnfolderBase]: For 113960/113970 co-relation queries the response was YES. [2024-06-14 11:57:42,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22457 conditions, 3435 events. 2232/3435 cut-off events. For 113960/113970 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17194 event pairs, 750 based on Foata normal form. 12/3447 useless extension candidates. Maximal degree in co-relation 22411. Up to 3128 conditions per place. [2024-06-14 11:57:42,459 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 39 changer transitions 0/143 dead transitions. [2024-06-14 11:57:42,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 1454 flow [2024-06-14 11:57:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 11:57:42,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 11:57:42,461 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 1122 flow. Second operand 8 states and 146 transitions. [2024-06-14 11:57:42,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 1454 flow [2024-06-14 11:57:42,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 1312 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:42,522 INFO L231 Difference]: Finished difference. Result has 112 places, 120 transitions, 1066 flow [2024-06-14 11:57:42,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=112, PETRI_TRANSITIONS=120} [2024-06-14 11:57:42,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-14 11:57:42,523 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 120 transitions, 1066 flow [2024-06-14 11:57:42,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:42,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:42,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:42,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:57:42,523 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:42,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1363466542, now seen corresponding path program 6 times [2024-06-14 11:57:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:42,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922915261] [2024-06-14 11:57:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:42,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:43,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:43,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922915261] [2024-06-14 11:57:43,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922915261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:43,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:43,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:43,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476761719] [2024-06-14 11:57:43,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:43,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:43,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:43,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 120 transitions, 1066 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:43,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:43,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:43,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:44,130 INFO L124 PetriNetUnfolderBase]: 2224/3426 cut-off events. [2024-06-14 11:57:44,130 INFO L125 PetriNetUnfolderBase]: For 120359/120365 co-relation queries the response was YES. [2024-06-14 11:57:44,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22508 conditions, 3426 events. 2224/3426 cut-off events. For 120359/120365 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17116 event pairs, 744 based on Foata normal form. 8/3434 useless extension candidates. Maximal degree in co-relation 22461. Up to 2934 conditions per place. [2024-06-14 11:57:44,152 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 82 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-14 11:57:44,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 148 transitions, 1526 flow [2024-06-14 11:57:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:57:44,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:57:44,153 INFO L175 Difference]: Start difference. First operand has 112 places, 120 transitions, 1066 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:57:44,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 148 transitions, 1526 flow [2024-06-14 11:57:44,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 148 transitions, 1384 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:44,218 INFO L231 Difference]: Finished difference. Result has 112 places, 120 transitions, 1052 flow [2024-06-14 11:57:44,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1052, PETRI_PLACES=112, PETRI_TRANSITIONS=120} [2024-06-14 11:57:44,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-14 11:57:44,218 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 120 transitions, 1052 flow [2024-06-14 11:57:44,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:44,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:44,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:44,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:57:44,219 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:44,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1363189495, now seen corresponding path program 1 times [2024-06-14 11:57:44,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:44,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316953205] [2024-06-14 11:57:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:44,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:45,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:45,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316953205] [2024-06-14 11:57:45,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316953205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:45,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:45,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935781525] [2024-06-14 11:57:45,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:45,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:45,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:45,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 120 transitions, 1052 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:45,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:45,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:45,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:46,390 INFO L124 PetriNetUnfolderBase]: 2207/3501 cut-off events. [2024-06-14 11:57:46,390 INFO L125 PetriNetUnfolderBase]: For 124536/124536 co-relation queries the response was YES. [2024-06-14 11:57:46,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22586 conditions, 3501 events. 2207/3501 cut-off events. For 124536/124536 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18057 event pairs, 719 based on Foata normal form. 2/3503 useless extension candidates. Maximal degree in co-relation 22538. Up to 3174 conditions per place. [2024-06-14 11:57:46,412 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2024-06-14 11:57:46,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 1479 flow [2024-06-14 11:57:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 11:57:46,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-14 11:57:46,413 INFO L175 Difference]: Start difference. First operand has 112 places, 120 transitions, 1052 flow. Second operand 9 states and 157 transitions. [2024-06-14 11:57:46,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 1479 flow [2024-06-14 11:57:46,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 153 transitions, 1335 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:46,483 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1033 flow [2024-06-14 11:57:46,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1033, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-14 11:57:46,483 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-14 11:57:46,484 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1033 flow [2024-06-14 11:57:46,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:46,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:46,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:46,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:57:46,484 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:46,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1402569215, now seen corresponding path program 1 times [2024-06-14 11:57:46,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:46,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080660371] [2024-06-14 11:57:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:46,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:47,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:47,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080660371] [2024-06-14 11:57:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080660371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:57:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124685686] [2024-06-14 11:57:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:47,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:57:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:57:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:57:47,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:47,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1033 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:47,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:47,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:47,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:48,069 INFO L124 PetriNetUnfolderBase]: 2306/3598 cut-off events. [2024-06-14 11:57:48,069 INFO L125 PetriNetUnfolderBase]: For 128870/128870 co-relation queries the response was YES. [2024-06-14 11:57:48,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23404 conditions, 3598 events. 2306/3598 cut-off events. For 128870/128870 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18062 event pairs, 781 based on Foata normal form. 2/3600 useless extension candidates. Maximal degree in co-relation 23354. Up to 3340 conditions per place. [2024-06-14 11:57:48,094 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 112 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2024-06-14 11:57:48,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 139 transitions, 1331 flow [2024-06-14 11:57:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:57:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:57:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 11:57:48,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-14 11:57:48,095 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1033 flow. Second operand 6 states and 103 transitions. [2024-06-14 11:57:48,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 139 transitions, 1331 flow [2024-06-14 11:57:48,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 139 transitions, 1251 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:48,163 INFO L231 Difference]: Finished difference. Result has 114 places, 129 transitions, 1015 flow [2024-06-14 11:57:48,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1015, PETRI_PLACES=114, PETRI_TRANSITIONS=129} [2024-06-14 11:57:48,163 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-14 11:57:48,164 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 129 transitions, 1015 flow [2024-06-14 11:57:48,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:48,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:48,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:48,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:57:48,164 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:48,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2030916933, now seen corresponding path program 1 times [2024-06-14 11:57:48,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:48,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712397087] [2024-06-14 11:57:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:48,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:49,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:49,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712397087] [2024-06-14 11:57:49,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712397087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:49,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:49,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320170332] [2024-06-14 11:57:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:49,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:49,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:49,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:49,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 1015 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:49,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:49,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:49,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:50,415 INFO L124 PetriNetUnfolderBase]: 2335/3640 cut-off events. [2024-06-14 11:57:50,415 INFO L125 PetriNetUnfolderBase]: For 155163/155163 co-relation queries the response was YES. [2024-06-14 11:57:50,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25421 conditions, 3640 events. 2335/3640 cut-off events. For 155163/155163 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18821 event pairs, 600 based on Foata normal form. 4/3640 useless extension candidates. Maximal degree in co-relation 25370. Up to 3232 conditions per place. [2024-06-14 11:57:50,439 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 126 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2024-06-14 11:57:50,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 162 transitions, 1433 flow [2024-06-14 11:57:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:57:50,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 11:57:50,440 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 1015 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:57:50,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 162 transitions, 1433 flow [2024-06-14 11:57:50,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 162 transitions, 1393 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:50,499 INFO L231 Difference]: Finished difference. Result has 118 places, 131 transitions, 1074 flow [2024-06-14 11:57:50,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1074, PETRI_PLACES=118, PETRI_TRANSITIONS=131} [2024-06-14 11:57:50,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-14 11:57:50,500 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 131 transitions, 1074 flow [2024-06-14 11:57:50,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:50,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:50,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:50,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:57:50,501 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:50,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2030856483, now seen corresponding path program 2 times [2024-06-14 11:57:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:50,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131527851] [2024-06-14 11:57:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:50,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:51,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:51,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131527851] [2024-06-14 11:57:51,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131527851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:51,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:51,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814113980] [2024-06-14 11:57:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:51,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:51,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:52,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:52,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 131 transitions, 1074 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:52,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:52,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:52,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:52,835 INFO L124 PetriNetUnfolderBase]: 2421/3775 cut-off events. [2024-06-14 11:57:52,835 INFO L125 PetriNetUnfolderBase]: For 166972/166976 co-relation queries the response was YES. [2024-06-14 11:57:52,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26691 conditions, 3775 events. 2421/3775 cut-off events. For 166972/166976 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19543 event pairs, 744 based on Foata normal form. 8/3779 useless extension candidates. Maximal degree in co-relation 26639. Up to 3337 conditions per place. [2024-06-14 11:57:52,861 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 130 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2024-06-14 11:57:52,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 179 transitions, 1708 flow [2024-06-14 11:57:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 11:57:52,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 11:57:52,863 INFO L175 Difference]: Start difference. First operand has 118 places, 131 transitions, 1074 flow. Second operand 9 states and 169 transitions. [2024-06-14 11:57:52,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 179 transitions, 1708 flow [2024-06-14 11:57:52,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 179 transitions, 1605 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:52,953 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1310 flow [2024-06-14 11:57:52,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1310, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-14 11:57:52,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 11:57:52,954 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1310 flow [2024-06-14 11:57:52,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:52,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:52,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:52,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:57:52,954 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:52,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash -599026661, now seen corresponding path program 3 times [2024-06-14 11:57:52,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:52,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678641635] [2024-06-14 11:57:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:52,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:54,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:54,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678641635] [2024-06-14 11:57:54,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678641635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:54,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638893892] [2024-06-14 11:57:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:54,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1310 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:54,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:55,293 INFO L124 PetriNetUnfolderBase]: 2541/3955 cut-off events. [2024-06-14 11:57:55,293 INFO L125 PetriNetUnfolderBase]: For 181596/181606 co-relation queries the response was YES. [2024-06-14 11:57:55,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 3955 events. 2541/3955 cut-off events. For 181596/181606 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20597 event pairs, 741 based on Foata normal form. 14/3965 useless extension candidates. Maximal degree in co-relation 28392. Up to 3464 conditions per place. [2024-06-14 11:57:55,321 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 142 selfloop transitions, 51 changer transitions 0/212 dead transitions. [2024-06-14 11:57:55,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 212 transitions, 2180 flow [2024-06-14 11:57:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:57:55,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 11:57:55,323 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1310 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:57:55,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 212 transitions, 2180 flow [2024-06-14 11:57:55,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 212 transitions, 2034 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-14 11:57:55,410 INFO L231 Difference]: Finished difference. Result has 134 places, 178 transitions, 1732 flow [2024-06-14 11:57:55,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=134, PETRI_TRANSITIONS=178} [2024-06-14 11:57:55,411 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-14 11:57:55,411 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 178 transitions, 1732 flow [2024-06-14 11:57:55,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:55,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:55,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:55,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:57:55,412 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:55,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1651565681, now seen corresponding path program 4 times [2024-06-14 11:57:55,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:55,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144333515] [2024-06-14 11:57:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:55,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144333515] [2024-06-14 11:57:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144333515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:56,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193972075] [2024-06-14 11:57:56,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:56,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:56,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:56,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:56,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 178 transitions, 1732 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:56,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:56,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:56,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:57,657 INFO L124 PetriNetUnfolderBase]: 2657/4129 cut-off events. [2024-06-14 11:57:57,657 INFO L125 PetriNetUnfolderBase]: For 195674/195682 co-relation queries the response was YES. [2024-06-14 11:57:57,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30285 conditions, 4129 events. 2657/4129 cut-off events. For 195674/195682 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 21568 event pairs, 744 based on Foata normal form. 12/4137 useless extension candidates. Maximal degree in co-relation 30224. Up to 3588 conditions per place. [2024-06-14 11:57:57,697 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 153 selfloop transitions, 73 changer transitions 0/245 dead transitions. [2024-06-14 11:57:57,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 245 transitions, 2805 flow [2024-06-14 11:57:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:57:57,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:57:57,699 INFO L175 Difference]: Start difference. First operand has 134 places, 178 transitions, 1732 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:57:57,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 245 transitions, 2805 flow [2024-06-14 11:57:57,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 245 transitions, 2591 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:57,836 INFO L231 Difference]: Finished difference. Result has 141 places, 213 transitions, 2305 flow [2024-06-14 11:57:57,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2305, PETRI_PLACES=141, PETRI_TRANSITIONS=213} [2024-06-14 11:57:57,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-14 11:57:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 213 transitions, 2305 flow [2024-06-14 11:57:57,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:57,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:57,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:57:57,837 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:57,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 413665995, now seen corresponding path program 1 times [2024-06-14 11:57:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265584145] [2024-06-14 11:57:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:58,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:58,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265584145] [2024-06-14 11:57:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265584145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:58,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:58,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782218823] [2024-06-14 11:57:58,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:58,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:58,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:59,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:57:59,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 213 transitions, 2305 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:59,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:59,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:57:59,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:59,878 INFO L124 PetriNetUnfolderBase]: 2858/4359 cut-off events. [2024-06-14 11:57:59,878 INFO L125 PetriNetUnfolderBase]: For 219085/219101 co-relation queries the response was YES. [2024-06-14 11:57:59,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32738 conditions, 4359 events. 2858/4359 cut-off events. For 219085/219101 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 22442 event pairs, 956 based on Foata normal form. 6/4343 useless extension candidates. Maximal degree in co-relation 32673. Up to 3942 conditions per place. [2024-06-14 11:57:59,909 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 171 selfloop transitions, 74 changer transitions 0/252 dead transitions. [2024-06-14 11:57:59,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 252 transitions, 2990 flow [2024-06-14 11:57:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:57:59,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 11:57:59,911 INFO L175 Difference]: Start difference. First operand has 141 places, 213 transitions, 2305 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:57:59,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 252 transitions, 2990 flow [2024-06-14 11:58:00,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 252 transitions, 2829 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:00,060 INFO L231 Difference]: Finished difference. Result has 146 places, 219 transitions, 2402 flow [2024-06-14 11:58:00,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2402, PETRI_PLACES=146, PETRI_TRANSITIONS=219} [2024-06-14 11:58:00,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-14 11:58:00,061 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 219 transitions, 2402 flow [2024-06-14 11:58:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:00,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:00,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:00,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:58:00,062 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:00,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash 521143809, now seen corresponding path program 1 times [2024-06-14 11:58:00,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:00,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507087667] [2024-06-14 11:58:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:00,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507087667] [2024-06-14 11:58:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507087667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:01,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:01,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929458918] [2024-06-14 11:58:01,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:01,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:01,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:01,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:01,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 219 transitions, 2402 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:01,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:01,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:01,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:01,943 INFO L124 PetriNetUnfolderBase]: 2850/4356 cut-off events. [2024-06-14 11:58:01,943 INFO L125 PetriNetUnfolderBase]: For 223790/223803 co-relation queries the response was YES. [2024-06-14 11:58:01,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32711 conditions, 4356 events. 2850/4356 cut-off events. For 223790/223803 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 22351 event pairs, 796 based on Foata normal form. 12/4356 useless extension candidates. Maximal degree in co-relation 32645. Up to 3935 conditions per place. [2024-06-14 11:58:01,977 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 189 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-14 11:58:01,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 263 transitions, 3150 flow [2024-06-14 11:58:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 11:58:01,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 11:58:01,978 INFO L175 Difference]: Start difference. First operand has 146 places, 219 transitions, 2402 flow. Second operand 10 states and 184 transitions. [2024-06-14 11:58:01,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 263 transitions, 3150 flow [2024-06-14 11:58:02,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 263 transitions, 2968 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:02,117 INFO L231 Difference]: Finished difference. Result has 150 places, 226 transitions, 2498 flow [2024-06-14 11:58:02,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2498, PETRI_PLACES=150, PETRI_TRANSITIONS=226} [2024-06-14 11:58:02,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-14 11:58:02,117 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 226 transitions, 2498 flow [2024-06-14 11:58:02,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:02,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:02,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:02,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:58:02,118 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:02,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:02,118 INFO L85 PathProgramCache]: Analyzing trace with hash 118755083, now seen corresponding path program 2 times [2024-06-14 11:58:02,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:02,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041244456] [2024-06-14 11:58:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:02,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:03,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:03,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041244456] [2024-06-14 11:58:03,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041244456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:03,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:03,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262515138] [2024-06-14 11:58:03,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:03,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:03,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 226 transitions, 2498 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:03,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:03,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:03,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:04,467 INFO L124 PetriNetUnfolderBase]: 2894/4425 cut-off events. [2024-06-14 11:58:04,467 INFO L125 PetriNetUnfolderBase]: For 231089/231097 co-relation queries the response was YES. [2024-06-14 11:58:04,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33703 conditions, 4425 events. 2894/4425 cut-off events. For 231089/231097 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 22695 event pairs, 763 based on Foata normal form. 10/4431 useless extension candidates. Maximal degree in co-relation 33635. Up to 3977 conditions per place. [2024-06-14 11:58:04,504 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 182 selfloop transitions, 81 changer transitions 0/270 dead transitions. [2024-06-14 11:58:04,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 270 transitions, 3294 flow [2024-06-14 11:58:04,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 11:58:04,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 11:58:04,506 INFO L175 Difference]: Start difference. First operand has 150 places, 226 transitions, 2498 flow. Second operand 9 states and 169 transitions. [2024-06-14 11:58:04,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 270 transitions, 3294 flow [2024-06-14 11:58:04,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 270 transitions, 3118 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:04,643 INFO L231 Difference]: Finished difference. Result has 154 places, 238 transitions, 2689 flow [2024-06-14 11:58:04,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2689, PETRI_PLACES=154, PETRI_TRANSITIONS=238} [2024-06-14 11:58:04,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-14 11:58:04,644 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 238 transitions, 2689 flow [2024-06-14 11:58:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:04,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:04,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:04,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:58:04,644 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:04,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1648764211, now seen corresponding path program 2 times [2024-06-14 11:58:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:04,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904165503] [2024-06-14 11:58:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:04,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:05,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904165503] [2024-06-14 11:58:05,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904165503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:05,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:05,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:05,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576357571] [2024-06-14 11:58:05,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:05,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:05,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:05,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:05,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 238 transitions, 2689 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:05,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:05,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:05,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:06,704 INFO L124 PetriNetUnfolderBase]: 2946/4513 cut-off events. [2024-06-14 11:58:06,704 INFO L125 PetriNetUnfolderBase]: For 248673/248681 co-relation queries the response was YES. [2024-06-14 11:58:06,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34701 conditions, 4513 events. 2946/4513 cut-off events. For 248673/248681 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 23352 event pairs, 761 based on Foata normal form. 12/4517 useless extension candidates. Maximal degree in co-relation 34632. Up to 4058 conditions per place. [2024-06-14 11:58:06,747 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 200 selfloop transitions, 74 changer transitions 0/281 dead transitions. [2024-06-14 11:58:06,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 281 transitions, 3454 flow [2024-06-14 11:58:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 11:58:06,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 11:58:06,749 INFO L175 Difference]: Start difference. First operand has 154 places, 238 transitions, 2689 flow. Second operand 10 states and 185 transitions. [2024-06-14 11:58:06,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 281 transitions, 3454 flow [2024-06-14 11:58:06,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 281 transitions, 3270 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:06,923 INFO L231 Difference]: Finished difference. Result has 158 places, 246 transitions, 2790 flow [2024-06-14 11:58:06,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2790, PETRI_PLACES=158, PETRI_TRANSITIONS=246} [2024-06-14 11:58:06,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-14 11:58:06,924 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 246 transitions, 2790 flow [2024-06-14 11:58:06,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:06,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:06,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:06,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:58:06,924 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:06,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1039762163, now seen corresponding path program 3 times [2024-06-14 11:58:06,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:06,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395860000] [2024-06-14 11:58:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:06,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:07,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:07,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395860000] [2024-06-14 11:58:07,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395860000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:07,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:07,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330847301] [2024-06-14 11:58:07,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:07,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:07,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:08,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:08,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 246 transitions, 2790 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:08,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:08,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:08,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:08,925 INFO L124 PetriNetUnfolderBase]: 3165/4848 cut-off events. [2024-06-14 11:58:08,925 INFO L125 PetriNetUnfolderBase]: For 274232/274236 co-relation queries the response was YES. [2024-06-14 11:58:08,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37744 conditions, 4848 events. 3165/4848 cut-off events. For 274232/274236 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 25403 event pairs, 694 based on Foata normal form. 12/4856 useless extension candidates. Maximal degree in co-relation 37673. Up to 3967 conditions per place. [2024-06-14 11:58:08,971 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 178 selfloop transitions, 126 changer transitions 0/311 dead transitions. [2024-06-14 11:58:08,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 311 transitions, 3981 flow [2024-06-14 11:58:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 11:58:08,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-14 11:58:08,973 INFO L175 Difference]: Start difference. First operand has 158 places, 246 transitions, 2790 flow. Second operand 10 states and 192 transitions. [2024-06-14 11:58:08,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 311 transitions, 3981 flow [2024-06-14 11:58:09,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 311 transitions, 3841 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:09,138 INFO L231 Difference]: Finished difference. Result has 167 places, 269 transitions, 3334 flow [2024-06-14 11:58:09,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3334, PETRI_PLACES=167, PETRI_TRANSITIONS=269} [2024-06-14 11:58:09,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-14 11:58:09,138 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 269 transitions, 3334 flow [2024-06-14 11:58:09,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:09,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:09,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:09,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:58:09,139 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:09,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1039755653, now seen corresponding path program 4 times [2024-06-14 11:58:09,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:09,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248388473] [2024-06-14 11:58:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:09,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:10,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248388473] [2024-06-14 11:58:10,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248388473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:10,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:10,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:10,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791043310] [2024-06-14 11:58:10,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:10,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:10,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:10,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:10,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:10,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 269 transitions, 3334 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:10,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:10,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:10,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:11,149 INFO L124 PetriNetUnfolderBase]: 3187/4890 cut-off events. [2024-06-14 11:58:11,150 INFO L125 PetriNetUnfolderBase]: For 290845/290849 co-relation queries the response was YES. [2024-06-14 11:58:11,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39830 conditions, 4890 events. 3187/4890 cut-off events. For 290845/290849 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25776 event pairs, 697 based on Foata normal form. 8/4894 useless extension candidates. Maximal degree in co-relation 39755. Up to 3976 conditions per place. [2024-06-14 11:58:11,197 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 185 selfloop transitions, 122 changer transitions 0/314 dead transitions. [2024-06-14 11:58:11,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 314 transitions, 4352 flow [2024-06-14 11:58:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 11:58:11,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-14 11:58:11,198 INFO L175 Difference]: Start difference. First operand has 167 places, 269 transitions, 3334 flow. Second operand 10 states and 193 transitions. [2024-06-14 11:58:11,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 314 transitions, 4352 flow [2024-06-14 11:58:11,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 314 transitions, 4194 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:11,412 INFO L231 Difference]: Finished difference. Result has 174 places, 273 transitions, 3574 flow [2024-06-14 11:58:11,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3574, PETRI_PLACES=174, PETRI_TRANSITIONS=273} [2024-06-14 11:58:11,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-14 11:58:11,413 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 273 transitions, 3574 flow [2024-06-14 11:58:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:11,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:11,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:58:11,414 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:11,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1039577713, now seen corresponding path program 5 times [2024-06-14 11:58:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122119312] [2024-06-14 11:58:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122119312] [2024-06-14 11:58:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122119312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771414691] [2024-06-14 11:58:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:12,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:12,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:12,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 273 transitions, 3574 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:12,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:12,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:12,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:13,736 INFO L124 PetriNetUnfolderBase]: 3012/4715 cut-off events. [2024-06-14 11:58:13,736 INFO L125 PetriNetUnfolderBase]: For 304090/304119 co-relation queries the response was YES. [2024-06-14 11:58:13,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39734 conditions, 4715 events. 3012/4715 cut-off events. For 304090/304119 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25588 event pairs, 693 based on Foata normal form. 13/4717 useless extension candidates. Maximal degree in co-relation 39656. Up to 4026 conditions per place. [2024-06-14 11:58:13,786 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 192 selfloop transitions, 87 changer transitions 0/307 dead transitions. [2024-06-14 11:58:13,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 307 transitions, 4321 flow [2024-06-14 11:58:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:58:13,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:58:13,787 INFO L175 Difference]: Start difference. First operand has 174 places, 273 transitions, 3574 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:58:13,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 307 transitions, 4321 flow [2024-06-14 11:58:14,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 307 transitions, 4065 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:14,085 INFO L231 Difference]: Finished difference. Result has 178 places, 276 transitions, 3635 flow [2024-06-14 11:58:14,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3635, PETRI_PLACES=178, PETRI_TRANSITIONS=276} [2024-06-14 11:58:14,085 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-14 11:58:14,086 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 276 transitions, 3635 flow [2024-06-14 11:58:14,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:14,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:14,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:14,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:58:14,086 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:14,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:14,087 INFO L85 PathProgramCache]: Analyzing trace with hash -653125, now seen corresponding path program 5 times [2024-06-14 11:58:14,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:14,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134313170] [2024-06-14 11:58:14,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:14,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:15,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:15,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134313170] [2024-06-14 11:58:15,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134313170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:15,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:15,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812761522] [2024-06-14 11:58:15,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:15,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:15,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 276 transitions, 3635 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:15,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:15,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:15,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:16,229 INFO L124 PetriNetUnfolderBase]: 3209/4928 cut-off events. [2024-06-14 11:58:16,230 INFO L125 PetriNetUnfolderBase]: For 316728/316752 co-relation queries the response was YES. [2024-06-14 11:58:16,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41286 conditions, 4928 events. 3209/4928 cut-off events. For 316728/316752 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26026 event pairs, 741 based on Foata normal form. 28/4951 useless extension candidates. Maximal degree in co-relation 41206. Up to 4009 conditions per place. [2024-06-14 11:58:16,276 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 197 selfloop transitions, 115 changer transitions 0/319 dead transitions. [2024-06-14 11:58:16,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 319 transitions, 4650 flow [2024-06-14 11:58:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 11:58:16,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 11:58:16,278 INFO L175 Difference]: Start difference. First operand has 178 places, 276 transitions, 3635 flow. Second operand 10 states and 194 transitions. [2024-06-14 11:58:16,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 319 transitions, 4650 flow [2024-06-14 11:58:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 319 transitions, 4409 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:16,531 INFO L231 Difference]: Finished difference. Result has 182 places, 279 transitions, 3720 flow [2024-06-14 11:58:16,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3720, PETRI_PLACES=182, PETRI_TRANSITIONS=279} [2024-06-14 11:58:16,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-14 11:58:16,532 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 279 transitions, 3720 flow [2024-06-14 11:58:16,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:16,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:16,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:16,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:58:16,533 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:16,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:16,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1543584554, now seen corresponding path program 1 times [2024-06-14 11:58:16,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:16,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482104808] [2024-06-14 11:58:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:16,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:17,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:17,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482104808] [2024-06-14 11:58:17,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482104808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:17,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:58:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613098166] [2024-06-14 11:58:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:17,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:58:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:17,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:58:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:58:17,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:58:17,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 279 transitions, 3720 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:17,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:17,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:58:17,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:18,254 INFO L124 PetriNetUnfolderBase]: 3481/5230 cut-off events. [2024-06-14 11:58:18,254 INFO L125 PetriNetUnfolderBase]: For 340760/340769 co-relation queries the response was YES. [2024-06-14 11:58:18,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43650 conditions, 5230 events. 3481/5230 cut-off events. For 340760/340769 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26643 event pairs, 1201 based on Foata normal form. 5/5223 useless extension candidates. Maximal degree in co-relation 43569. Up to 4989 conditions per place. [2024-06-14 11:58:18,302 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 254 selfloop transitions, 25 changer transitions 0/303 dead transitions. [2024-06-14 11:58:18,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 4488 flow [2024-06-14 11:58:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:58:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:58:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 11:58:18,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-14 11:58:18,303 INFO L175 Difference]: Start difference. First operand has 182 places, 279 transitions, 3720 flow. Second operand 7 states and 122 transitions. [2024-06-14 11:58:18,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 4488 flow [2024-06-14 11:58:18,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 303 transitions, 4259 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:18,632 INFO L231 Difference]: Finished difference. Result has 183 places, 285 transitions, 3626 flow [2024-06-14 11:58:18,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3626, PETRI_PLACES=183, PETRI_TRANSITIONS=285} [2024-06-14 11:58:18,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-14 11:58:18,633 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 285 transitions, 3626 flow [2024-06-14 11:58:18,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:18,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:18,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:18,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:58:18,637 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:18,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1188999529, now seen corresponding path program 3 times [2024-06-14 11:58:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704351746] [2024-06-14 11:58:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:19,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704351746] [2024-06-14 11:58:19,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704351746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:19,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:19,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859169826] [2024-06-14 11:58:19,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:19,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:19,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:19,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 285 transitions, 3626 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:19,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:19,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:19,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:21,010 INFO L124 PetriNetUnfolderBase]: 3253/4982 cut-off events. [2024-06-14 11:58:21,011 INFO L125 PetriNetUnfolderBase]: For 354096/354114 co-relation queries the response was YES. [2024-06-14 11:58:21,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42751 conditions, 4982 events. 3253/4982 cut-off events. For 354096/354114 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26390 event pairs, 932 based on Foata normal form. 6/4965 useless extension candidates. Maximal degree in co-relation 42669. Up to 4353 conditions per place. [2024-06-14 11:58:21,063 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 197 selfloop transitions, 107 changer transitions 0/313 dead transitions. [2024-06-14 11:58:21,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 313 transitions, 4330 flow [2024-06-14 11:58:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:58:21,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:58:21,065 INFO L175 Difference]: Start difference. First operand has 183 places, 285 transitions, 3626 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:58:21,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 313 transitions, 4330 flow [2024-06-14 11:58:21,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 313 transitions, 4227 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 11:58:21,415 INFO L231 Difference]: Finished difference. Result has 188 places, 285 transitions, 3777 flow [2024-06-14 11:58:21,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3777, PETRI_PLACES=188, PETRI_TRANSITIONS=285} [2024-06-14 11:58:21,415 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-14 11:58:21,415 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 285 transitions, 3777 flow [2024-06-14 11:58:21,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:21,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:21,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:58:21,416 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:21,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1733022751, now seen corresponding path program 6 times [2024-06-14 11:58:21,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:21,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974221533] [2024-06-14 11:58:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:21,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:22,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974221533] [2024-06-14 11:58:22,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974221533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:22,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:22,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:22,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090642220] [2024-06-14 11:58:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:22,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:22,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:22,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:22,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 285 transitions, 3777 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:22,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:22,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:22,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:23,439 INFO L124 PetriNetUnfolderBase]: 3262/5011 cut-off events. [2024-06-14 11:58:23,439 INFO L125 PetriNetUnfolderBase]: For 362621/362634 co-relation queries the response was YES. [2024-06-14 11:58:23,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43454 conditions, 5011 events. 3262/5011 cut-off events. For 362621/362634 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 26591 event pairs, 758 based on Foata normal form. 12/5017 useless extension candidates. Maximal degree in co-relation 43371. Up to 4362 conditions per place. [2024-06-14 11:58:23,491 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 219 selfloop transitions, 93 changer transitions 0/321 dead transitions. [2024-06-14 11:58:23,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 321 transitions, 4609 flow [2024-06-14 11:58:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 11:58:23,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 11:58:23,492 INFO L175 Difference]: Start difference. First operand has 188 places, 285 transitions, 3777 flow. Second operand 9 states and 167 transitions. [2024-06-14 11:58:23,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 321 transitions, 4609 flow [2024-06-14 11:58:23,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 321 transitions, 4290 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:23,804 INFO L231 Difference]: Finished difference. Result has 189 places, 288 transitions, 3764 flow [2024-06-14 11:58:23,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3764, PETRI_PLACES=189, PETRI_TRANSITIONS=288} [2024-06-14 11:58:23,804 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-14 11:58:23,804 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 288 transitions, 3764 flow [2024-06-14 11:58:23,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:23,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:23,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:23,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:58:23,805 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:23,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:23,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1848308961, now seen corresponding path program 6 times [2024-06-14 11:58:23,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:23,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877290544] [2024-06-14 11:58:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:23,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877290544] [2024-06-14 11:58:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877290544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:25,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923583905] [2024-06-14 11:58:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:25,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:25,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:25,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 288 transitions, 3764 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:25,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:25,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:25,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:26,198 INFO L124 PetriNetUnfolderBase]: 3073/4822 cut-off events. [2024-06-14 11:58:26,198 INFO L125 PetriNetUnfolderBase]: For 349306/349315 co-relation queries the response was YES. [2024-06-14 11:58:26,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42532 conditions, 4822 events. 3073/4822 cut-off events. For 349306/349315 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26301 event pairs, 682 based on Foata normal form. 8/4823 useless extension candidates. Maximal degree in co-relation 42448. Up to 4042 conditions per place. [2024-06-14 11:58:26,245 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 192 selfloop transitions, 95 changer transitions 0/317 dead transitions. [2024-06-14 11:58:26,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 317 transitions, 4512 flow [2024-06-14 11:58:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:58:26,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:58:26,250 INFO L175 Difference]: Start difference. First operand has 189 places, 288 transitions, 3764 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:58:26,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 317 transitions, 4512 flow [2024-06-14 11:58:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 317 transitions, 4270 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:26,563 INFO L231 Difference]: Finished difference. Result has 190 places, 290 transitions, 3808 flow [2024-06-14 11:58:26,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3808, PETRI_PLACES=190, PETRI_TRANSITIONS=290} [2024-06-14 11:58:26,564 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-14 11:58:26,564 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 290 transitions, 3808 flow [2024-06-14 11:58:26,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:26,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:26,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:26,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:58:26,565 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:26,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1848313921, now seen corresponding path program 7 times [2024-06-14 11:58:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656097474] [2024-06-14 11:58:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:27,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:27,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656097474] [2024-06-14 11:58:27,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656097474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:27,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:27,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:27,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671180230] [2024-06-14 11:58:27,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:27,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:27,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 290 transitions, 3808 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:27,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:27,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:28,728 INFO L124 PetriNetUnfolderBase]: 3482/5326 cut-off events. [2024-06-14 11:58:28,729 INFO L125 PetriNetUnfolderBase]: For 399553/399557 co-relation queries the response was YES. [2024-06-14 11:58:28,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 5326 events. 3482/5326 cut-off events. For 399553/399557 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 28526 event pairs, 785 based on Foata normal form. 8/5326 useless extension candidates. Maximal degree in co-relation 47644. Up to 4064 conditions per place. [2024-06-14 11:58:28,789 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 185 selfloop transitions, 144 changer transitions 0/338 dead transitions. [2024-06-14 11:58:28,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 338 transitions, 5256 flow [2024-06-14 11:58:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 11:58:28,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-14 11:58:28,790 INFO L175 Difference]: Start difference. First operand has 190 places, 290 transitions, 3808 flow. Second operand 9 states and 177 transitions. [2024-06-14 11:58:28,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 338 transitions, 5256 flow [2024-06-14 11:58:29,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 338 transitions, 4976 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:29,121 INFO L231 Difference]: Finished difference. Result has 195 places, 301 transitions, 4283 flow [2024-06-14 11:58:29,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4283, PETRI_PLACES=195, PETRI_TRANSITIONS=301} [2024-06-14 11:58:29,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-14 11:58:29,122 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 301 transitions, 4283 flow [2024-06-14 11:58:29,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:29,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:29,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:29,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:58:29,122 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:29,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1070727523, now seen corresponding path program 8 times [2024-06-14 11:58:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:29,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515159589] [2024-06-14 11:58:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:29,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:30,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:30,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515159589] [2024-06-14 11:58:30,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515159589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:30,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:30,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760884701] [2024-06-14 11:58:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:30,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:30,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 301 transitions, 4283 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:30,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:30,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:30,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:31,237 INFO L124 PetriNetUnfolderBase]: 3500/5364 cut-off events. [2024-06-14 11:58:31,237 INFO L125 PetriNetUnfolderBase]: For 408463/408467 co-relation queries the response was YES. [2024-06-14 11:58:31,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49403 conditions, 5364 events. 3500/5364 cut-off events. For 408463/408467 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28804 event pairs, 737 based on Foata normal form. 12/5368 useless extension candidates. Maximal degree in co-relation 49315. Up to 4073 conditions per place. [2024-06-14 11:58:31,294 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 165 selfloop transitions, 165 changer transitions 0/339 dead transitions. [2024-06-14 11:58:31,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 339 transitions, 5359 flow [2024-06-14 11:58:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 11:58:31,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 11:58:31,295 INFO L175 Difference]: Start difference. First operand has 195 places, 301 transitions, 4283 flow. Second operand 9 states and 173 transitions. [2024-06-14 11:58:31,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 339 transitions, 5359 flow [2024-06-14 11:58:31,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 339 transitions, 5197 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:31,647 INFO L231 Difference]: Finished difference. Result has 200 places, 304 transitions, 4579 flow [2024-06-14 11:58:31,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4579, PETRI_PLACES=200, PETRI_TRANSITIONS=304} [2024-06-14 11:58:31,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-14 11:58:31,648 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 304 transitions, 4579 flow [2024-06-14 11:58:31,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:31,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:31,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:31,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:58:31,648 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:31,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1429077393, now seen corresponding path program 9 times [2024-06-14 11:58:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:31,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147169403] [2024-06-14 11:58:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:31,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:32,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147169403] [2024-06-14 11:58:32,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147169403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:32,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:32,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:32,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079696504] [2024-06-14 11:58:32,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:32,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:32,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:32,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:32,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 304 transitions, 4579 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:32,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:32,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:32,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:33,821 INFO L124 PetriNetUnfolderBase]: 3490/5350 cut-off events. [2024-06-14 11:58:33,822 INFO L125 PetriNetUnfolderBase]: For 413080/413084 co-relation queries the response was YES. [2024-06-14 11:58:33,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49677 conditions, 5350 events. 3490/5350 cut-off events. For 413080/413084 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 28777 event pairs, 740 based on Foata normal form. 8/5350 useless extension candidates. Maximal degree in co-relation 49587. Up to 4069 conditions per place. [2024-06-14 11:58:33,876 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 173 selfloop transitions, 157 changer transitions 0/339 dead transitions. [2024-06-14 11:58:33,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 339 transitions, 5549 flow [2024-06-14 11:58:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:58:33,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:58:33,878 INFO L175 Difference]: Start difference. First operand has 200 places, 304 transitions, 4579 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:58:33,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 339 transitions, 5549 flow [2024-06-14 11:58:34,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 339 transitions, 5099 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:34,281 INFO L231 Difference]: Finished difference. Result has 203 places, 304 transitions, 4455 flow [2024-06-14 11:58:34,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4455, PETRI_PLACES=203, PETRI_TRANSITIONS=304} [2024-06-14 11:58:34,282 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-14 11:58:34,282 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 304 transitions, 4455 flow [2024-06-14 11:58:34,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:34,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:34,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:34,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:58:34,282 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:34,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -480776556, now seen corresponding path program 2 times [2024-06-14 11:58:34,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:34,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273130521] [2024-06-14 11:58:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:34,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:35,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273130521] [2024-06-14 11:58:35,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273130521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:35,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:35,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:58:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568299773] [2024-06-14 11:58:35,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:35,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:58:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:58:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:58:35,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:58:35,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 304 transitions, 4455 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:35,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:35,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:58:35,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:36,177 INFO L124 PetriNetUnfolderBase]: 3757/5640 cut-off events. [2024-06-14 11:58:36,177 INFO L125 PetriNetUnfolderBase]: For 422802/422816 co-relation queries the response was YES. [2024-06-14 11:58:36,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50599 conditions, 5640 events. 3757/5640 cut-off events. For 422802/422816 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29147 event pairs, 1249 based on Foata normal form. 5/5626 useless extension candidates. Maximal degree in co-relation 50508. Up to 5400 conditions per place. [2024-06-14 11:58:36,241 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 270 selfloop transitions, 27 changer transitions 0/321 dead transitions. [2024-06-14 11:58:36,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 321 transitions, 5223 flow [2024-06-14 11:58:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:58:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:58:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 11:58:36,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 11:58:36,243 INFO L175 Difference]: Start difference. First operand has 203 places, 304 transitions, 4455 flow. Second operand 6 states and 106 transitions. [2024-06-14 11:58:36,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 321 transitions, 5223 flow [2024-06-14 11:58:36,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 321 transitions, 4941 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:36,650 INFO L231 Difference]: Finished difference. Result has 202 places, 307 transitions, 4280 flow [2024-06-14 11:58:36,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4280, PETRI_PLACES=202, PETRI_TRANSITIONS=307} [2024-06-14 11:58:36,651 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-14 11:58:36,651 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 307 transitions, 4280 flow [2024-06-14 11:58:36,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:36,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:36,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:36,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:58:36,652 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:36,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 454317311, now seen corresponding path program 10 times [2024-06-14 11:58:36,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:36,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587748123] [2024-06-14 11:58:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:37,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:37,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587748123] [2024-06-14 11:58:37,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587748123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:37,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:37,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:37,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755763686] [2024-06-14 11:58:37,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:37,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:37,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:37,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:37,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 307 transitions, 4280 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:37,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:37,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:37,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:38,937 INFO L124 PetriNetUnfolderBase]: 3585/5511 cut-off events. [2024-06-14 11:58:38,937 INFO L125 PetriNetUnfolderBase]: For 433417/433421 co-relation queries the response was YES. [2024-06-14 11:58:38,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50324 conditions, 5511 events. 3585/5511 cut-off events. For 433417/433421 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 29937 event pairs, 730 based on Foata normal form. 12/5517 useless extension candidates. Maximal degree in co-relation 50232. Up to 3778 conditions per place. [2024-06-14 11:58:38,996 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 180 selfloop transitions, 169 changer transitions 0/359 dead transitions. [2024-06-14 11:58:38,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 359 transitions, 6006 flow [2024-06-14 11:58:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 11:58:38,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-14 11:58:38,998 INFO L175 Difference]: Start difference. First operand has 202 places, 307 transitions, 4280 flow. Second operand 9 states and 184 transitions. [2024-06-14 11:58:38,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 359 transitions, 6006 flow [2024-06-14 11:58:39,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 359 transitions, 5936 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:39,386 INFO L231 Difference]: Finished difference. Result has 208 places, 318 transitions, 4886 flow [2024-06-14 11:58:39,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=208, PETRI_TRANSITIONS=318} [2024-06-14 11:58:39,387 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-14 11:58:39,387 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 318 transitions, 4886 flow [2024-06-14 11:58:39,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:39,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:39,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:39,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:58:39,388 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:39,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 454310801, now seen corresponding path program 11 times [2024-06-14 11:58:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114280141] [2024-06-14 11:58:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:40,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:40,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114280141] [2024-06-14 11:58:40,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114280141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:40,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:40,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:40,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110883366] [2024-06-14 11:58:40,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:40,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:40,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:40,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:40,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 318 transitions, 4886 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:40,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:40,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:40,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:41,680 INFO L124 PetriNetUnfolderBase]: 3587/5519 cut-off events. [2024-06-14 11:58:41,681 INFO L125 PetriNetUnfolderBase]: For 437609/437613 co-relation queries the response was YES. [2024-06-14 11:58:41,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51846 conditions, 5519 events. 3587/5519 cut-off events. For 437609/437613 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 30032 event pairs, 793 based on Foata normal form. 8/5523 useless extension candidates. Maximal degree in co-relation 51753. Up to 3785 conditions per place. [2024-06-14 11:58:41,744 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 181 selfloop transitions, 171 changer transitions 0/362 dead transitions. [2024-06-14 11:58:41,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 362 transitions, 6440 flow [2024-06-14 11:58:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 11:58:41,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 11:58:41,745 INFO L175 Difference]: Start difference. First operand has 208 places, 318 transitions, 4886 flow. Second operand 9 states and 185 transitions. [2024-06-14 11:58:41,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 362 transitions, 6440 flow [2024-06-14 11:58:42,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 362 transitions, 6010 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:42,213 INFO L231 Difference]: Finished difference. Result has 212 places, 321 transitions, 4918 flow [2024-06-14 11:58:42,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4918, PETRI_PLACES=212, PETRI_TRANSITIONS=321} [2024-06-14 11:58:42,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-14 11:58:42,213 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 321 transitions, 4918 flow [2024-06-14 11:58:42,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:42,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:42,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:42,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:58:42,214 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:42,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 682218461, now seen corresponding path program 12 times [2024-06-14 11:58:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:42,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018009163] [2024-06-14 11:58:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:42,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:43,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018009163] [2024-06-14 11:58:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018009163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:43,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:43,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790015797] [2024-06-14 11:58:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:43,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:43,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:43,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 321 transitions, 4918 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:43,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:43,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:43,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:44,493 INFO L124 PetriNetUnfolderBase]: 3737/5752 cut-off events. [2024-06-14 11:58:44,493 INFO L125 PetriNetUnfolderBase]: For 474130/474134 co-relation queries the response was YES. [2024-06-14 11:58:44,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54462 conditions, 5752 events. 3737/5752 cut-off events. For 474130/474134 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31564 event pairs, 686 based on Foata normal form. 12/5758 useless extension candidates. Maximal degree in co-relation 54368. Up to 3873 conditions per place. [2024-06-14 11:58:44,557 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 168 selfloop transitions, 192 changer transitions 0/370 dead transitions. [2024-06-14 11:58:44,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 370 transitions, 6622 flow [2024-06-14 11:58:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 11:58:44,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:58:44,559 INFO L175 Difference]: Start difference. First operand has 212 places, 321 transitions, 4918 flow. Second operand 9 states and 183 transitions. [2024-06-14 11:58:44,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 370 transitions, 6622 flow [2024-06-14 11:58:45,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 370 transitions, 6226 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:45,142 INFO L231 Difference]: Finished difference. Result has 217 places, 329 transitions, 5155 flow [2024-06-14 11:58:45,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4528, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5155, PETRI_PLACES=217, PETRI_TRANSITIONS=329} [2024-06-14 11:58:45,142 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-14 11:58:45,142 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 329 transitions, 5155 flow [2024-06-14 11:58:45,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:45,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:45,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:58:45,143 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:45,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 682211951, now seen corresponding path program 13 times [2024-06-14 11:58:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:45,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514753075] [2024-06-14 11:58:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:46,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514753075] [2024-06-14 11:58:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514753075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:46,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:46,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:46,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11737647] [2024-06-14 11:58:46,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:46,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:46,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 329 transitions, 5155 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:46,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:46,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:47,529 INFO L124 PetriNetUnfolderBase]: 3759/5784 cut-off events. [2024-06-14 11:58:47,530 INFO L125 PetriNetUnfolderBase]: For 491043/491047 co-relation queries the response was YES. [2024-06-14 11:58:47,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55502 conditions, 5784 events. 3759/5784 cut-off events. For 491043/491047 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31751 event pairs, 681 based on Foata normal form. 8/5786 useless extension candidates. Maximal degree in co-relation 55406. Up to 3896 conditions per place. [2024-06-14 11:58:47,586 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 164 selfloop transitions, 201 changer transitions 0/375 dead transitions. [2024-06-14 11:58:47,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 375 transitions, 6838 flow [2024-06-14 11:58:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 11:58:47,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-14 11:58:47,588 INFO L175 Difference]: Start difference. First operand has 217 places, 329 transitions, 5155 flow. Second operand 9 states and 182 transitions. [2024-06-14 11:58:47,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 375 transitions, 6838 flow [2024-06-14 11:58:48,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 375 transitions, 6303 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:48,130 INFO L231 Difference]: Finished difference. Result has 221 places, 337 transitions, 5330 flow [2024-06-14 11:58:48,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5330, PETRI_PLACES=221, PETRI_TRANSITIONS=337} [2024-06-14 11:58:48,131 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-14 11:58:48,131 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 337 transitions, 5330 flow [2024-06-14 11:58:48,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:48,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:48,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:48,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:58:48,132 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:48,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:48,132 INFO L85 PathProgramCache]: Analyzing trace with hash 708186137, now seen corresponding path program 7 times [2024-06-14 11:58:48,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:48,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435352838] [2024-06-14 11:58:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:49,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435352838] [2024-06-14 11:58:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435352838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:49,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370995225] [2024-06-14 11:58:49,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:49,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:49,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:58:49,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 337 transitions, 5330 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:49,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:49,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:58:49,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:50,647 INFO L124 PetriNetUnfolderBase]: 3498/5479 cut-off events. [2024-06-14 11:58:50,647 INFO L125 PetriNetUnfolderBase]: For 509612/509636 co-relation queries the response was YES. [2024-06-14 11:58:50,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54472 conditions, 5479 events. 3498/5479 cut-off events. For 509612/509636 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 30794 event pairs, 699 based on Foata normal form. 8/5453 useless extension candidates. Maximal degree in co-relation 54373. Up to 4656 conditions per place. [2024-06-14 11:58:50,713 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 235 selfloop transitions, 98 changer transitions 0/364 dead transitions. [2024-06-14 11:58:50,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 364 transitions, 6164 flow [2024-06-14 11:58:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:58:50,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 11:58:50,715 INFO L175 Difference]: Start difference. First operand has 221 places, 337 transitions, 5330 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:58:50,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 364 transitions, 6164 flow [2024-06-14 11:58:51,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 364 transitions, 5699 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:51,263 INFO L231 Difference]: Finished difference. Result has 224 places, 339 transitions, 5154 flow [2024-06-14 11:58:51,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5154, PETRI_PLACES=224, PETRI_TRANSITIONS=339} [2024-06-14 11:58:51,264 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-14 11:58:51,264 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 339 transitions, 5154 flow [2024-06-14 11:58:51,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:51,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:51,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:58:51,264 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:51,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash 454137821, now seen corresponding path program 14 times [2024-06-14 11:58:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020683351] [2024-06-14 11:58:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:52,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:52,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020683351] [2024-06-14 11:58:52,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020683351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:52,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:52,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470799296] [2024-06-14 11:58:52,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:52,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:52,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:52,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 339 transitions, 5154 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:52,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:52,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:52,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:53,606 INFO L124 PetriNetUnfolderBase]: 3741/5758 cut-off events. [2024-06-14 11:58:53,607 INFO L125 PetriNetUnfolderBase]: For 518291/518295 co-relation queries the response was YES. [2024-06-14 11:58:53,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55111 conditions, 5758 events. 3741/5758 cut-off events. For 518291/518295 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 31592 event pairs, 736 based on Foata normal form. 8/5760 useless extension candidates. Maximal degree in co-relation 55011. Up to 3880 conditions per place. [2024-06-14 11:58:53,676 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 177 selfloop transitions, 193 changer transitions 0/380 dead transitions. [2024-06-14 11:58:53,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 380 transitions, 6724 flow [2024-06-14 11:58:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 11:58:53,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:58:53,678 INFO L175 Difference]: Start difference. First operand has 224 places, 339 transitions, 5154 flow. Second operand 9 states and 183 transitions. [2024-06-14 11:58:53,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 380 transitions, 6724 flow [2024-06-14 11:58:54,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 380 transitions, 6453 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:54,293 INFO L231 Difference]: Finished difference. Result has 227 places, 342 transitions, 5385 flow [2024-06-14 11:58:54,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5385, PETRI_PLACES=227, PETRI_TRANSITIONS=342} [2024-06-14 11:58:54,294 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 11:58:54,294 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 342 transitions, 5385 flow [2024-06-14 11:58:54,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:54,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:54,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:54,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:58:54,295 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:54,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:54,295 INFO L85 PathProgramCache]: Analyzing trace with hash 714857337, now seen corresponding path program 15 times [2024-06-14 11:58:54,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:54,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513328458] [2024-06-14 11:58:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:54,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:55,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513328458] [2024-06-14 11:58:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513328458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:55,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946436874] [2024-06-14 11:58:55,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:55,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:58:55,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 342 transitions, 5385 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:55,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:55,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:58:55,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:56,605 INFO L124 PetriNetUnfolderBase]: 3718/5723 cut-off events. [2024-06-14 11:58:56,605 INFO L125 PetriNetUnfolderBase]: For 533391/533395 co-relation queries the response was YES. [2024-06-14 11:58:56,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55202 conditions, 5723 events. 3718/5723 cut-off events. For 533391/533395 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 31360 event pairs, 666 based on Foata normal form. 16/5733 useless extension candidates. Maximal degree in co-relation 55101. Up to 3867 conditions per place. [2024-06-14 11:58:56,674 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 152 selfloop transitions, 216 changer transitions 0/378 dead transitions. [2024-06-14 11:58:56,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 378 transitions, 6661 flow [2024-06-14 11:58:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 11:58:56,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:58:56,675 INFO L175 Difference]: Start difference. First operand has 227 places, 342 transitions, 5385 flow. Second operand 9 states and 179 transitions. [2024-06-14 11:58:56,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 378 transitions, 6661 flow [2024-06-14 11:58:57,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 378 transitions, 6140 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:57,374 INFO L231 Difference]: Finished difference. Result has 230 places, 342 transitions, 5306 flow [2024-06-14 11:58:57,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4864, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5306, PETRI_PLACES=230, PETRI_TRANSITIONS=342} [2024-06-14 11:58:57,375 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-14 11:58:57,375 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 342 transitions, 5306 flow [2024-06-14 11:58:57,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:57,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:57,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:57,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:58:57,376 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:57,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash -814342786, now seen corresponding path program 3 times [2024-06-14 11:58:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:57,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463144565] [2024-06-14 11:58:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:57,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:58,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:58,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463144565] [2024-06-14 11:58:58,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463144565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:58,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:58,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:58:58,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952505276] [2024-06-14 11:58:58,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:58,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:58:58,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:58:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:58:58,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:58:58,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 342 transitions, 5306 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:58,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:58,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:58:58,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:59,384 INFO L124 PetriNetUnfolderBase]: 4097/6143 cut-off events. [2024-06-14 11:58:59,384 INFO L125 PetriNetUnfolderBase]: For 545470/545498 co-relation queries the response was YES. [2024-06-14 11:58:59,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56835 conditions, 6143 events. 4097/6143 cut-off events. For 545470/545498 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32151 event pairs, 1278 based on Foata normal form. 9/6119 useless extension candidates. Maximal degree in co-relation 56733. Up to 5902 conditions per place. [2024-06-14 11:58:59,459 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 300 selfloop transitions, 26 changer transitions 0/350 dead transitions. [2024-06-14 11:58:59,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 5982 flow [2024-06-14 11:58:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:58:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:58:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 11:58:59,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 11:58:59,460 INFO L175 Difference]: Start difference. First operand has 230 places, 342 transitions, 5306 flow. Second operand 6 states and 99 transitions. [2024-06-14 11:58:59,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 5982 flow [2024-06-14 11:59:00,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 350 transitions, 5498 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:00,096 INFO L231 Difference]: Finished difference. Result has 228 places, 342 transitions, 4880 flow [2024-06-14 11:59:00,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4880, PETRI_PLACES=228, PETRI_TRANSITIONS=342} [2024-06-14 11:59:00,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-14 11:59:00,097 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 342 transitions, 4880 flow [2024-06-14 11:59:00,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:00,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:00,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:00,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:59:00,098 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:00,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:00,098 INFO L85 PathProgramCache]: Analyzing trace with hash 667436776, now seen corresponding path program 1 times [2024-06-14 11:59:00,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:00,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698746557] [2024-06-14 11:59:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:00,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:00,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:00,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698746557] [2024-06-14 11:59:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698746557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:00,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:59:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906243296] [2024-06-14 11:59:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:00,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:59:00,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:00,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:59:00,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:59:01,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:01,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 342 transitions, 4880 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:01,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:01,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:01,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:01,986 INFO L124 PetriNetUnfolderBase]: 3776/5791 cut-off events. [2024-06-14 11:59:01,986 INFO L125 PetriNetUnfolderBase]: For 485868/485897 co-relation queries the response was YES. [2024-06-14 11:59:02,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51088 conditions, 5791 events. 3776/5791 cut-off events. For 485868/485897 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 31344 event pairs, 1320 based on Foata normal form. 10/5756 useless extension candidates. Maximal degree in co-relation 50985. Up to 5462 conditions per place. [2024-06-14 11:59:02,050 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 318 selfloop transitions, 17 changer transitions 0/360 dead transitions. [2024-06-14 11:59:02,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 360 transitions, 5788 flow [2024-06-14 11:59:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:59:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:59:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 11:59:02,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 11:59:02,051 INFO L175 Difference]: Start difference. First operand has 228 places, 342 transitions, 4880 flow. Second operand 6 states and 108 transitions. [2024-06-14 11:59:02,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 360 transitions, 5788 flow [2024-06-14 11:59:02,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 360 transitions, 5716 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:59:02,564 INFO L231 Difference]: Finished difference. Result has 229 places, 348 transitions, 4950 flow [2024-06-14 11:59:02,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4950, PETRI_PLACES=229, PETRI_TRANSITIONS=348} [2024-06-14 11:59:02,565 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-14 11:59:02,565 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 348 transitions, 4950 flow [2024-06-14 11:59:02,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:02,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:02,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:02,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:59:02,565 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:02,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 690800501, now seen corresponding path program 1 times [2024-06-14 11:59:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:02,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743713119] [2024-06-14 11:59:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:03,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743713119] [2024-06-14 11:59:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743713119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:03,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:03,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336774071] [2024-06-14 11:59:03,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:03,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:03,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:04,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:04,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 348 transitions, 4950 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:04,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:04,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:04,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:05,433 INFO L124 PetriNetUnfolderBase]: 3851/5879 cut-off events. [2024-06-14 11:59:05,434 INFO L125 PetriNetUnfolderBase]: For 521304/521315 co-relation queries the response was YES. [2024-06-14 11:59:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52343 conditions, 5879 events. 3851/5879 cut-off events. For 521304/521315 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 31498 event pairs, 1326 based on Foata normal form. 4/5849 useless extension candidates. Maximal degree in co-relation 52239. Up to 5544 conditions per place. [2024-06-14 11:59:05,494 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 347 selfloop transitions, 23 changer transitions 0/381 dead transitions. [2024-06-14 11:59:05,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 381 transitions, 5874 flow [2024-06-14 11:59:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 11:59:05,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931818181818182 [2024-06-14 11:59:05,496 INFO L175 Difference]: Start difference. First operand has 229 places, 348 transitions, 4950 flow. Second operand 10 states and 173 transitions. [2024-06-14 11:59:05,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 381 transitions, 5874 flow [2024-06-14 11:59:05,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 381 transitions, 5819 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 11:59:05,961 INFO L231 Difference]: Finished difference. Result has 237 places, 350 transitions, 5030 flow [2024-06-14 11:59:05,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5030, PETRI_PLACES=237, PETRI_TRANSITIONS=350} [2024-06-14 11:59:05,961 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 11:59:05,961 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 350 transitions, 5030 flow [2024-06-14 11:59:05,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:05,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:05,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:05,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:59:05,962 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:05,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1940676336, now seen corresponding path program 1 times [2024-06-14 11:59:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:05,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214637348] [2024-06-14 11:59:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:05,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:06,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:06,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214637348] [2024-06-14 11:59:06,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214637348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:06,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:06,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:59:06,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308872272] [2024-06-14 11:59:06,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:06,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:59:06,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:06,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:59:06,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:59:06,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:59:06,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 350 transitions, 5030 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:06,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:06,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:59:06,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:08,245 INFO L124 PetriNetUnfolderBase]: 4099/6143 cut-off events. [2024-06-14 11:59:08,245 INFO L125 PetriNetUnfolderBase]: For 589024/589048 co-relation queries the response was YES. [2024-06-14 11:59:08,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56833 conditions, 6143 events. 4099/6143 cut-off events. For 589024/589048 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32121 event pairs, 1279 based on Foata normal form. 5/6115 useless extension candidates. Maximal degree in co-relation 56727. Up to 5890 conditions per place. [2024-06-14 11:59:08,314 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 316 selfloop transitions, 34 changer transitions 0/374 dead transitions. [2024-06-14 11:59:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 374 transitions, 5986 flow [2024-06-14 11:59:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:59:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:59:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 11:59:08,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-14 11:59:08,315 INFO L175 Difference]: Start difference. First operand has 237 places, 350 transitions, 5030 flow. Second operand 7 states and 120 transitions. [2024-06-14 11:59:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 374 transitions, 5986 flow [2024-06-14 11:59:08,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 5869 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:08,865 INFO L231 Difference]: Finished difference. Result has 237 places, 359 transitions, 5109 flow [2024-06-14 11:59:08,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4913, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5109, PETRI_PLACES=237, PETRI_TRANSITIONS=359} [2024-06-14 11:59:08,866 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 11:59:08,866 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 359 transitions, 5109 flow [2024-06-14 11:59:08,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:08,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:08,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:08,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:59:08,867 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:08,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash 563032566, now seen corresponding path program 2 times [2024-06-14 11:59:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:08,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615488529] [2024-06-14 11:59:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:08,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:09,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:09,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615488529] [2024-06-14 11:59:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615488529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:09,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:09,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:59:09,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449396806] [2024-06-14 11:59:09,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:59:09,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:59:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:59:09,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:09,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 359 transitions, 5109 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:09,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:09,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:09,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:10,947 INFO L124 PetriNetUnfolderBase]: 3840/5867 cut-off events. [2024-06-14 11:59:10,948 INFO L125 PetriNetUnfolderBase]: For 534026/534055 co-relation queries the response was YES. [2024-06-14 11:59:11,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53204 conditions, 5867 events. 3840/5867 cut-off events. For 534026/534055 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 31641 event pairs, 1316 based on Foata normal form. 10/5824 useless extension candidates. Maximal degree in co-relation 53096. Up to 5548 conditions per place. [2024-06-14 11:59:11,039 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 327 selfloop transitions, 12 changer transitions 0/367 dead transitions. [2024-06-14 11:59:11,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 367 transitions, 5811 flow [2024-06-14 11:59:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:59:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:59:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 11:59:11,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 11:59:11,040 INFO L175 Difference]: Start difference. First operand has 237 places, 359 transitions, 5109 flow. Second operand 6 states and 102 transitions. [2024-06-14 11:59:11,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 367 transitions, 5811 flow [2024-06-14 11:59:11,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 367 transitions, 5716 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-14 11:59:11,704 INFO L231 Difference]: Finished difference. Result has 241 places, 359 transitions, 5044 flow [2024-06-14 11:59:11,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5044, PETRI_PLACES=241, PETRI_TRANSITIONS=359} [2024-06-14 11:59:11,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-14 11:59:11,705 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 359 transitions, 5044 flow [2024-06-14 11:59:11,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:11,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:11,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:11,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:59:11,705 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:11,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:11,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1606487841, now seen corresponding path program 1 times [2024-06-14 11:59:11,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:11,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502856033] [2024-06-14 11:59:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:11,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:12,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:12,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502856033] [2024-06-14 11:59:12,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502856033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:12,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:12,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:12,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85716490] [2024-06-14 11:59:12,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:12,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:13,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:13,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 359 transitions, 5044 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:13,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:13,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:13,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:14,337 INFO L124 PetriNetUnfolderBase]: 3829/5886 cut-off events. [2024-06-14 11:59:14,338 INFO L125 PetriNetUnfolderBase]: For 670010/670032 co-relation queries the response was YES. [2024-06-14 11:59:14,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58020 conditions, 5886 events. 3829/5886 cut-off events. For 670010/670032 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32509 event pairs, 828 based on Foata normal form. 12/5870 useless extension candidates. Maximal degree in co-relation 57909. Up to 5346 conditions per place. [2024-06-14 11:59:14,407 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 335 selfloop transitions, 57 changer transitions 0/404 dead transitions. [2024-06-14 11:59:14,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 404 transitions, 6048 flow [2024-06-14 11:59:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 11:59:14,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113636363636364 [2024-06-14 11:59:14,408 INFO L175 Difference]: Start difference. First operand has 241 places, 359 transitions, 5044 flow. Second operand 10 states and 181 transitions. [2024-06-14 11:59:14,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 404 transitions, 6048 flow [2024-06-14 11:59:14,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 404 transitions, 6016 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:59:14,986 INFO L231 Difference]: Finished difference. Result has 248 places, 366 transitions, 5255 flow [2024-06-14 11:59:14,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5255, PETRI_PLACES=248, PETRI_TRANSITIONS=366} [2024-06-14 11:59:14,987 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-14 11:59:14,987 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 366 transitions, 5255 flow [2024-06-14 11:59:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:14,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:14,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:59:14,987 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:14,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2079769865, now seen corresponding path program 2 times [2024-06-14 11:59:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:14,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236813247] [2024-06-14 11:59:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:14,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:16,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:16,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236813247] [2024-06-14 11:59:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236813247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:16,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922111335] [2024-06-14 11:59:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:16,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:16,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:16,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 366 transitions, 5255 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:16,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:16,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:16,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:17,655 INFO L124 PetriNetUnfolderBase]: 3873/5974 cut-off events. [2024-06-14 11:59:17,656 INFO L125 PetriNetUnfolderBase]: For 659669/659685 co-relation queries the response was YES. [2024-06-14 11:59:17,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58619 conditions, 5974 events. 3873/5974 cut-off events. For 659669/659685 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33169 event pairs, 1038 based on Foata normal form. 12/5968 useless extension candidates. Maximal degree in co-relation 58505. Up to 5422 conditions per place. [2024-06-14 11:59:17,731 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 339 selfloop transitions, 65 changer transitions 0/416 dead transitions. [2024-06-14 11:59:17,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 416 transitions, 6416 flow [2024-06-14 11:59:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 11:59:17,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-14 11:59:17,733 INFO L175 Difference]: Start difference. First operand has 248 places, 366 transitions, 5255 flow. Second operand 10 states and 183 transitions. [2024-06-14 11:59:17,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 416 transitions, 6416 flow [2024-06-14 11:59:18,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 416 transitions, 6146 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:18,748 INFO L231 Difference]: Finished difference. Result has 253 places, 378 transitions, 5382 flow [2024-06-14 11:59:18,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5069, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5382, PETRI_PLACES=253, PETRI_TRANSITIONS=378} [2024-06-14 11:59:18,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-14 11:59:18,749 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 378 transitions, 5382 flow [2024-06-14 11:59:18,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:18,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:18,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:18,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:59:18,750 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:18,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash -30871305, now seen corresponding path program 3 times [2024-06-14 11:59:18,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:18,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926011825] [2024-06-14 11:59:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:20,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:20,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926011825] [2024-06-14 11:59:20,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926011825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:20,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:20,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:20,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001919447] [2024-06-14 11:59:20,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:20,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:20,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:20,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:20,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 378 transitions, 5382 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:20,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:20,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:20,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:21,466 INFO L124 PetriNetUnfolderBase]: 3914/6028 cut-off events. [2024-06-14 11:59:21,466 INFO L125 PetriNetUnfolderBase]: For 701864/701882 co-relation queries the response was YES. [2024-06-14 11:59:21,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59852 conditions, 6028 events. 3914/6028 cut-off events. For 701864/701882 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33486 event pairs, 976 based on Foata normal form. 8/6009 useless extension candidates. Maximal degree in co-relation 59736. Up to 5363 conditions per place. [2024-06-14 11:59:21,539 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 322 selfloop transitions, 87 changer transitions 0/421 dead transitions. [2024-06-14 11:59:21,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 421 transitions, 6720 flow [2024-06-14 11:59:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 11:59:21,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 11:59:21,540 INFO L175 Difference]: Start difference. First operand has 253 places, 378 transitions, 5382 flow. Second operand 10 states and 187 transitions. [2024-06-14 11:59:21,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 421 transitions, 6720 flow [2024-06-14 11:59:22,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 421 transitions, 6539 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:22,396 INFO L231 Difference]: Finished difference. Result has 257 places, 382 transitions, 5552 flow [2024-06-14 11:59:22,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5552, PETRI_PLACES=257, PETRI_TRANSITIONS=382} [2024-06-14 11:59:22,397 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-14 11:59:22,397 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 382 transitions, 5552 flow [2024-06-14 11:59:22,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:22,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:22,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:59:22,397 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:22,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:22,398 INFO L85 PathProgramCache]: Analyzing trace with hash -29824900, now seen corresponding path program 1 times [2024-06-14 11:59:22,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:22,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634292637] [2024-06-14 11:59:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:22,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:23,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634292637] [2024-06-14 11:59:23,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634292637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:23,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:23,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:23,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292802029] [2024-06-14 11:59:23,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:23,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:23,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:23,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 382 transitions, 5552 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:23,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:23,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:23,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:25,149 INFO L124 PetriNetUnfolderBase]: 3925/6068 cut-off events. [2024-06-14 11:59:25,149 INFO L125 PetriNetUnfolderBase]: For 721420/721438 co-relation queries the response was YES. [2024-06-14 11:59:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60620 conditions, 6068 events. 3925/6068 cut-off events. For 721420/721438 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33983 event pairs, 965 based on Foata normal form. 6/6052 useless extension candidates. Maximal degree in co-relation 60503. Up to 5450 conditions per place. [2024-06-14 11:59:25,230 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 318 selfloop transitions, 92 changer transitions 0/422 dead transitions. [2024-06-14 11:59:25,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 422 transitions, 6626 flow [2024-06-14 11:59:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 11:59:25,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 11:59:25,232 INFO L175 Difference]: Start difference. First operand has 257 places, 382 transitions, 5552 flow. Second operand 10 states and 185 transitions. [2024-06-14 11:59:25,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 422 transitions, 6626 flow [2024-06-14 11:59:26,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 422 transitions, 6464 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 11:59:26,328 INFO L231 Difference]: Finished difference. Result has 262 places, 385 transitions, 5713 flow [2024-06-14 11:59:26,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5713, PETRI_PLACES=262, PETRI_TRANSITIONS=385} [2024-06-14 11:59:26,328 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-14 11:59:26,329 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 385 transitions, 5713 flow [2024-06-14 11:59:26,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:26,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:26,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:26,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:59:26,329 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:26,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash -29829705, now seen corresponding path program 4 times [2024-06-14 11:59:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:26,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490898637] [2024-06-14 11:59:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:27,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:27,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490898637] [2024-06-14 11:59:27,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490898637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:27,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:27,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:27,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424983537] [2024-06-14 11:59:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:27,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:27,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:27,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:27,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 385 transitions, 5713 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:27,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:27,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:27,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:29,106 INFO L124 PetriNetUnfolderBase]: 3917/6043 cut-off events. [2024-06-14 11:59:29,106 INFO L125 PetriNetUnfolderBase]: For 740471/740489 co-relation queries the response was YES. [2024-06-14 11:59:29,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60928 conditions, 6043 events. 3917/6043 cut-off events. For 740471/740489 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33698 event pairs, 969 based on Foata normal form. 8/6024 useless extension candidates. Maximal degree in co-relation 60809. Up to 5457 conditions per place. [2024-06-14 11:59:29,186 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 325 selfloop transitions, 85 changer transitions 0/422 dead transitions. [2024-06-14 11:59:29,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 422 transitions, 6669 flow [2024-06-14 11:59:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 11:59:29,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 11:59:29,187 INFO L175 Difference]: Start difference. First operand has 262 places, 385 transitions, 5713 flow. Second operand 10 states and 184 transitions. [2024-06-14 11:59:29,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 422 transitions, 6669 flow [2024-06-14 11:59:30,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 422 transitions, 6366 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:30,194 INFO L231 Difference]: Finished difference. Result has 264 places, 385 transitions, 5590 flow [2024-06-14 11:59:30,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5590, PETRI_PLACES=264, PETRI_TRANSITIONS=385} [2024-06-14 11:59:30,195 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-14 11:59:30,195 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 385 transitions, 5590 flow [2024-06-14 11:59:30,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:30,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:30,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:30,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:59:30,195 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:30,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1493824698, now seen corresponding path program 1 times [2024-06-14 11:59:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:30,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48643545] [2024-06-14 11:59:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:30,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:30,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:30,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48643545] [2024-06-14 11:59:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48643545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:30,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:30,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:59:30,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316423918] [2024-06-14 11:59:30,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:30,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:59:30,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:59:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:59:31,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:59:31,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 385 transitions, 5590 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:31,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:31,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:59:31,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:32,340 INFO L124 PetriNetUnfolderBase]: 4322/6501 cut-off events. [2024-06-14 11:59:32,341 INFO L125 PetriNetUnfolderBase]: For 734455/734489 co-relation queries the response was YES. [2024-06-14 11:59:32,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62309 conditions, 6501 events. 4322/6501 cut-off events. For 734455/734489 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 34495 event pairs, 1059 based on Foata normal form. 16/6484 useless extension candidates. Maximal degree in co-relation 62189. Up to 6059 conditions per place. [2024-06-14 11:59:32,420 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 331 selfloop transitions, 69 changer transitions 0/429 dead transitions. [2024-06-14 11:59:32,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 429 transitions, 7020 flow [2024-06-14 11:59:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 11:59:32,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 11:59:32,421 INFO L175 Difference]: Start difference. First operand has 264 places, 385 transitions, 5590 flow. Second operand 8 states and 145 transitions. [2024-06-14 11:59:32,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 429 transitions, 7020 flow [2024-06-14 11:59:33,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 429 transitions, 6814 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 11:59:33,354 INFO L231 Difference]: Finished difference. Result has 265 places, 403 transitions, 5881 flow [2024-06-14 11:59:33,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5881, PETRI_PLACES=265, PETRI_TRANSITIONS=403} [2024-06-14 11:59:33,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-14 11:59:33,355 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 403 transitions, 5881 flow [2024-06-14 11:59:33,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:33,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:33,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:33,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:59:33,355 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:33,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash -615435755, now seen corresponding path program 5 times [2024-06-14 11:59:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:33,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268406201] [2024-06-14 11:59:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:34,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:34,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268406201] [2024-06-14 11:59:34,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268406201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:34,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:34,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:34,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231832457] [2024-06-14 11:59:34,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:34,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:34,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:34,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:34,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 403 transitions, 5881 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:34,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:34,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:34,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:36,220 INFO L124 PetriNetUnfolderBase]: 4082/6301 cut-off events. [2024-06-14 11:59:36,220 INFO L125 PetriNetUnfolderBase]: For 753411/753421 co-relation queries the response was YES. [2024-06-14 11:59:36,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63100 conditions, 6301 events. 4082/6301 cut-off events. For 753411/753421 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 35245 event pairs, 813 based on Foata normal form. 14/6315 useless extension candidates. Maximal degree in co-relation 62977. Up to 5686 conditions per place. [2024-06-14 11:59:36,307 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 364 selfloop transitions, 78 changer transitions 0/457 dead transitions. [2024-06-14 11:59:36,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 457 transitions, 7100 flow [2024-06-14 11:59:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 11:59:36,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 11:59:36,308 INFO L175 Difference]: Start difference. First operand has 265 places, 403 transitions, 5881 flow. Second operand 10 states and 184 transitions. [2024-06-14 11:59:36,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 457 transitions, 7100 flow [2024-06-14 11:59:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 457 transitions, 7039 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 11:59:37,198 INFO L231 Difference]: Finished difference. Result has 275 places, 421 transitions, 6256 flow [2024-06-14 11:59:37,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6256, PETRI_PLACES=275, PETRI_TRANSITIONS=421} [2024-06-14 11:59:37,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-14 11:59:37,199 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 421 transitions, 6256 flow [2024-06-14 11:59:37,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:37,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:37,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:59:37,200 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:37,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash 424193813, now seen corresponding path program 6 times [2024-06-14 11:59:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:37,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357386926] [2024-06-14 11:59:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:38,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357386926] [2024-06-14 11:59:38,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357386926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:38,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:38,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308338907] [2024-06-14 11:59:38,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:38,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:38,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:38,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:38,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:38,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:38,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 421 transitions, 6256 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:38,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:38,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:38,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:40,409 INFO L124 PetriNetUnfolderBase]: 4110/6338 cut-off events. [2024-06-14 11:59:40,409 INFO L125 PetriNetUnfolderBase]: For 779239/779249 co-relation queries the response was YES. [2024-06-14 11:59:40,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64357 conditions, 6338 events. 4110/6338 cut-off events. For 779239/779249 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 35412 event pairs, 830 based on Foata normal form. 14/6345 useless extension candidates. Maximal degree in co-relation 64230. Up to 5718 conditions per place. [2024-06-14 11:59:40,493 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 351 selfloop transitions, 94 changer transitions 0/460 dead transitions. [2024-06-14 11:59:40,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 460 transitions, 7376 flow [2024-06-14 11:59:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 11:59:40,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 11:59:40,495 INFO L175 Difference]: Start difference. First operand has 275 places, 421 transitions, 6256 flow. Second operand 10 states and 185 transitions. [2024-06-14 11:59:40,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 460 transitions, 7376 flow [2024-06-14 11:59:41,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 460 transitions, 7194 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 11:59:41,564 INFO L231 Difference]: Finished difference. Result has 280 places, 425 transitions, 6382 flow [2024-06-14 11:59:41,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6382, PETRI_PLACES=280, PETRI_TRANSITIONS=425} [2024-06-14 11:59:41,565 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-14 11:59:41,565 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 425 transitions, 6382 flow [2024-06-14 11:59:41,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:41,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:41,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:41,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:59:41,566 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:41,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1841461588, now seen corresponding path program 2 times [2024-06-14 11:59:41,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:41,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642686254] [2024-06-14 11:59:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642686254] [2024-06-14 11:59:42,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642686254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:42,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:42,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083363021] [2024-06-14 11:59:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:42,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:43,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:43,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 425 transitions, 6382 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:43,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:43,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:43,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:44,439 INFO L124 PetriNetUnfolderBase]: 4112/6355 cut-off events. [2024-06-14 11:59:44,439 INFO L125 PetriNetUnfolderBase]: For 793315/793325 co-relation queries the response was YES. [2024-06-14 11:59:44,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64714 conditions, 6355 events. 4112/6355 cut-off events. For 793315/793325 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 35662 event pairs, 830 based on Foata normal form. 12/6367 useless extension candidates. Maximal degree in co-relation 64586. Up to 5707 conditions per place. [2024-06-14 11:59:44,524 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 349 selfloop transitions, 102 changer transitions 0/466 dead transitions. [2024-06-14 11:59:44,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 466 transitions, 7588 flow [2024-06-14 11:59:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 11:59:44,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-14 11:59:44,525 INFO L175 Difference]: Start difference. First operand has 280 places, 425 transitions, 6382 flow. Second operand 10 states and 186 transitions. [2024-06-14 11:59:44,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 466 transitions, 7588 flow [2024-06-14 11:59:45,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 466 transitions, 7326 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:45,509 INFO L231 Difference]: Finished difference. Result has 282 places, 431 transitions, 6526 flow [2024-06-14 11:59:45,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6526, PETRI_PLACES=282, PETRI_TRANSITIONS=431} [2024-06-14 11:59:45,509 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-14 11:59:45,509 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 431 transitions, 6526 flow [2024-06-14 11:59:45,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:45,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:45,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:45,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:59:45,510 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:45,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash 341073203, now seen corresponding path program 7 times [2024-06-14 11:59:45,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:45,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596978577] [2024-06-14 11:59:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:45,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:46,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:46,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596978577] [2024-06-14 11:59:46,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596978577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:46,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:46,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:46,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088497779] [2024-06-14 11:59:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:46,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:46,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:46,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:47,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:47,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 431 transitions, 6526 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:47,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:47,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:48,558 INFO L124 PetriNetUnfolderBase]: 4140/6385 cut-off events. [2024-06-14 11:59:48,558 INFO L125 PetriNetUnfolderBase]: For 823175/823185 co-relation queries the response was YES. [2024-06-14 11:59:48,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65508 conditions, 6385 events. 4140/6385 cut-off events. For 823175/823185 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35736 event pairs, 831 based on Foata normal form. 14/6391 useless extension candidates. Maximal degree in co-relation 65379. Up to 5674 conditions per place. [2024-06-14 11:59:48,654 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 357 selfloop transitions, 98 changer transitions 0/470 dead transitions. [2024-06-14 11:59:48,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 470 transitions, 7666 flow [2024-06-14 11:59:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 11:59:48,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-14 11:59:48,655 INFO L175 Difference]: Start difference. First operand has 282 places, 431 transitions, 6526 flow. Second operand 10 states and 186 transitions. [2024-06-14 11:59:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 470 transitions, 7666 flow [2024-06-14 11:59:49,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 470 transitions, 7384 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-14 11:59:49,774 INFO L231 Difference]: Finished difference. Result has 283 places, 435 transitions, 6563 flow [2024-06-14 11:59:49,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6563, PETRI_PLACES=283, PETRI_TRANSITIONS=435} [2024-06-14 11:59:49,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-14 11:59:49,775 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 435 transitions, 6563 flow [2024-06-14 11:59:49,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:49,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:49,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:49,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:59:49,776 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:49,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2127317253, now seen corresponding path program 8 times [2024-06-14 11:59:49,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:49,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848886646] [2024-06-14 11:59:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:49,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848886646] [2024-06-14 11:59:51,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848886646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:51,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:51,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:51,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817615711] [2024-06-14 11:59:51,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:51,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:51,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 11:59:51,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 435 transitions, 6563 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:51,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:51,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 11:59:51,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:52,630 INFO L124 PetriNetUnfolderBase]: 4157/6418 cut-off events. [2024-06-14 11:59:52,631 INFO L125 PetriNetUnfolderBase]: For 848425/848437 co-relation queries the response was YES. [2024-06-14 11:59:52,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66269 conditions, 6418 events. 4157/6418 cut-off events. For 848425/848437 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 35986 event pairs, 806 based on Foata normal form. 16/6429 useless extension candidates. Maximal degree in co-relation 66139. Up to 5639 conditions per place. [2024-06-14 11:59:52,723 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 336 selfloop transitions, 122 changer transitions 0/473 dead transitions. [2024-06-14 11:59:52,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 473 transitions, 7717 flow [2024-06-14 11:59:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 11:59:52,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-14 11:59:52,724 INFO L175 Difference]: Start difference. First operand has 283 places, 435 transitions, 6563 flow. Second operand 10 states and 186 transitions. [2024-06-14 11:59:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 473 transitions, 7717 flow [2024-06-14 11:59:54,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 473 transitions, 7442 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:54,076 INFO L231 Difference]: Finished difference. Result has 285 places, 437 transitions, 6641 flow [2024-06-14 11:59:54,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6641, PETRI_PLACES=285, PETRI_TRANSITIONS=437} [2024-06-14 11:59:54,077 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-14 11:59:54,077 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 437 transitions, 6641 flow [2024-06-14 11:59:54,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:54,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:54,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:54,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:59:54,077 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:54,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash -287450282, now seen corresponding path program 1 times [2024-06-14 11:59:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:54,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520098355] [2024-06-14 11:59:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:55,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520098355] [2024-06-14 11:59:55,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520098355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:55,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:55,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:59:55,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034266317] [2024-06-14 11:59:55,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:55,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:59:55,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:59:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:59:55,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 11:59:55,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 437 transitions, 6641 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 11:59:55,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:55,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 11:59:55,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:57,363 INFO L124 PetriNetUnfolderBase]: 4596/6898 cut-off events. [2024-06-14 11:59:57,364 INFO L125 PetriNetUnfolderBase]: For 869307/869319 co-relation queries the response was YES. [2024-06-14 11:59:57,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67959 conditions, 6898 events. 4596/6898 cut-off events. For 869307/869319 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36765 event pairs, 872 based on Foata normal form. 18/6916 useless extension candidates. Maximal degree in co-relation 67828. Up to 5884 conditions per place. [2024-06-14 11:59:57,448 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 317 selfloop transitions, 172 changer transitions 0/502 dead transitions. [2024-06-14 11:59:57,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 502 transitions, 8178 flow [2024-06-14 11:59:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:59:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:59:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-14 11:59:57,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40702479338842973 [2024-06-14 11:59:57,449 INFO L175 Difference]: Start difference. First operand has 285 places, 437 transitions, 6641 flow. Second operand 11 states and 197 transitions. [2024-06-14 11:59:57,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 502 transitions, 8178 flow [2024-06-14 11:59:58,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 502 transitions, 7776 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:58,649 INFO L231 Difference]: Finished difference. Result has 290 places, 460 transitions, 7042 flow [2024-06-14 11:59:58,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7042, PETRI_PLACES=290, PETRI_TRANSITIONS=460} [2024-06-14 11:59:58,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-14 11:59:58,650 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 460 transitions, 7042 flow [2024-06-14 11:59:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 11:59:58,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:58,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:58,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:59:58,650 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:58,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2132823783, now seen corresponding path program 9 times [2024-06-14 11:59:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:58,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553176842] [2024-06-14 11:59:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:58,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:00,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:00,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553176842] [2024-06-14 12:00:00,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553176842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:00,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:00,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:00,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709274166] [2024-06-14 12:00:00,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:00,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:00,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:00,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:00,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 460 transitions, 7042 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:00,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:00,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:00,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:01,929 INFO L124 PetriNetUnfolderBase]: 4188/6454 cut-off events. [2024-06-14 12:00:01,929 INFO L125 PetriNetUnfolderBase]: For 880348/880380 co-relation queries the response was YES. [2024-06-14 12:00:01,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66813 conditions, 6454 events. 4188/6454 cut-off events. For 880348/880380 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36060 event pairs, 799 based on Foata normal form. 21/6475 useless extension candidates. Maximal degree in co-relation 66679. Up to 5664 conditions per place. [2024-06-14 12:00:02,028 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 370 selfloop transitions, 112 changer transitions 0/498 dead transitions. [2024-06-14 12:00:02,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 498 transitions, 8248 flow [2024-06-14 12:00:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:00:02,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 12:00:02,029 INFO L175 Difference]: Start difference. First operand has 290 places, 460 transitions, 7042 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:00:02,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 498 transitions, 8248 flow [2024-06-14 12:00:03,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 498 transitions, 8067 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:03,309 INFO L231 Difference]: Finished difference. Result has 294 places, 462 transitions, 7198 flow [2024-06-14 12:00:03,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6861, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7198, PETRI_PLACES=294, PETRI_TRANSITIONS=462} [2024-06-14 12:00:03,309 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-14 12:00:03,310 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 462 transitions, 7198 flow [2024-06-14 12:00:03,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:03,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:03,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:03,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:00:03,310 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:03,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:03,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2132827503, now seen corresponding path program 10 times [2024-06-14 12:00:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:03,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187834377] [2024-06-14 12:00:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:04,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:04,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187834377] [2024-06-14 12:00:04,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187834377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:04,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:04,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135276682] [2024-06-14 12:00:04,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:04,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:04,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 462 transitions, 7198 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:04,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:04,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:04,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:06,355 INFO L124 PetriNetUnfolderBase]: 4205/6481 cut-off events. [2024-06-14 12:00:06,356 INFO L125 PetriNetUnfolderBase]: For 909922/909954 co-relation queries the response was YES. [2024-06-14 12:00:06,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67811 conditions, 6481 events. 4205/6481 cut-off events. For 909922/909954 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 36242 event pairs, 804 based on Foata normal form. 21/6502 useless extension candidates. Maximal degree in co-relation 67675. Up to 5632 conditions per place. [2024-06-14 12:00:06,458 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 367 selfloop transitions, 117 changer transitions 0/500 dead transitions. [2024-06-14 12:00:06,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 500 transitions, 8408 flow [2024-06-14 12:00:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:00:06,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 12:00:06,460 INFO L175 Difference]: Start difference. First operand has 294 places, 462 transitions, 7198 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:00:06,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 500 transitions, 8408 flow [2024-06-14 12:00:07,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 500 transitions, 8147 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:07,818 INFO L231 Difference]: Finished difference. Result has 297 places, 464 transitions, 7288 flow [2024-06-14 12:00:07,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6937, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7288, PETRI_PLACES=297, PETRI_TRANSITIONS=464} [2024-06-14 12:00:07,818 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-14 12:00:07,818 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 464 transitions, 7288 flow [2024-06-14 12:00:07,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:07,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:07,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:00:07,819 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:07,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 73461094, now seen corresponding path program 2 times [2024-06-14 12:00:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758848440] [2024-06-14 12:00:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:07,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:08,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:08,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758848440] [2024-06-14 12:00:08,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758848440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:08,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:08,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:08,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896744891] [2024-06-14 12:00:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:08,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:08,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:08,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:00:08,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 464 transitions, 7288 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:08,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:08,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:00:08,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:10,383 INFO L124 PetriNetUnfolderBase]: 4554/6869 cut-off events. [2024-06-14 12:00:10,383 INFO L125 PetriNetUnfolderBase]: For 938786/938821 co-relation queries the response was YES. [2024-06-14 12:00:10,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69638 conditions, 6869 events. 4554/6869 cut-off events. For 938786/938821 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 37190 event pairs, 983 based on Foata normal form. 12/6846 useless extension candidates. Maximal degree in co-relation 69501. Up to 6347 conditions per place. [2024-06-14 12:00:10,498 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 387 selfloop transitions, 82 changer transitions 0/508 dead transitions. [2024-06-14 12:00:10,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 508 transitions, 8967 flow [2024-06-14 12:00:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:00:10,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:00:10,500 INFO L175 Difference]: Start difference. First operand has 297 places, 464 transitions, 7288 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:00:10,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 508 transitions, 8967 flow [2024-06-14 12:00:11,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 508 transitions, 8634 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:11,960 INFO L231 Difference]: Finished difference. Result has 297 places, 480 transitions, 7355 flow [2024-06-14 12:00:11,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6955, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7355, PETRI_PLACES=297, PETRI_TRANSITIONS=480} [2024-06-14 12:00:11,961 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-14 12:00:11,961 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 480 transitions, 7355 flow [2024-06-14 12:00:11,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:11,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:11,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:11,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:00:11,962 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:11,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash 639723214, now seen corresponding path program 3 times [2024-06-14 12:00:11,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265548443] [2024-06-14 12:00:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:11,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:12,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265548443] [2024-06-14 12:00:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265548443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:12,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:12,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:12,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500713461] [2024-06-14 12:00:12,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:12,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:12,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:12,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:00:12,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 480 transitions, 7355 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:00:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:14,729 INFO L124 PetriNetUnfolderBase]: 4548/6860 cut-off events. [2024-06-14 12:00:14,730 INFO L125 PetriNetUnfolderBase]: For 952036/952073 co-relation queries the response was YES. [2024-06-14 12:00:14,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69324 conditions, 6860 events. 4548/6860 cut-off events. For 952036/952073 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 37073 event pairs, 954 based on Foata normal form. 14/6839 useless extension candidates. Maximal degree in co-relation 69186. Up to 6342 conditions per place. [2024-06-14 12:00:14,843 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 376 selfloop transitions, 88 changer transitions 0/503 dead transitions. [2024-06-14 12:00:14,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 503 transitions, 8651 flow [2024-06-14 12:00:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:00:14,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-14 12:00:14,844 INFO L175 Difference]: Start difference. First operand has 297 places, 480 transitions, 7355 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:00:14,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 503 transitions, 8651 flow [2024-06-14 12:00:16,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 503 transitions, 8484 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:16,235 INFO L231 Difference]: Finished difference. Result has 302 places, 480 transitions, 7372 flow [2024-06-14 12:00:16,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7188, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7372, PETRI_PLACES=302, PETRI_TRANSITIONS=480} [2024-06-14 12:00:16,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-14 12:00:16,236 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 480 transitions, 7372 flow [2024-06-14 12:00:16,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:16,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:16,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:16,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:00:16,236 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:16,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:16,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1499430161, now seen corresponding path program 11 times [2024-06-14 12:00:16,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:16,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652759636] [2024-06-14 12:00:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:17,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:17,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652759636] [2024-06-14 12:00:17,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652759636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:17,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:17,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:17,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145790758] [2024-06-14 12:00:17,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:17,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:17,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:17,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:17,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 480 transitions, 7372 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:17,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:17,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:17,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:19,419 INFO L124 PetriNetUnfolderBase]: 4319/6630 cut-off events. [2024-06-14 12:00:19,419 INFO L125 PetriNetUnfolderBase]: For 1062922/1062966 co-relation queries the response was YES. [2024-06-14 12:00:19,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71039 conditions, 6630 events. 4319/6630 cut-off events. For 1062922/1062966 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 37278 event pairs, 880 based on Foata normal form. 19/6619 useless extension candidates. Maximal degree in co-relation 70900. Up to 5766 conditions per place. [2024-06-14 12:00:19,536 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 395 selfloop transitions, 98 changer transitions 0/515 dead transitions. [2024-06-14 12:00:19,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 515 transitions, 8588 flow [2024-06-14 12:00:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:00:19,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 12:00:19,537 INFO L175 Difference]: Start difference. First operand has 302 places, 480 transitions, 7372 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:00:19,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 515 transitions, 8588 flow [2024-06-14 12:00:20,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 515 transitions, 8406 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:20,893 INFO L231 Difference]: Finished difference. Result has 305 places, 482 transitions, 7525 flow [2024-06-14 12:00:20,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7190, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7525, PETRI_PLACES=305, PETRI_TRANSITIONS=482} [2024-06-14 12:00:20,894 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-14 12:00:20,894 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 482 transitions, 7525 flow [2024-06-14 12:00:20,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:20,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:20,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:20,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:00:20,895 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:20,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1609981950, now seen corresponding path program 1 times [2024-06-14 12:00:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:20,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346063076] [2024-06-14 12:00:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:21,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346063076] [2024-06-14 12:00:21,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346063076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:21,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:21,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:21,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623423709] [2024-06-14 12:00:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:21,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:21,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:21,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:00:21,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 482 transitions, 7525 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:21,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:21,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:00:21,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:23,708 INFO L124 PetriNetUnfolderBase]: 4612/6953 cut-off events. [2024-06-14 12:00:23,708 INFO L125 PetriNetUnfolderBase]: For 1013827/1013862 co-relation queries the response was YES. [2024-06-14 12:00:23,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71382 conditions, 6953 events. 4612/6953 cut-off events. For 1013827/1013862 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 37732 event pairs, 993 based on Foata normal form. 12/6930 useless extension candidates. Maximal degree in co-relation 71242. Up to 6352 conditions per place. [2024-06-14 12:00:23,816 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 395 selfloop transitions, 94 changer transitions 0/529 dead transitions. [2024-06-14 12:00:23,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 529 transitions, 9270 flow [2024-06-14 12:00:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:00:23,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:00:23,818 INFO L175 Difference]: Start difference. First operand has 305 places, 482 transitions, 7525 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:00:23,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 529 transitions, 9270 flow [2024-06-14 12:00:25,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 529 transitions, 8959 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:25,425 INFO L231 Difference]: Finished difference. Result has 308 places, 497 transitions, 7675 flow [2024-06-14 12:00:25,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7232, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7675, PETRI_PLACES=308, PETRI_TRANSITIONS=497} [2024-06-14 12:00:25,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-14 12:00:25,426 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 497 transitions, 7675 flow [2024-06-14 12:00:25,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:25,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:25,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:25,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:00:25,426 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:25,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1795718183, now seen corresponding path program 12 times [2024-06-14 12:00:25,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:25,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289751237] [2024-06-14 12:00:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:26,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:26,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289751237] [2024-06-14 12:00:26,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289751237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:26,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:26,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990115333] [2024-06-14 12:00:26,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:26,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:26,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 497 transitions, 7675 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:26,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:26,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:26,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:28,644 INFO L124 PetriNetUnfolderBase]: 4360/6695 cut-off events. [2024-06-14 12:00:28,644 INFO L125 PetriNetUnfolderBase]: For 1027924/1027964 co-relation queries the response was YES. [2024-06-14 12:00:28,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71498 conditions, 6695 events. 4360/6695 cut-off events. For 1027924/1027964 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 37768 event pairs, 1030 based on Foata normal form. 13/6666 useless extension candidates. Maximal degree in co-relation 71356. Up to 5665 conditions per place. [2024-06-14 12:00:28,733 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 382 selfloop transitions, 132 changer transitions 0/536 dead transitions. [2024-06-14 12:00:28,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 536 transitions, 9297 flow [2024-06-14 12:00:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:00:28,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:00:28,734 INFO L175 Difference]: Start difference. First operand has 308 places, 497 transitions, 7675 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:00:28,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 536 transitions, 9297 flow [2024-06-14 12:00:30,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 536 transitions, 9223 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:30,028 INFO L231 Difference]: Finished difference. Result has 314 places, 501 transitions, 8091 flow [2024-06-14 12:00:30,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7601, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8091, PETRI_PLACES=314, PETRI_TRANSITIONS=501} [2024-06-14 12:00:30,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-14 12:00:30,028 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 501 transitions, 8091 flow [2024-06-14 12:00:30,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:30,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:30,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:30,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:00:30,029 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:30,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:30,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1499339796, now seen corresponding path program 3 times [2024-06-14 12:00:30,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:30,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676580138] [2024-06-14 12:00:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:30,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676580138] [2024-06-14 12:00:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676580138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:31,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:31,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:31,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188675898] [2024-06-14 12:00:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:31,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:31,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 501 transitions, 8091 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:31,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:31,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:31,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:33,334 INFO L124 PetriNetUnfolderBase]: 4355/6710 cut-off events. [2024-06-14 12:00:33,335 INFO L125 PetriNetUnfolderBase]: For 1048312/1048352 co-relation queries the response was YES. [2024-06-14 12:00:33,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72367 conditions, 6710 events. 4355/6710 cut-off events. For 1048312/1048352 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38172 event pairs, 1042 based on Foata normal form. 11/6689 useless extension candidates. Maximal degree in co-relation 72223. Up to 5834 conditions per place. [2024-06-14 12:00:33,467 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 363 selfloop transitions, 152 changer transitions 0/537 dead transitions. [2024-06-14 12:00:33,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 537 transitions, 9371 flow [2024-06-14 12:00:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:00:33,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:00:33,469 INFO L175 Difference]: Start difference. First operand has 314 places, 501 transitions, 8091 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:00:33,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 537 transitions, 9371 flow [2024-06-14 12:00:35,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 537 transitions, 9126 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:35,406 INFO L231 Difference]: Finished difference. Result has 317 places, 504 transitions, 8322 flow [2024-06-14 12:00:35,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8322, PETRI_PLACES=317, PETRI_TRANSITIONS=504} [2024-06-14 12:00:35,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-14 12:00:35,407 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 504 transitions, 8322 flow [2024-06-14 12:00:35,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:35,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:35,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:35,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:00:35,407 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:35,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1878838793, now seen corresponding path program 13 times [2024-06-14 12:00:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260253993] [2024-06-14 12:00:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:36,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:36,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260253993] [2024-06-14 12:00:36,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260253993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:36,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:36,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:36,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477815451] [2024-06-14 12:00:36,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:37,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:37,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 504 transitions, 8322 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:37,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:37,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:37,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:38,791 INFO L124 PetriNetUnfolderBase]: 4347/6682 cut-off events. [2024-06-14 12:00:38,791 INFO L125 PetriNetUnfolderBase]: For 1041842/1041882 co-relation queries the response was YES. [2024-06-14 12:00:38,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72278 conditions, 6682 events. 4347/6682 cut-off events. For 1041842/1041882 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 37803 event pairs, 1046 based on Foata normal form. 13/6653 useless extension candidates. Maximal degree in co-relation 72133. Up to 5854 conditions per place. [2024-06-14 12:00:38,900 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 391 selfloop transitions, 124 changer transitions 0/537 dead transitions. [2024-06-14 12:00:38,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 537 transitions, 9480 flow [2024-06-14 12:00:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:00:38,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 12:00:38,902 INFO L175 Difference]: Start difference. First operand has 317 places, 504 transitions, 8322 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:00:38,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 537 transitions, 9480 flow [2024-06-14 12:00:40,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 537 transitions, 9062 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:40,713 INFO L231 Difference]: Finished difference. Result has 319 places, 504 transitions, 8172 flow [2024-06-14 12:00:40,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7904, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8172, PETRI_PLACES=319, PETRI_TRANSITIONS=504} [2024-06-14 12:00:40,714 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-14 12:00:40,714 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 504 transitions, 8172 flow [2024-06-14 12:00:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:40,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:40,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:40,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:00:40,715 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:40,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1316286353, now seen corresponding path program 14 times [2024-06-14 12:00:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:40,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259017982] [2024-06-14 12:00:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259017982] [2024-06-14 12:00:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259017982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:42,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:42,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976427633] [2024-06-14 12:00:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:42,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:42,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:42,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:42,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:42,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 504 transitions, 8172 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:42,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:42,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:42,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:44,214 INFO L124 PetriNetUnfolderBase]: 4349/6696 cut-off events. [2024-06-14 12:00:44,215 INFO L125 PetriNetUnfolderBase]: For 960595/960627 co-relation queries the response was YES. [2024-06-14 12:00:44,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70669 conditions, 6696 events. 4349/6696 cut-off events. For 960595/960627 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 37672 event pairs, 795 based on Foata normal form. 21/6717 useless extension candidates. Maximal degree in co-relation 70523. Up to 5737 conditions per place. [2024-06-14 12:00:44,328 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 384 selfloop transitions, 132 changer transitions 0/538 dead transitions. [2024-06-14 12:00:44,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 538 transitions, 9434 flow [2024-06-14 12:00:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:00:44,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:00:44,330 INFO L175 Difference]: Start difference. First operand has 319 places, 504 transitions, 8172 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:00:44,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 538 transitions, 9434 flow [2024-06-14 12:00:46,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 538 transitions, 9144 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 12:00:46,017 INFO L231 Difference]: Finished difference. Result has 319 places, 506 transitions, 8262 flow [2024-06-14 12:00:46,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8262, PETRI_PLACES=319, PETRI_TRANSITIONS=506} [2024-06-14 12:00:46,018 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-14 12:00:46,018 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 506 transitions, 8262 flow [2024-06-14 12:00:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:46,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:46,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:00:46,019 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:46,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash 833711013, now seen corresponding path program 15 times [2024-06-14 12:00:46,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:46,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747398215] [2024-06-14 12:00:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:46,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:47,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:47,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747398215] [2024-06-14 12:00:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747398215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:47,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:47,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222564460] [2024-06-14 12:00:47,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:47,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:47,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:47,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:47,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 506 transitions, 8262 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:47,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:47,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:47,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:49,679 INFO L124 PetriNetUnfolderBase]: 4531/6951 cut-off events. [2024-06-14 12:00:49,679 INFO L125 PetriNetUnfolderBase]: For 980302/980334 co-relation queries the response was YES. [2024-06-14 12:00:49,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73522 conditions, 6951 events. 4531/6951 cut-off events. For 980302/980334 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 39130 event pairs, 837 based on Foata normal form. 21/6957 useless extension candidates. Maximal degree in co-relation 73376. Up to 6099 conditions per place. [2024-06-14 12:00:49,799 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 431 selfloop transitions, 127 changer transitions 0/580 dead transitions. [2024-06-14 12:00:49,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 580 transitions, 10646 flow [2024-06-14 12:00:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 12:00:49,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 12:00:49,800 INFO L175 Difference]: Start difference. First operand has 319 places, 506 transitions, 8262 flow. Second operand 10 states and 184 transitions. [2024-06-14 12:00:49,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 580 transitions, 10646 flow [2024-06-14 12:00:51,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 580 transitions, 10221 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:51,436 INFO L231 Difference]: Finished difference. Result has 325 places, 543 transitions, 9089 flow [2024-06-14 12:00:51,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9089, PETRI_PLACES=325, PETRI_TRANSITIONS=543} [2024-06-14 12:00:51,436 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-14 12:00:51,436 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 543 transitions, 9089 flow [2024-06-14 12:00:51,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:51,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:51,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:51,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:00:51,437 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:51,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:51,437 INFO L85 PathProgramCache]: Analyzing trace with hash 839221263, now seen corresponding path program 16 times [2024-06-14 12:00:51,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:51,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831725588] [2024-06-14 12:00:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:52,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:52,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831725588] [2024-06-14 12:00:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831725588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:52,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:52,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:52,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064080717] [2024-06-14 12:00:52,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:52,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:52,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:52,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:00:53,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 543 transitions, 9089 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:53,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:53,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:00:53,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:54,659 INFO L124 PetriNetUnfolderBase]: 4525/6948 cut-off events. [2024-06-14 12:00:54,659 INFO L125 PetriNetUnfolderBase]: For 968411/968448 co-relation queries the response was YES. [2024-06-14 12:00:54,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73216 conditions, 6948 events. 4525/6948 cut-off events. For 968411/968448 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39227 event pairs, 780 based on Foata normal form. 21/6957 useless extension candidates. Maximal degree in co-relation 73066. Up to 5931 conditions per place. [2024-06-14 12:00:54,765 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 383 selfloop transitions, 170 changer transitions 0/575 dead transitions. [2024-06-14 12:00:54,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 575 transitions, 10323 flow [2024-06-14 12:00:54,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:00:54,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:00:54,767 INFO L175 Difference]: Start difference. First operand has 325 places, 543 transitions, 9089 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:00:54,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 575 transitions, 10323 flow [2024-06-14 12:00:56,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 575 transitions, 10080 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:56,394 INFO L231 Difference]: Finished difference. Result has 330 places, 543 transitions, 9199 flow [2024-06-14 12:00:56,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9199, PETRI_PLACES=330, PETRI_TRANSITIONS=543} [2024-06-14 12:00:56,394 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-14 12:00:56,395 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 543 transitions, 9199 flow [2024-06-14 12:00:56,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:56,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:56,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:56,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:00:56,395 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:56,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1322008364, now seen corresponding path program 2 times [2024-06-14 12:00:56,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:56,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375388365] [2024-06-14 12:00:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:57,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375388365] [2024-06-14 12:00:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375388365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:57,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:57,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:00:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812602671] [2024-06-14 12:00:57,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:57,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:00:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:00:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:00:57,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:00:57,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 543 transitions, 9199 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:00:57,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:57,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:00:57,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:59,662 INFO L124 PetriNetUnfolderBase]: 4924/7391 cut-off events. [2024-06-14 12:00:59,662 INFO L125 PetriNetUnfolderBase]: For 985658/985670 co-relation queries the response was YES. [2024-06-14 12:00:59,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75281 conditions, 7391 events. 4924/7391 cut-off events. For 985658/985670 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40071 event pairs, 844 based on Foata normal form. 18/7409 useless extension candidates. Maximal degree in co-relation 75129. Up to 5848 conditions per place. [2024-06-14 12:00:59,766 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 330 selfloop transitions, 247 changer transitions 0/596 dead transitions. [2024-06-14 12:00:59,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 596 transitions, 10694 flow [2024-06-14 12:00:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:00:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:00:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:00:59,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-14 12:00:59,768 INFO L175 Difference]: Start difference. First operand has 330 places, 543 transitions, 9199 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:00:59,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 596 transitions, 10694 flow [2024-06-14 12:01:01,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 596 transitions, 10301 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:01,404 INFO L231 Difference]: Finished difference. Result has 334 places, 557 transitions, 9541 flow [2024-06-14 12:01:01,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8806, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9541, PETRI_PLACES=334, PETRI_TRANSITIONS=557} [2024-06-14 12:01:01,405 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 12:01:01,405 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 557 transitions, 9541 flow [2024-06-14 12:01:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:01,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:01,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:01,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:01:01,406 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:01,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1941034820, now seen corresponding path program 4 times [2024-06-14 12:01:01,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:01,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148842528] [2024-06-14 12:01:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:01,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:02,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:02,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148842528] [2024-06-14 12:01:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148842528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:02,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:02,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655869079] [2024-06-14 12:01:02,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:02,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:02,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:02,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:02,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 557 transitions, 9541 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:02,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:02,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:02,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:04,218 INFO L124 PetriNetUnfolderBase]: 4792/7250 cut-off events. [2024-06-14 12:01:04,218 INFO L125 PetriNetUnfolderBase]: For 996207/996247 co-relation queries the response was YES. [2024-06-14 12:01:04,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74837 conditions, 7250 events. 4792/7250 cut-off events. For 996207/996247 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40054 event pairs, 1320 based on Foata normal form. 14/7229 useless extension candidates. Maximal degree in co-relation 74683. Up to 6638 conditions per place. [2024-06-14 12:01:04,329 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 436 selfloop transitions, 93 changer transitions 0/584 dead transitions. [2024-06-14 12:01:04,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 584 transitions, 10915 flow [2024-06-14 12:01:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:01:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:01:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:01:04,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-14 12:01:04,330 INFO L175 Difference]: Start difference. First operand has 334 places, 557 transitions, 9541 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:01:04,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 584 transitions, 10915 flow [2024-06-14 12:01:05,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 584 transitions, 10316 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-14 12:01:05,789 INFO L231 Difference]: Finished difference. Result has 332 places, 562 transitions, 9253 flow [2024-06-14 12:01:05,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9253, PETRI_PLACES=332, PETRI_TRANSITIONS=562} [2024-06-14 12:01:05,790 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-14 12:01:05,790 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 562 transitions, 9253 flow [2024-06-14 12:01:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:05,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:05,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:01:05,790 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:05,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2019170042, now seen corresponding path program 5 times [2024-06-14 12:01:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:05,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563855112] [2024-06-14 12:01:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:05,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563855112] [2024-06-14 12:01:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563855112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:06,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451747885] [2024-06-14 12:01:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:06,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:06,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:06,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:06,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 562 transitions, 9253 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:06,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:06,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:06,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:08,663 INFO L124 PetriNetUnfolderBase]: 4801/7253 cut-off events. [2024-06-14 12:01:08,663 INFO L125 PetriNetUnfolderBase]: For 984622/984659 co-relation queries the response was YES. [2024-06-14 12:01:08,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74244 conditions, 7253 events. 4801/7253 cut-off events. For 984622/984659 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39848 event pairs, 974 based on Foata normal form. 14/7232 useless extension candidates. Maximal degree in co-relation 74089. Up to 6646 conditions per place. [2024-06-14 12:01:08,771 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 434 selfloop transitions, 96 changer transitions 0/585 dead transitions. [2024-06-14 12:01:08,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 585 transitions, 10626 flow [2024-06-14 12:01:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:01:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:01:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:01:08,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 12:01:08,772 INFO L175 Difference]: Start difference. First operand has 332 places, 562 transitions, 9253 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:01:08,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 585 transitions, 10626 flow [2024-06-14 12:01:10,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 585 transitions, 10419 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:10,273 INFO L231 Difference]: Finished difference. Result has 333 places, 567 transitions, 9353 flow [2024-06-14 12:01:10,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9061, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9353, PETRI_PLACES=333, PETRI_TRANSITIONS=567} [2024-06-14 12:01:10,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 12:01:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 567 transitions, 9353 flow [2024-06-14 12:01:10,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:10,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:10,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:10,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:01:10,275 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:10,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1193222285, now seen corresponding path program 17 times [2024-06-14 12:01:10,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:10,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656052468] [2024-06-14 12:01:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:10,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:11,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:11,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656052468] [2024-06-14 12:01:11,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656052468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:11,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:11,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:11,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409861584] [2024-06-14 12:01:11,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:11,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:11,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:11,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 567 transitions, 9353 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:11,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:11,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:11,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:13,674 INFO L124 PetriNetUnfolderBase]: 4581/7024 cut-off events. [2024-06-14 12:01:13,675 INFO L125 PetriNetUnfolderBase]: For 973598/973660 co-relation queries the response was YES. [2024-06-14 12:01:13,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74028 conditions, 7024 events. 4581/7024 cut-off events. For 973598/973660 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39577 event pairs, 801 based on Foata normal form. 30/7054 useless extension candidates. Maximal degree in co-relation 73874. Up to 5893 conditions per place. [2024-06-14 12:01:13,781 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 402 selfloop transitions, 170 changer transitions 0/599 dead transitions. [2024-06-14 12:01:13,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 599 transitions, 10725 flow [2024-06-14 12:01:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:01:13,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:01:13,783 INFO L175 Difference]: Start difference. First operand has 333 places, 567 transitions, 9353 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:01:13,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 599 transitions, 10725 flow [2024-06-14 12:01:15,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 599 transitions, 10545 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:15,485 INFO L231 Difference]: Finished difference. Result has 337 places, 569 transitions, 9630 flow [2024-06-14 12:01:15,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9173, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9630, PETRI_PLACES=337, PETRI_TRANSITIONS=569} [2024-06-14 12:01:15,486 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-14 12:01:15,486 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 569 transitions, 9630 flow [2024-06-14 12:01:15,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:15,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:15,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:15,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:01:15,487 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:15,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1193218565, now seen corresponding path program 18 times [2024-06-14 12:01:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:15,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773005901] [2024-06-14 12:01:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:16,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:16,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773005901] [2024-06-14 12:01:16,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773005901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:16,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:16,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:16,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215431566] [2024-06-14 12:01:16,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:16,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:16,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:16,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:17,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:17,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 569 transitions, 9630 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:17,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:17,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:17,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:18,929 INFO L124 PetriNetUnfolderBase]: 4599/7052 cut-off events. [2024-06-14 12:01:18,929 INFO L125 PetriNetUnfolderBase]: For 985082/985144 co-relation queries the response was YES. [2024-06-14 12:01:19,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74966 conditions, 7052 events. 4599/7052 cut-off events. For 985082/985144 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39764 event pairs, 801 based on Foata normal form. 30/7082 useless extension candidates. Maximal degree in co-relation 74812. Up to 5851 conditions per place. [2024-06-14 12:01:19,067 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 403 selfloop transitions, 175 changer transitions 0/605 dead transitions. [2024-06-14 12:01:19,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 605 transitions, 11396 flow [2024-06-14 12:01:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:01:19,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:01:19,069 INFO L175 Difference]: Start difference. First operand has 337 places, 569 transitions, 9630 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:01:19,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 605 transitions, 11396 flow [2024-06-14 12:01:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 605 transitions, 10957 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:20,505 INFO L231 Difference]: Finished difference. Result has 339 places, 573 transitions, 9772 flow [2024-06-14 12:01:20,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9191, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9772, PETRI_PLACES=339, PETRI_TRANSITIONS=573} [2024-06-14 12:01:20,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-14 12:01:20,505 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 573 transitions, 9772 flow [2024-06-14 12:01:20,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:20,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:20,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:20,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:01:20,506 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:20,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1198728815, now seen corresponding path program 19 times [2024-06-14 12:01:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:20,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692169331] [2024-06-14 12:01:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:20,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:21,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:21,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692169331] [2024-06-14 12:01:21,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692169331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:21,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:21,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:21,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937396505] [2024-06-14 12:01:21,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:21,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:21,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:21,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:22,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:22,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 573 transitions, 9772 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:22,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:22,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:22,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:23,891 INFO L124 PetriNetUnfolderBase]: 4616/7079 cut-off events. [2024-06-14 12:01:23,891 INFO L125 PetriNetUnfolderBase]: For 1010738/1010780 co-relation queries the response was YES. [2024-06-14 12:01:23,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75590 conditions, 7079 events. 4616/7079 cut-off events. For 1010738/1010780 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40023 event pairs, 801 based on Foata normal form. 25/7104 useless extension candidates. Maximal degree in co-relation 75435. Up to 5948 conditions per place. [2024-06-14 12:01:24,017 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 410 selfloop transitions, 169 changer transitions 0/606 dead transitions. [2024-06-14 12:01:24,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 606 transitions, 11172 flow [2024-06-14 12:01:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:01:24,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:01:24,018 INFO L175 Difference]: Start difference. First operand has 339 places, 573 transitions, 9772 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:01:24,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 606 transitions, 11172 flow [2024-06-14 12:01:25,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 606 transitions, 10830 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:25,597 INFO L231 Difference]: Finished difference. Result has 343 places, 575 transitions, 9893 flow [2024-06-14 12:01:25,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9452, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9893, PETRI_PLACES=343, PETRI_TRANSITIONS=575} [2024-06-14 12:01:25,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 12:01:25,598 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 575 transitions, 9893 flow [2024-06-14 12:01:25,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:25,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:25,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:01:25,598 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:25,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -326270127, now seen corresponding path program 20 times [2024-06-14 12:01:25,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:25,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438397102] [2024-06-14 12:01:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:27,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438397102] [2024-06-14 12:01:27,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438397102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:27,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:27,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:27,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456254534] [2024-06-14 12:01:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:27,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:27,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:27,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:27,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:27,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:01:27,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 575 transitions, 9893 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:27,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:27,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:01:27,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:29,095 INFO L124 PetriNetUnfolderBase]: 4608/7067 cut-off events. [2024-06-14 12:01:29,096 INFO L125 PetriNetUnfolderBase]: For 1018824/1018886 co-relation queries the response was YES. [2024-06-14 12:01:29,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75665 conditions, 7067 events. 4608/7067 cut-off events. For 1018824/1018886 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39903 event pairs, 769 based on Foata normal form. 30/7097 useless extension candidates. Maximal degree in co-relation 75508. Up to 5936 conditions per place. [2024-06-14 12:01:29,233 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 393 selfloop transitions, 185 changer transitions 0/605 dead transitions. [2024-06-14 12:01:29,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 605 transitions, 11171 flow [2024-06-14 12:01:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:01:29,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:01:29,235 INFO L175 Difference]: Start difference. First operand has 343 places, 575 transitions, 9893 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:01:29,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 605 transitions, 11171 flow [2024-06-14 12:01:31,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 605 transitions, 10674 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:31,089 INFO L231 Difference]: Finished difference. Result has 345 places, 575 transitions, 9773 flow [2024-06-14 12:01:31,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9773, PETRI_PLACES=345, PETRI_TRANSITIONS=575} [2024-06-14 12:01:31,089 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-14 12:01:31,090 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 575 transitions, 9773 flow [2024-06-14 12:01:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:31,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:31,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:31,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:01:31,090 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:31,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1198944296, now seen corresponding path program 3 times [2024-06-14 12:01:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:31,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684851333] [2024-06-14 12:01:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:32,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:32,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684851333] [2024-06-14 12:01:32,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684851333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:32,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:32,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:32,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737125925] [2024-06-14 12:01:32,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:32,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:32,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:32,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:32,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 575 transitions, 9773 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:32,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:32,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:32,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:34,523 INFO L124 PetriNetUnfolderBase]: 4982/7483 cut-off events. [2024-06-14 12:01:34,523 INFO L125 PetriNetUnfolderBase]: For 1066135/1066152 co-relation queries the response was YES. [2024-06-14 12:01:34,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77891 conditions, 7483 events. 4982/7483 cut-off events. For 1066135/1066152 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40930 event pairs, 1322 based on Foata normal form. 10/7474 useless extension candidates. Maximal degree in co-relation 77733. Up to 7037 conditions per place. [2024-06-14 12:01:34,659 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 524 selfloop transitions, 66 changer transitions 0/613 dead transitions. [2024-06-14 12:01:34,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 613 transitions, 11184 flow [2024-06-14 12:01:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 12:01:34,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-14 12:01:34,660 INFO L175 Difference]: Start difference. First operand has 345 places, 575 transitions, 9773 flow. Second operand 10 states and 172 transitions. [2024-06-14 12:01:34,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 613 transitions, 11184 flow [2024-06-14 12:01:36,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 613 transitions, 10795 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:01:36,627 INFO L231 Difference]: Finished difference. Result has 348 places, 580 transitions, 9625 flow [2024-06-14 12:01:36,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9384, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9625, PETRI_PLACES=348, PETRI_TRANSITIONS=580} [2024-06-14 12:01:36,628 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 303 predicate places. [2024-06-14 12:01:36,628 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 580 transitions, 9625 flow [2024-06-14 12:01:36,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:36,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:36,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:36,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:01:36,629 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:36,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:36,629 INFO L85 PathProgramCache]: Analyzing trace with hash -326054646, now seen corresponding path program 4 times [2024-06-14 12:01:36,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:36,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70448519] [2024-06-14 12:01:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:36,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:38,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70448519] [2024-06-14 12:01:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70448519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:38,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:38,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236216429] [2024-06-14 12:01:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:38,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:38,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 580 transitions, 9625 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:38,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:38,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:38,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:40,138 INFO L124 PetriNetUnfolderBase]: 4971/7466 cut-off events. [2024-06-14 12:01:40,138 INFO L125 PetriNetUnfolderBase]: For 1084988/1085005 co-relation queries the response was YES. [2024-06-14 12:01:40,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77615 conditions, 7466 events. 4971/7466 cut-off events. For 1084988/1085005 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40795 event pairs, 1322 based on Foata normal form. 10/7457 useless extension candidates. Maximal degree in co-relation 77455. Up to 7020 conditions per place. [2024-06-14 12:01:40,279 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 525 selfloop transitions, 70 changer transitions 0/618 dead transitions. [2024-06-14 12:01:40,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 618 transitions, 11059 flow [2024-06-14 12:01:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:01:40,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2024-06-14 12:01:40,281 INFO L175 Difference]: Start difference. First operand has 348 places, 580 transitions, 9625 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:01:40,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 618 transitions, 11059 flow [2024-06-14 12:01:42,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 618 transitions, 10863 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:42,369 INFO L231 Difference]: Finished difference. Result has 352 places, 585 transitions, 9689 flow [2024-06-14 12:01:42,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9433, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9689, PETRI_PLACES=352, PETRI_TRANSITIONS=585} [2024-06-14 12:01:42,369 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-14 12:01:42,369 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 585 transitions, 9689 flow [2024-06-14 12:01:42,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:42,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:42,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:42,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:01:42,370 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:42,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash -221151046, now seen corresponding path program 5 times [2024-06-14 12:01:42,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:42,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671578328] [2024-06-14 12:01:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:42,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:43,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:43,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671578328] [2024-06-14 12:01:43,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671578328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:43,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:43,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312520967] [2024-06-14 12:01:43,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:43,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:43,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:43,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:43,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 585 transitions, 9689 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:43,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:43,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:43,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:45,794 INFO L124 PetriNetUnfolderBase]: 4993/7498 cut-off events. [2024-06-14 12:01:45,795 INFO L125 PetriNetUnfolderBase]: For 1111325/1111342 co-relation queries the response was YES. [2024-06-14 12:01:45,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78334 conditions, 7498 events. 4993/7498 cut-off events. For 1111325/1111342 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40967 event pairs, 1332 based on Foata normal form. 10/7489 useless extension candidates. Maximal degree in co-relation 78172. Up to 7048 conditions per place. [2024-06-14 12:01:45,929 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 520 selfloop transitions, 85 changer transitions 0/628 dead transitions. [2024-06-14 12:01:45,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 628 transitions, 11218 flow [2024-06-14 12:01:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 12:01:45,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-06-14 12:01:45,930 INFO L175 Difference]: Start difference. First operand has 352 places, 585 transitions, 9689 flow. Second operand 10 states and 169 transitions. [2024-06-14 12:01:45,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 628 transitions, 11218 flow [2024-06-14 12:01:47,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 628 transitions, 11002 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:47,872 INFO L231 Difference]: Finished difference. Result has 356 places, 598 transitions, 9887 flow [2024-06-14 12:01:47,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9487, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9887, PETRI_PLACES=356, PETRI_TRANSITIONS=598} [2024-06-14 12:01:47,873 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-14 12:01:47,873 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 598 transitions, 9887 flow [2024-06-14 12:01:47,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:47,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:47,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:47,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:01:47,873 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:47,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:47,874 INFO L85 PathProgramCache]: Analyzing trace with hash -221141746, now seen corresponding path program 6 times [2024-06-14 12:01:47,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:47,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047989492] [2024-06-14 12:01:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:47,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:49,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:49,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047989492] [2024-06-14 12:01:49,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047989492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:49,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:49,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773474261] [2024-06-14 12:01:49,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:49,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:49,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:49,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 598 transitions, 9887 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:49,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:49,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:49,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:51,132 INFO L124 PetriNetUnfolderBase]: 4994/7500 cut-off events. [2024-06-14 12:01:51,132 INFO L125 PetriNetUnfolderBase]: For 1103945/1103961 co-relation queries the response was YES. [2024-06-14 12:01:51,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78543 conditions, 7500 events. 4994/7500 cut-off events. For 1103945/1103961 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40775 event pairs, 784 based on Foata normal form. 18/7518 useless extension candidates. Maximal degree in co-relation 78379. Up to 5290 conditions per place. [2024-06-14 12:01:51,257 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 291 selfloop transitions, 343 changer transitions 0/657 dead transitions. [2024-06-14 12:01:51,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 657 transitions, 11814 flow [2024-06-14 12:01:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 12:01:51,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 12:01:51,258 INFO L175 Difference]: Start difference. First operand has 356 places, 598 transitions, 9887 flow. Second operand 10 states and 184 transitions. [2024-06-14 12:01:51,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 657 transitions, 11814 flow [2024-06-14 12:01:53,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 657 transitions, 11625 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:53,087 INFO L231 Difference]: Finished difference. Result has 362 places, 620 transitions, 10703 flow [2024-06-14 12:01:53,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9704, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10703, PETRI_PLACES=362, PETRI_TRANSITIONS=620} [2024-06-14 12:01:53,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-14 12:01:53,088 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 620 transitions, 10703 flow [2024-06-14 12:01:53,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:53,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:53,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:53,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:01:53,088 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:53,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1690998198, now seen corresponding path program 7 times [2024-06-14 12:01:53,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:53,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590724903] [2024-06-14 12:01:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:53,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590724903] [2024-06-14 12:01:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590724903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:54,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:54,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:01:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937164010] [2024-06-14 12:01:54,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:54,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:01:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:01:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:01:54,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:54,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 620 transitions, 10703 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:54,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:54,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:56,574 INFO L124 PetriNetUnfolderBase]: 4993/7497 cut-off events. [2024-06-14 12:01:56,574 INFO L125 PetriNetUnfolderBase]: For 1161502/1161519 co-relation queries the response was YES. [2024-06-14 12:01:56,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80709 conditions, 7497 events. 4993/7497 cut-off events. For 1161502/1161519 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40956 event pairs, 1322 based on Foata normal form. 10/7488 useless extension candidates. Maximal degree in co-relation 80543. Up to 7047 conditions per place. [2024-06-14 12:01:56,707 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 548 selfloop transitions, 81 changer transitions 0/652 dead transitions. [2024-06-14 12:01:56,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 652 transitions, 12151 flow [2024-06-14 12:01:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:01:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:01:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 12:01:56,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 12:01:56,708 INFO L175 Difference]: Start difference. First operand has 362 places, 620 transitions, 10703 flow. Second operand 10 states and 170 transitions. [2024-06-14 12:01:56,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 652 transitions, 12151 flow [2024-06-14 12:01:58,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 652 transitions, 11849 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:01:58,951 INFO L231 Difference]: Finished difference. Result has 368 places, 622 transitions, 10647 flow [2024-06-14 12:01:58,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10403, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10647, PETRI_PLACES=368, PETRI_TRANSITIONS=622} [2024-06-14 12:01:58,952 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-14 12:01:58,952 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 622 transitions, 10647 flow [2024-06-14 12:01:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-14 12:01:58,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:58,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:01:58,953 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:58,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash -751151154, now seen corresponding path program 6 times [2024-06-14 12:01:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:58,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32906486] [2024-06-14 12:01:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:58,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:59,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32906486] [2024-06-14 12:01:59,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32906486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:59,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:59,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:59,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261749452] [2024-06-14 12:01:59,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:59,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:59,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:59,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:01:59,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 622 transitions, 10647 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:59,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:59,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:01:59,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:01,963 INFO L124 PetriNetUnfolderBase]: 4828/7304 cut-off events. [2024-06-14 12:02:01,963 INFO L125 PetriNetUnfolderBase]: For 1132765/1132806 co-relation queries the response was YES. [2024-06-14 12:02:02,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78193 conditions, 7304 events. 4828/7304 cut-off events. For 1132765/1132806 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40328 event pairs, 960 based on Foata normal form. 18/7287 useless extension candidates. Maximal degree in co-relation 78025. Up to 6681 conditions per place. [2024-06-14 12:02:02,105 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 480 selfloop transitions, 94 changer transitions 0/633 dead transitions. [2024-06-14 12:02:02,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 633 transitions, 11836 flow [2024-06-14 12:02:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:02:02,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-14 12:02:02,106 INFO L175 Difference]: Start difference. First operand has 368 places, 622 transitions, 10647 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:02:02,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 633 transitions, 11836 flow [2024-06-14 12:02:04,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 633 transitions, 11560 flow, removed 54 selfloop flow, removed 10 redundant places. [2024-06-14 12:02:04,469 INFO L231 Difference]: Finished difference. Result has 365 places, 622 transitions, 10567 flow [2024-06-14 12:02:04,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10371, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10567, PETRI_PLACES=365, PETRI_TRANSITIONS=622} [2024-06-14 12:02:04,470 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-14 12:02:04,470 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 622 transitions, 10567 flow [2024-06-14 12:02:04,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:04,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:04,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:02:04,471 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:04,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1605862728, now seen corresponding path program 2 times [2024-06-14 12:02:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:04,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307291158] [2024-06-14 12:02:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:05,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:05,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307291158] [2024-06-14 12:02:05,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307291158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:05,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:05,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:05,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145614096] [2024-06-14 12:02:05,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:05,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:05,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:05,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:02:05,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 622 transitions, 10567 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:05,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:05,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:02:05,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:07,349 INFO L124 PetriNetUnfolderBase]: 4834/7315 cut-off events. [2024-06-14 12:02:07,349 INFO L125 PetriNetUnfolderBase]: For 1153899/1153944 co-relation queries the response was YES. [2024-06-14 12:02:07,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78354 conditions, 7315 events. 4834/7315 cut-off events. For 1153899/1153944 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40493 event pairs, 1326 based on Foata normal form. 17/7297 useless extension candidates. Maximal degree in co-relation 78188. Up to 6840 conditions per place. [2024-06-14 12:02:07,486 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 538 selfloop transitions, 38 changer transitions 0/635 dead transitions. [2024-06-14 12:02:07,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 635 transitions, 11957 flow [2024-06-14 12:02:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:02:07,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-14 12:02:07,487 INFO L175 Difference]: Start difference. First operand has 365 places, 622 transitions, 10567 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:02:07,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 635 transitions, 11957 flow [2024-06-14 12:02:09,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 635 transitions, 11645 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:09,529 INFO L231 Difference]: Finished difference. Result has 365 places, 625 transitions, 10383 flow [2024-06-14 12:02:09,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10255, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10383, PETRI_PLACES=365, PETRI_TRANSITIONS=625} [2024-06-14 12:02:09,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-14 12:02:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 625 transitions, 10383 flow [2024-06-14 12:02:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:09,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:09,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:02:09,531 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:09,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1605387498, now seen corresponding path program 3 times [2024-06-14 12:02:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:09,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380398964] [2024-06-14 12:02:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:10,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:10,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380398964] [2024-06-14 12:02:10,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380398964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:10,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:10,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:10,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035685721] [2024-06-14 12:02:10,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:10,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:10,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:10,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:10,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:02:10,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 625 transitions, 10383 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:10,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:10,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:02:10,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:12,471 INFO L124 PetriNetUnfolderBase]: 4831/7311 cut-off events. [2024-06-14 12:02:12,471 INFO L125 PetriNetUnfolderBase]: For 1170468/1170513 co-relation queries the response was YES. [2024-06-14 12:02:12,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78353 conditions, 7311 events. 4831/7311 cut-off events. For 1170468/1170513 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40425 event pairs, 1326 based on Foata normal form. 17/7293 useless extension candidates. Maximal degree in co-relation 78186. Up to 6837 conditions per place. [2024-06-14 12:02:12,611 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 535 selfloop transitions, 40 changer transitions 0/634 dead transitions. [2024-06-14 12:02:12,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 634 transitions, 11561 flow [2024-06-14 12:02:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:02:12,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 12:02:12,613 INFO L175 Difference]: Start difference. First operand has 365 places, 625 transitions, 10383 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:02:12,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 634 transitions, 11561 flow [2024-06-14 12:02:14,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 634 transitions, 11438 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:14,904 INFO L231 Difference]: Finished difference. Result has 368 places, 625 transitions, 10346 flow [2024-06-14 12:02:14,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10260, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10346, PETRI_PLACES=368, PETRI_TRANSITIONS=625} [2024-06-14 12:02:14,905 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-14 12:02:14,905 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 625 transitions, 10346 flow [2024-06-14 12:02:14,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:14,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:14,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:14,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:02:14,905 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:14,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1841860334, now seen corresponding path program 1 times [2024-06-14 12:02:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:14,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549408770] [2024-06-14 12:02:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:14,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:15,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549408770] [2024-06-14 12:02:15,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549408770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:15,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230850548] [2024-06-14 12:02:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:15,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:15,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:16,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:02:16,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 625 transitions, 10346 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:16,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:16,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:02:16,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:17,867 INFO L124 PetriNetUnfolderBase]: 4914/7420 cut-off events. [2024-06-14 12:02:17,867 INFO L125 PetriNetUnfolderBase]: For 1041850/1041858 co-relation queries the response was YES. [2024-06-14 12:02:17,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76258 conditions, 7420 events. 4914/7420 cut-off events. For 1041850/1041858 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40926 event pairs, 1613 based on Foata normal form. 1/7409 useless extension candidates. Maximal degree in co-relation 76090. Up to 7202 conditions per place. [2024-06-14 12:02:18,011 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 609 selfloop transitions, 25 changer transitions 0/647 dead transitions. [2024-06-14 12:02:18,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 647 transitions, 11962 flow [2024-06-14 12:02:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:02:18,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 12:02:18,012 INFO L175 Difference]: Start difference. First operand has 368 places, 625 transitions, 10346 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:02:18,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 647 transitions, 11962 flow [2024-06-14 12:02:20,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 647 transitions, 11890 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:02:20,097 INFO L231 Difference]: Finished difference. Result has 370 places, 631 transitions, 10460 flow [2024-06-14 12:02:20,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10274, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10460, PETRI_PLACES=370, PETRI_TRANSITIONS=631} [2024-06-14 12:02:20,098 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-14 12:02:20,099 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 631 transitions, 10460 flow [2024-06-14 12:02:20,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:20,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:20,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:20,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:02:20,099 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:20,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1841853824, now seen corresponding path program 2 times [2024-06-14 12:02:20,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:20,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447888283] [2024-06-14 12:02:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:20,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:21,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447888283] [2024-06-14 12:02:21,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447888283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:21,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:21,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6678657] [2024-06-14 12:02:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:21,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:21,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:21,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:02:21,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 631 transitions, 10460 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:21,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:21,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:02:21,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:22,889 INFO L124 PetriNetUnfolderBase]: 4919/7427 cut-off events. [2024-06-14 12:02:22,889 INFO L125 PetriNetUnfolderBase]: For 1065216/1065224 co-relation queries the response was YES. [2024-06-14 12:02:22,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76898 conditions, 7427 events. 4919/7427 cut-off events. For 1065216/1065224 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40988 event pairs, 1613 based on Foata normal form. 1/7416 useless extension candidates. Maximal degree in co-relation 76729. Up to 7208 conditions per place. [2024-06-14 12:02:23,026 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 607 selfloop transitions, 27 changer transitions 0/647 dead transitions. [2024-06-14 12:02:23,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 647 transitions, 12008 flow [2024-06-14 12:02:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:02:23,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37987012987012986 [2024-06-14 12:02:23,027 INFO L175 Difference]: Start difference. First operand has 370 places, 631 transitions, 10460 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:02:23,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 647 transitions, 12008 flow [2024-06-14 12:02:25,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 647 transitions, 11909 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:25,334 INFO L231 Difference]: Finished difference. Result has 374 places, 634 transitions, 10489 flow [2024-06-14 12:02:25,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10373, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10489, PETRI_PLACES=374, PETRI_TRANSITIONS=634} [2024-06-14 12:02:25,335 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-14 12:02:25,335 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 634 transitions, 10489 flow [2024-06-14 12:02:25,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:25,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:25,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:02:25,336 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:25,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1841853576, now seen corresponding path program 1 times [2024-06-14 12:02:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:25,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578868949] [2024-06-14 12:02:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:26,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:26,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578868949] [2024-06-14 12:02:26,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578868949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:26,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:26,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:26,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751994106] [2024-06-14 12:02:26,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:26,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:26,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:26,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:26,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 634 transitions, 10489 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:26,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:26,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:26,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:28,064 INFO L124 PetriNetUnfolderBase]: 4658/7154 cut-off events. [2024-06-14 12:02:28,064 INFO L125 PetriNetUnfolderBase]: For 1093811/1093875 co-relation queries the response was YES. [2024-06-14 12:02:28,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75151 conditions, 7154 events. 4658/7154 cut-off events. For 1093811/1093875 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40660 event pairs, 1497 based on Foata normal form. 23/7113 useless extension candidates. Maximal degree in co-relation 74980. Up to 6544 conditions per place. [2024-06-14 12:02:28,185 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 560 selfloop transitions, 26 changer transitions 0/658 dead transitions. [2024-06-14 12:02:28,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 658 transitions, 12001 flow [2024-06-14 12:02:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:02:28,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40584415584415584 [2024-06-14 12:02:28,187 INFO L175 Difference]: Start difference. First operand has 374 places, 634 transitions, 10489 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:02:28,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 658 transitions, 12001 flow [2024-06-14 12:02:30,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 658 transitions, 11919 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:30,358 INFO L231 Difference]: Finished difference. Result has 378 places, 643 transitions, 10610 flow [2024-06-14 12:02:30,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10407, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10610, PETRI_PLACES=378, PETRI_TRANSITIONS=643} [2024-06-14 12:02:30,359 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-14 12:02:30,359 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 643 transitions, 10610 flow [2024-06-14 12:02:30,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:30,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:30,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:30,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:02:30,359 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:30,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash 274438772, now seen corresponding path program 2 times [2024-06-14 12:02:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:30,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326460373] [2024-06-14 12:02:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:30,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:31,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326460373] [2024-06-14 12:02:31,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326460373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:31,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:31,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:31,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586422025] [2024-06-14 12:02:31,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:31,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:31,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:31,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:31,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:31,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 643 transitions, 10610 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:31,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:31,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:31,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:33,237 INFO L124 PetriNetUnfolderBase]: 4668/7170 cut-off events. [2024-06-14 12:02:33,237 INFO L125 PetriNetUnfolderBase]: For 1118034/1118098 co-relation queries the response was YES. [2024-06-14 12:02:33,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76059 conditions, 7170 events. 4668/7170 cut-off events. For 1118034/1118098 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40764 event pairs, 1495 based on Foata normal form. 23/7129 useless extension candidates. Maximal degree in co-relation 75886. Up to 6584 conditions per place. [2024-06-14 12:02:33,367 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 567 selfloop transitions, 17 changer transitions 0/656 dead transitions. [2024-06-14 12:02:33,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 656 transitions, 11870 flow [2024-06-14 12:02:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:02:33,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-14 12:02:33,368 INFO L175 Difference]: Start difference. First operand has 378 places, 643 transitions, 10610 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:02:33,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 656 transitions, 11870 flow [2024-06-14 12:02:35,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 656 transitions, 11808 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 12:02:35,412 INFO L231 Difference]: Finished difference. Result has 383 places, 646 transitions, 10655 flow [2024-06-14 12:02:35,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10550, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10655, PETRI_PLACES=383, PETRI_TRANSITIONS=646} [2024-06-14 12:02:35,412 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 12:02:35,412 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 646 transitions, 10655 flow [2024-06-14 12:02:35,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:35,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:35,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:35,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:02:35,413 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:35,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash -750966456, now seen corresponding path program 3 times [2024-06-14 12:02:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:35,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998122614] [2024-06-14 12:02:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:36,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:36,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998122614] [2024-06-14 12:02:36,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998122614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:36,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:36,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468340735] [2024-06-14 12:02:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:36,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:36,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:02:36,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 646 transitions, 10655 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:36,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:36,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:02:36,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:38,138 INFO L124 PetriNetUnfolderBase]: 4944/7466 cut-off events. [2024-06-14 12:02:38,138 INFO L125 PetriNetUnfolderBase]: For 1132640/1132648 co-relation queries the response was YES. [2024-06-14 12:02:38,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78458 conditions, 7466 events. 4944/7466 cut-off events. For 1132640/1132648 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41246 event pairs, 1611 based on Foata normal form. 1/7455 useless extension candidates. Maximal degree in co-relation 78282. Up to 7271 conditions per place. [2024-06-14 12:02:38,272 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 627 selfloop transitions, 15 changer transitions 0/655 dead transitions. [2024-06-14 12:02:38,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 655 transitions, 11967 flow [2024-06-14 12:02:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:02:38,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3538961038961039 [2024-06-14 12:02:38,274 INFO L175 Difference]: Start difference. First operand has 383 places, 646 transitions, 10655 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:02:38,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 655 transitions, 11967 flow [2024-06-14 12:02:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 655 transitions, 11853 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 12:02:40,652 INFO L231 Difference]: Finished difference. Result has 385 places, 646 transitions, 10577 flow [2024-06-14 12:02:40,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10541, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10577, PETRI_PLACES=385, PETRI_TRANSITIONS=646} [2024-06-14 12:02:40,653 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-14 12:02:40,653 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 646 transitions, 10577 flow [2024-06-14 12:02:40,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:40,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:40,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:02:40,654 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:40,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1605678216, now seen corresponding path program 3 times [2024-06-14 12:02:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:40,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154774941] [2024-06-14 12:02:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:41,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:41,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154774941] [2024-06-14 12:02:41,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154774941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:41,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:41,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:41,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606966918] [2024-06-14 12:02:41,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:41,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:41,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:41,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:41,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 646 transitions, 10577 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:41,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:41,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:41,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:43,430 INFO L124 PetriNetUnfolderBase]: 4659/7158 cut-off events. [2024-06-14 12:02:43,430 INFO L125 PetriNetUnfolderBase]: For 1148500/1148564 co-relation queries the response was YES. [2024-06-14 12:02:43,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76050 conditions, 7158 events. 4659/7158 cut-off events. For 1148500/1148564 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40842 event pairs, 1494 based on Foata normal form. 23/7117 useless extension candidates. Maximal degree in co-relation 75874. Up to 6564 conditions per place. [2024-06-14 12:02:43,549 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 563 selfloop transitions, 22 changer transitions 0/657 dead transitions. [2024-06-14 12:02:43,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 657 transitions, 11783 flow [2024-06-14 12:02:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:02:43,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 12:02:43,551 INFO L175 Difference]: Start difference. First operand has 385 places, 646 transitions, 10577 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:02:43,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 657 transitions, 11783 flow [2024-06-14 12:02:45,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 657 transitions, 11687 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:45,722 INFO L231 Difference]: Finished difference. Result has 385 places, 646 transitions, 10531 flow [2024-06-14 12:02:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10481, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10531, PETRI_PLACES=385, PETRI_TRANSITIONS=646} [2024-06-14 12:02:45,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-14 12:02:45,723 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 646 transitions, 10531 flow [2024-06-14 12:02:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:45,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:45,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:45,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:02:45,723 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:45,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1738482688, now seen corresponding path program 1 times [2024-06-14 12:02:45,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:45,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881485122] [2024-06-14 12:02:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:47,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:47,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881485122] [2024-06-14 12:02:47,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881485122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:47,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:47,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:02:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105987723] [2024-06-14 12:02:47,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:02:47,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:47,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:02:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:02:47,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:47,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 646 transitions, 10531 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:47,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:47,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:47,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:49,061 INFO L124 PetriNetUnfolderBase]: 4787/7315 cut-off events. [2024-06-14 12:02:49,061 INFO L125 PetriNetUnfolderBase]: For 1458952/1458981 co-relation queries the response was YES. [2024-06-14 12:02:49,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83612 conditions, 7315 events. 4787/7315 cut-off events. For 1458952/1458981 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41399 event pairs, 864 based on Foata normal form. 14/7292 useless extension candidates. Maximal degree in co-relation 83435. Up to 6530 conditions per place. [2024-06-14 12:02:49,190 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 569 selfloop transitions, 86 changer transitions 0/691 dead transitions. [2024-06-14 12:02:49,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 691 transitions, 12111 flow [2024-06-14 12:02:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:02:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:02:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-14 12:02:49,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40702479338842973 [2024-06-14 12:02:49,192 INFO L175 Difference]: Start difference. First operand has 385 places, 646 transitions, 10531 flow. Second operand 11 states and 197 transitions. [2024-06-14 12:02:49,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 691 transitions, 12111 flow [2024-06-14 12:02:51,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 691 transitions, 12040 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:51,395 INFO L231 Difference]: Finished difference. Result has 390 places, 648 transitions, 10763 flow [2024-06-14 12:02:51,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10460, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10763, PETRI_PLACES=390, PETRI_TRANSITIONS=648} [2024-06-14 12:02:51,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-14 12:02:51,395 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 648 transitions, 10763 flow [2024-06-14 12:02:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:51,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:51,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:51,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:02:51,396 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:51,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1564798314, now seen corresponding path program 2 times [2024-06-14 12:02:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:51,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890904835] [2024-06-14 12:02:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:52,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890904835] [2024-06-14 12:02:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890904835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:52,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:02:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463371352] [2024-06-14 12:02:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:52,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:02:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:02:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:02:52,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:52,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 648 transitions, 10763 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:52,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:52,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:52,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:54,797 INFO L124 PetriNetUnfolderBase]: 4785/7341 cut-off events. [2024-06-14 12:02:54,797 INFO L125 PetriNetUnfolderBase]: For 1441375/1441398 co-relation queries the response was YES. [2024-06-14 12:02:54,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84364 conditions, 7341 events. 4785/7341 cut-off events. For 1441375/1441398 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41808 event pairs, 1090 based on Foata normal form. 14/7330 useless extension candidates. Maximal degree in co-relation 84186. Up to 6599 conditions per place. [2024-06-14 12:02:54,925 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 575 selfloop transitions, 84 changer transitions 0/695 dead transitions. [2024-06-14 12:02:54,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 695 transitions, 12480 flow [2024-06-14 12:02:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:02:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:02:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-14 12:02:54,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41115702479338845 [2024-06-14 12:02:54,926 INFO L175 Difference]: Start difference. First operand has 390 places, 648 transitions, 10763 flow. Second operand 11 states and 199 transitions. [2024-06-14 12:02:54,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 695 transitions, 12480 flow [2024-06-14 12:02:57,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 695 transitions, 12081 flow, removed 114 selfloop flow, removed 9 redundant places. [2024-06-14 12:02:57,539 INFO L231 Difference]: Finished difference. Result has 392 places, 652 transitions, 10799 flow [2024-06-14 12:02:57,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10482, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10799, PETRI_PLACES=392, PETRI_TRANSITIONS=652} [2024-06-14 12:02:57,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-14 12:02:57,540 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 652 transitions, 10799 flow [2024-06-14 12:02:57,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:57,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:57,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:57,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:02:57,541 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:57,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash -957008662, now seen corresponding path program 3 times [2024-06-14 12:02:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171589837] [2024-06-14 12:02:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:58,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171589837] [2024-06-14 12:02:58,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171589837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:58,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:58,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:02:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453121241] [2024-06-14 12:02:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:58,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:02:58,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:58,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:02:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:02:59,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:02:59,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 652 transitions, 10799 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:59,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:59,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:02:59,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:01,106 INFO L124 PetriNetUnfolderBase]: 4856/7461 cut-off events. [2024-06-14 12:03:01,106 INFO L125 PetriNetUnfolderBase]: For 1565085/1565112 co-relation queries the response was YES. [2024-06-14 12:03:01,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87087 conditions, 7461 events. 4856/7461 cut-off events. For 1565085/1565112 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42870 event pairs, 1026 based on Foata normal form. 8/7427 useless extension candidates. Maximal degree in co-relation 86908. Up to 6461 conditions per place. [2024-06-14 12:03:01,247 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 542 selfloop transitions, 122 changer transitions 0/700 dead transitions. [2024-06-14 12:03:01,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 700 transitions, 12863 flow [2024-06-14 12:03:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-14 12:03:01,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-14 12:03:01,249 INFO L175 Difference]: Start difference. First operand has 392 places, 652 transitions, 10799 flow. Second operand 11 states and 205 transitions. [2024-06-14 12:03:01,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 700 transitions, 12863 flow [2024-06-14 12:03:04,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 700 transitions, 12588 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-14 12:03:04,084 INFO L231 Difference]: Finished difference. Result has 394 places, 656 transitions, 11032 flow [2024-06-14 12:03:04,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11032, PETRI_PLACES=394, PETRI_TRANSITIONS=656} [2024-06-14 12:03:04,085 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-14 12:03:04,085 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 656 transitions, 11032 flow [2024-06-14 12:03:04,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:04,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:04,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:04,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:03:04,085 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:04,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash -176968530, now seen corresponding path program 4 times [2024-06-14 12:03:04,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:04,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092542582] [2024-06-14 12:03:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:05,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092542582] [2024-06-14 12:03:05,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092542582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:05,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:05,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:03:05,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949252481] [2024-06-14 12:03:05,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:05,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:03:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:03:05,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:03:05,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:05,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 656 transitions, 11032 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:05,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:05,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:05,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:07,884 INFO L124 PetriNetUnfolderBase]: 4869/7500 cut-off events. [2024-06-14 12:03:07,884 INFO L125 PetriNetUnfolderBase]: For 1602037/1602064 co-relation queries the response was YES. [2024-06-14 12:03:07,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87490 conditions, 7500 events. 4869/7500 cut-off events. For 1602037/1602064 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43385 event pairs, 1065 based on Foata normal form. 12/7470 useless extension candidates. Maximal degree in co-relation 87310. Up to 6670 conditions per place. [2024-06-14 12:03:08,016 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 544 selfloop transitions, 120 changer transitions 0/700 dead transitions. [2024-06-14 12:03:08,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 700 transitions, 12652 flow [2024-06-14 12:03:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-14 12:03:08,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152892561983471 [2024-06-14 12:03:08,017 INFO L175 Difference]: Start difference. First operand has 394 places, 656 transitions, 11032 flow. Second operand 11 states and 201 transitions. [2024-06-14 12:03:08,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 700 transitions, 12652 flow [2024-06-14 12:03:10,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 700 transitions, 12355 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:10,590 INFO L231 Difference]: Finished difference. Result has 398 places, 658 transitions, 11123 flow [2024-06-14 12:03:10,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10755, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11123, PETRI_PLACES=398, PETRI_TRANSITIONS=658} [2024-06-14 12:03:10,591 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-14 12:03:10,591 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 658 transitions, 11123 flow [2024-06-14 12:03:10,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:10,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:10,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:10,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:03:10,591 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:10,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:10,592 INFO L85 PathProgramCache]: Analyzing trace with hash -924719062, now seen corresponding path program 5 times [2024-06-14 12:03:10,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:10,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084732559] [2024-06-14 12:03:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:10,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:12,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084732559] [2024-06-14 12:03:12,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084732559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:12,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:12,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:03:12,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456526183] [2024-06-14 12:03:12,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:12,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:03:12,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:03:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:03:12,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:12,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 658 transitions, 11123 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:12,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:12,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:12,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:14,386 INFO L124 PetriNetUnfolderBase]: 4861/7484 cut-off events. [2024-06-14 12:03:14,386 INFO L125 PetriNetUnfolderBase]: For 1597550/1597577 co-relation queries the response was YES. [2024-06-14 12:03:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87177 conditions, 7484 events. 4861/7484 cut-off events. For 1597550/1597577 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43202 event pairs, 1044 based on Foata normal form. 8/7450 useless extension candidates. Maximal degree in co-relation 86995. Up to 6587 conditions per place. [2024-06-14 12:03:14,506 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 544 selfloop transitions, 120 changer transitions 0/700 dead transitions. [2024-06-14 12:03:14,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 700 transitions, 12609 flow [2024-06-14 12:03:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-14 12:03:14,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41735537190082644 [2024-06-14 12:03:14,508 INFO L175 Difference]: Start difference. First operand has 398 places, 658 transitions, 11123 flow. Second operand 11 states and 202 transitions. [2024-06-14 12:03:14,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 700 transitions, 12609 flow [2024-06-14 12:03:17,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 700 transitions, 12209 flow, removed 97 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:17,263 INFO L231 Difference]: Finished difference. Result has 401 places, 658 transitions, 10971 flow [2024-06-14 12:03:17,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10971, PETRI_PLACES=401, PETRI_TRANSITIONS=658} [2024-06-14 12:03:17,264 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-14 12:03:17,264 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 658 transitions, 10971 flow [2024-06-14 12:03:17,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:17,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:17,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:17,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:03:17,264 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:17,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash 936111698, now seen corresponding path program 2 times [2024-06-14 12:03:17,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:17,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387045208] [2024-06-14 12:03:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:17,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:18,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387045208] [2024-06-14 12:03:18,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387045208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:18,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:18,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269808764] [2024-06-14 12:03:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:18,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:18,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:18,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:18,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:03:18,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 658 transitions, 10971 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:18,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:18,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:03:18,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:20,277 INFO L124 PetriNetUnfolderBase]: 5029/7633 cut-off events. [2024-06-14 12:03:20,277 INFO L125 PetriNetUnfolderBase]: For 1509095/1509148 co-relation queries the response was YES. [2024-06-14 12:03:20,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85096 conditions, 7633 events. 5029/7633 cut-off events. For 1509095/1509148 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42983 event pairs, 1021 based on Foata normal form. 26/7617 useless extension candidates. Maximal degree in co-relation 84913. Up to 6915 conditions per place. [2024-06-14 12:03:20,402 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 517 selfloop transitions, 120 changer transitions 0/699 dead transitions. [2024-06-14 12:03:20,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 699 transitions, 12857 flow [2024-06-14 12:03:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:03:20,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-14 12:03:20,403 INFO L175 Difference]: Start difference. First operand has 401 places, 658 transitions, 10971 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:03:20,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 699 transitions, 12857 flow [2024-06-14 12:03:23,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 699 transitions, 12575 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 12:03:23,232 INFO L231 Difference]: Finished difference. Result has 401 places, 671 transitions, 11111 flow [2024-06-14 12:03:23,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10689, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11111, PETRI_PLACES=401, PETRI_TRANSITIONS=671} [2024-06-14 12:03:23,232 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-14 12:03:23,232 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 671 transitions, 11111 flow [2024-06-14 12:03:23,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:23,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:23,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:23,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:03:23,233 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:23,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1898637428, now seen corresponding path program 6 times [2024-06-14 12:03:23,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:23,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679542828] [2024-06-14 12:03:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:23,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:24,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:24,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679542828] [2024-06-14 12:03:24,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679542828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:24,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:24,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:03:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48154680] [2024-06-14 12:03:24,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:03:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:03:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:03:24,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:24,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 671 transitions, 11111 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:24,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:24,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:24,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:26,993 INFO L124 PetriNetUnfolderBase]: 4918/7581 cut-off events. [2024-06-14 12:03:26,993 INFO L125 PetriNetUnfolderBase]: For 1566227/1566245 co-relation queries the response was YES. [2024-06-14 12:03:27,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87370 conditions, 7581 events. 4918/7581 cut-off events. For 1566227/1566245 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43903 event pairs, 824 based on Foata normal form. 15/7585 useless extension candidates. Maximal degree in co-relation 87185. Up to 6787 conditions per place. [2024-06-14 12:03:27,137 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 598 selfloop transitions, 84 changer transitions 0/718 dead transitions. [2024-06-14 12:03:27,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 718 transitions, 12770 flow [2024-06-14 12:03:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-14 12:03:27,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132231404958678 [2024-06-14 12:03:27,139 INFO L175 Difference]: Start difference. First operand has 401 places, 671 transitions, 11111 flow. Second operand 11 states and 200 transitions. [2024-06-14 12:03:27,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 718 transitions, 12770 flow [2024-06-14 12:03:30,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 718 transitions, 12608 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:30,684 INFO L231 Difference]: Finished difference. Result has 408 places, 677 transitions, 11296 flow [2024-06-14 12:03:30,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10949, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11296, PETRI_PLACES=408, PETRI_TRANSITIONS=677} [2024-06-14 12:03:30,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-14 12:03:30,685 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 677 transitions, 11296 flow [2024-06-14 12:03:30,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:30,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:30,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:03:30,686 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:30,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash 265108108, now seen corresponding path program 7 times [2024-06-14 12:03:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070458012] [2024-06-14 12:03:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:32,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:32,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070458012] [2024-06-14 12:03:32,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070458012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:32,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:32,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:03:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022089311] [2024-06-14 12:03:32,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:32,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:03:32,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:32,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:03:32,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:03:32,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:32,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 677 transitions, 11296 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:32,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:32,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:32,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:34,531 INFO L124 PetriNetUnfolderBase]: 4985/7718 cut-off events. [2024-06-14 12:03:34,531 INFO L125 PetriNetUnfolderBase]: For 1625669/1625687 co-relation queries the response was YES. [2024-06-14 12:03:34,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89156 conditions, 7718 events. 4985/7718 cut-off events. For 1625669/1625687 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45183 event pairs, 846 based on Foata normal form. 15/7722 useless extension candidates. Maximal degree in co-relation 88970. Up to 6741 conditions per place. [2024-06-14 12:03:34,677 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 569 selfloop transitions, 122 changer transitions 0/727 dead transitions. [2024-06-14 12:03:34,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 727 transitions, 13462 flow [2024-06-14 12:03:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-14 12:03:34,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-14 12:03:34,678 INFO L175 Difference]: Start difference. First operand has 408 places, 677 transitions, 11296 flow. Second operand 11 states and 205 transitions. [2024-06-14 12:03:34,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 727 transitions, 13462 flow [2024-06-14 12:03:38,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 727 transitions, 13185 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-14 12:03:38,265 INFO L231 Difference]: Finished difference. Result has 411 places, 685 transitions, 11595 flow [2024-06-14 12:03:38,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11019, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11595, PETRI_PLACES=411, PETRI_TRANSITIONS=685} [2024-06-14 12:03:38,266 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 366 predicate places. [2024-06-14 12:03:38,266 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 685 transitions, 11595 flow [2024-06-14 12:03:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:38,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:38,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:38,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:03:38,266 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:38,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1983456464, now seen corresponding path program 8 times [2024-06-14 12:03:38,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:38,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248526815] [2024-06-14 12:03:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:38,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:39,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:39,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248526815] [2024-06-14 12:03:39,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248526815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:39,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:39,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:03:39,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522568050] [2024-06-14 12:03:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:39,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:03:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:03:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:03:40,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:40,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 685 transitions, 11595 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:40,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:40,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:40,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:42,350 INFO L124 PetriNetUnfolderBase]: 4973/7700 cut-off events. [2024-06-14 12:03:42,350 INFO L125 PetriNetUnfolderBase]: For 1641805/1641823 co-relation queries the response was YES. [2024-06-14 12:03:42,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88602 conditions, 7700 events. 4973/7700 cut-off events. For 1641805/1641823 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45067 event pairs, 856 based on Foata normal form. 19/7708 useless extension candidates. Maximal degree in co-relation 88414. Up to 6811 conditions per place. [2024-06-14 12:03:42,471 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 569 selfloop transitions, 120 changer transitions 0/725 dead transitions. [2024-06-14 12:03:42,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 725 transitions, 13125 flow [2024-06-14 12:03:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-14 12:03:42,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41735537190082644 [2024-06-14 12:03:42,473 INFO L175 Difference]: Start difference. First operand has 411 places, 685 transitions, 11595 flow. Second operand 11 states and 202 transitions. [2024-06-14 12:03:42,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 725 transitions, 13125 flow [2024-06-14 12:03:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 725 transitions, 12759 flow, removed 124 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:46,071 INFO L231 Difference]: Finished difference. Result has 416 places, 685 transitions, 11485 flow [2024-06-14 12:03:46,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11229, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11485, PETRI_PLACES=416, PETRI_TRANSITIONS=685} [2024-06-14 12:03:46,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-14 12:03:46,071 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 685 transitions, 11485 flow [2024-06-14 12:03:46,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:46,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:46,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:46,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:03:46,072 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:46,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1983336494, now seen corresponding path program 9 times [2024-06-14 12:03:46,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:46,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753145048] [2024-06-14 12:03:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:47,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753145048] [2024-06-14 12:03:47,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753145048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:47,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:47,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:03:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50632581] [2024-06-14 12:03:47,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:03:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:03:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:03:47,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:03:47,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 685 transitions, 11485 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:47,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:47,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:03:47,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:49,846 INFO L124 PetriNetUnfolderBase]: 5017/7776 cut-off events. [2024-06-14 12:03:49,846 INFO L125 PetriNetUnfolderBase]: For 1669795/1669813 co-relation queries the response was YES. [2024-06-14 12:03:49,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89641 conditions, 7776 events. 5017/7776 cut-off events. For 1669795/1669813 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 45602 event pairs, 852 based on Foata normal form. 15/7780 useless extension candidates. Maximal degree in co-relation 89451. Up to 6675 conditions per place. [2024-06-14 12:03:50,002 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 565 selfloop transitions, 128 changer transitions 0/729 dead transitions. [2024-06-14 12:03:50,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 729 transitions, 13163 flow [2024-06-14 12:03:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-14 12:03:50,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214876033057851 [2024-06-14 12:03:50,004 INFO L175 Difference]: Start difference. First operand has 416 places, 685 transitions, 11485 flow. Second operand 11 states and 204 transitions. [2024-06-14 12:03:50,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 729 transitions, 13163 flow [2024-06-14 12:03:53,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 729 transitions, 12959 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:53,315 INFO L231 Difference]: Finished difference. Result has 419 places, 689 transitions, 11703 flow [2024-06-14 12:03:53,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11281, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11703, PETRI_PLACES=419, PETRI_TRANSITIONS=689} [2024-06-14 12:03:53,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 374 predicate places. [2024-06-14 12:03:53,316 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 689 transitions, 11703 flow [2024-06-14 12:03:53,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:53,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:53,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:53,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:03:53,316 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:53,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1620722701, now seen corresponding path program 1 times [2024-06-14 12:03:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:53,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946268934] [2024-06-14 12:03:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:54,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:54,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946268934] [2024-06-14 12:03:54,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946268934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:54,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:54,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:54,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899316035] [2024-06-14 12:03:54,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:54,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:54,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:54,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:03:54,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 689 transitions, 11703 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:54,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:54,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:03:54,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:56,225 INFO L124 PetriNetUnfolderBase]: 5242/7984 cut-off events. [2024-06-14 12:03:56,225 INFO L125 PetriNetUnfolderBase]: For 1681944/1681985 co-relation queries the response was YES. [2024-06-14 12:03:56,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89892 conditions, 7984 events. 5242/7984 cut-off events. For 1681944/1681985 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 45855 event pairs, 1387 based on Foata normal form. 13/7943 useless extension candidates. Maximal degree in co-relation 89701. Up to 7489 conditions per place. [2024-06-14 12:03:56,376 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 618 selfloop transitions, 37 changer transitions 0/717 dead transitions. [2024-06-14 12:03:56,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 717 transitions, 13431 flow [2024-06-14 12:03:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:03:56,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-14 12:03:56,377 INFO L175 Difference]: Start difference. First operand has 419 places, 689 transitions, 11703 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:03:56,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 717 transitions, 13431 flow [2024-06-14 12:04:00,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 717 transitions, 13025 flow, removed 65 selfloop flow, removed 10 redundant places. [2024-06-14 12:04:00,183 INFO L231 Difference]: Finished difference. Result has 417 places, 695 transitions, 11528 flow [2024-06-14 12:04:00,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11297, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11528, PETRI_PLACES=417, PETRI_TRANSITIONS=695} [2024-06-14 12:04:00,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-14 12:04:00,184 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 695 transitions, 11528 flow [2024-06-14 12:04:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:00,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:00,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:00,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:04:00,184 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:00,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -632243300, now seen corresponding path program 10 times [2024-06-14 12:04:00,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:00,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339937415] [2024-06-14 12:04:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:00,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339937415] [2024-06-14 12:04:01,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339937415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:01,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:01,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408247292] [2024-06-14 12:04:01,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:01,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:01,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:01,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 695 transitions, 11528 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:01,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:01,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:01,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:04,435 INFO L124 PetriNetUnfolderBase]: 5057/7845 cut-off events. [2024-06-14 12:04:04,435 INFO L125 PetriNetUnfolderBase]: For 1758429/1758446 co-relation queries the response was YES. [2024-06-14 12:04:04,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91194 conditions, 7845 events. 5057/7845 cut-off events. For 1758429/1758446 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 46234 event pairs, 850 based on Foata normal form. 20/7858 useless extension candidates. Maximal degree in co-relation 91002. Up to 6495 conditions per place. [2024-06-14 12:04:04,596 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 527 selfloop transitions, 173 changer transitions 0/738 dead transitions. [2024-06-14 12:04:04,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 738 transitions, 13232 flow [2024-06-14 12:04:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-14 12:04:04,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-06-14 12:04:04,597 INFO L175 Difference]: Start difference. First operand has 417 places, 695 transitions, 11528 flow. Second operand 11 states and 208 transitions. [2024-06-14 12:04:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 738 transitions, 13232 flow [2024-06-14 12:04:07,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 738 transitions, 13110 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:04:07,970 INFO L231 Difference]: Finished difference. Result has 424 places, 697 transitions, 11906 flow [2024-06-14 12:04:07,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11406, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11906, PETRI_PLACES=424, PETRI_TRANSITIONS=697} [2024-06-14 12:04:07,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-14 12:04:07,970 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 697 transitions, 11906 flow [2024-06-14 12:04:07,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:07,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:07,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:07,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:04:07,971 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:07,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1515889870, now seen corresponding path program 11 times [2024-06-14 12:04:07,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:07,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500788596] [2024-06-14 12:04:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:07,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:09,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:09,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500788596] [2024-06-14 12:04:09,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500788596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:09,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:09,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79551843] [2024-06-14 12:04:09,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:09,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:09,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:09,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:09,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 697 transitions, 11906 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:09,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:09,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:09,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:11,892 INFO L124 PetriNetUnfolderBase]: 5163/8021 cut-off events. [2024-06-14 12:04:11,893 INFO L125 PetriNetUnfolderBase]: For 1909896/1909913 co-relation queries the response was YES. [2024-06-14 12:04:11,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94416 conditions, 8021 events. 5163/8021 cut-off events. For 1909896/1909913 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 47568 event pairs, 824 based on Foata normal form. 40/8054 useless extension candidates. Maximal degree in co-relation 94222. Up to 6546 conditions per place. [2024-06-14 12:04:12,047 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 514 selfloop transitions, 192 changer transitions 0/744 dead transitions. [2024-06-14 12:04:12,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 744 transitions, 13666 flow [2024-06-14 12:04:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-14 12:04:12,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-14 12:04:12,049 INFO L175 Difference]: Start difference. First operand has 424 places, 697 transitions, 11906 flow. Second operand 11 states and 210 transitions. [2024-06-14 12:04:12,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 744 transitions, 13666 flow [2024-06-14 12:04:16,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 744 transitions, 13186 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-14 12:04:16,160 INFO L231 Difference]: Finished difference. Result has 426 places, 699 transitions, 11970 flow [2024-06-14 12:04:16,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11426, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11970, PETRI_PLACES=426, PETRI_TRANSITIONS=699} [2024-06-14 12:04:16,161 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-14 12:04:16,161 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 699 transitions, 11970 flow [2024-06-14 12:04:16,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:16,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:16,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:16,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:04:16,161 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:16,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1522318960, now seen corresponding path program 12 times [2024-06-14 12:04:16,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:16,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831798621] [2024-06-14 12:04:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:16,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:17,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:17,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831798621] [2024-06-14 12:04:17,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831798621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:17,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:17,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:17,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736821713] [2024-06-14 12:04:17,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:17,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:17,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:17,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:17,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 699 transitions, 11970 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:17,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:17,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:20,174 INFO L124 PetriNetUnfolderBase]: 5176/8050 cut-off events. [2024-06-14 12:04:20,174 INFO L125 PetriNetUnfolderBase]: For 1845194/1845211 co-relation queries the response was YES. [2024-06-14 12:04:20,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94559 conditions, 8050 events. 5176/8050 cut-off events. For 1845194/1845211 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 47946 event pairs, 832 based on Foata normal form. 20/8063 useless extension candidates. Maximal degree in co-relation 94364. Up to 6685 conditions per place. [2024-06-14 12:04:20,327 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 523 selfloop transitions, 181 changer transitions 0/742 dead transitions. [2024-06-14 12:04:20,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 742 transitions, 13690 flow [2024-06-14 12:04:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-14 12:04:20,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42768595041322316 [2024-06-14 12:04:20,329 INFO L175 Difference]: Start difference. First operand has 426 places, 699 transitions, 11970 flow. Second operand 11 states and 207 transitions. [2024-06-14 12:04:20,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 742 transitions, 13690 flow [2024-06-14 12:04:24,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 742 transitions, 13198 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-14 12:04:24,521 INFO L231 Difference]: Finished difference. Result has 428 places, 701 transitions, 12002 flow [2024-06-14 12:04:24,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11478, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12002, PETRI_PLACES=428, PETRI_TRANSITIONS=701} [2024-06-14 12:04:24,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-14 12:04:24,522 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 701 transitions, 12002 flow [2024-06-14 12:04:24,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:24,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:24,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:24,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:04:24,523 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:24,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1515643606, now seen corresponding path program 1 times [2024-06-14 12:04:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:24,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957743053] [2024-06-14 12:04:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:24,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:26,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:26,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957743053] [2024-06-14 12:04:26,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957743053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:26,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:26,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:26,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053798980] [2024-06-14 12:04:26,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:26,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:26,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:26,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:26,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:04:26,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 701 transitions, 12002 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:26,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:26,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:04:26,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:28,738 INFO L124 PetriNetUnfolderBase]: 5775/8718 cut-off events. [2024-06-14 12:04:28,738 INFO L125 PetriNetUnfolderBase]: For 1983455/1983467 co-relation queries the response was YES. [2024-06-14 12:04:28,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97958 conditions, 8718 events. 5775/8718 cut-off events. For 1983455/1983467 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49638 event pairs, 991 based on Foata normal form. 36/8741 useless extension candidates. Maximal degree in co-relation 97762. Up to 7453 conditions per place. [2024-06-14 12:04:28,938 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 527 selfloop transitions, 198 changer transitions 0/753 dead transitions. [2024-06-14 12:04:28,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 753 transitions, 13808 flow [2024-06-14 12:04:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:04:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:04:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-14 12:04:28,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:04:28,940 INFO L175 Difference]: Start difference. First operand has 428 places, 701 transitions, 12002 flow. Second operand 12 states and 216 transitions. [2024-06-14 12:04:28,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 753 transitions, 13808 flow [2024-06-14 12:04:33,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 753 transitions, 13304 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-14 12:04:33,801 INFO L231 Difference]: Finished difference. Result has 431 places, 703 transitions, 12038 flow [2024-06-14 12:04:33,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11498, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12038, PETRI_PLACES=431, PETRI_TRANSITIONS=703} [2024-06-14 12:04:33,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 386 predicate places. [2024-06-14 12:04:33,802 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 703 transitions, 12038 flow [2024-06-14 12:04:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:33,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:33,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:33,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:04:33,802 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:33,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1522323610, now seen corresponding path program 13 times [2024-06-14 12:04:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829489459] [2024-06-14 12:04:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:35,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:35,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829489459] [2024-06-14 12:04:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829489459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:35,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087963599] [2024-06-14 12:04:35,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:35,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:35,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:35,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:35,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 703 transitions, 12038 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:35,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:35,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:35,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:37,894 INFO L124 PetriNetUnfolderBase]: 5282/8226 cut-off events. [2024-06-14 12:04:37,894 INFO L125 PetriNetUnfolderBase]: For 1889633/1889660 co-relation queries the response was YES. [2024-06-14 12:04:37,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96231 conditions, 8226 events. 5282/8226 cut-off events. For 1889633/1889660 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 49224 event pairs, 853 based on Foata normal form. 16/8221 useless extension candidates. Maximal degree in co-relation 96034. Up to 6656 conditions per place. [2024-06-14 12:04:38,038 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 525 selfloop transitions, 187 changer transitions 0/750 dead transitions. [2024-06-14 12:04:38,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 750 transitions, 13816 flow [2024-06-14 12:04:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-14 12:04:38,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-14 12:04:38,040 INFO L175 Difference]: Start difference. First operand has 431 places, 703 transitions, 12038 flow. Second operand 11 states and 211 transitions. [2024-06-14 12:04:38,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 750 transitions, 13816 flow [2024-06-14 12:04:42,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 750 transitions, 13318 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-06-14 12:04:42,135 INFO L231 Difference]: Finished difference. Result has 432 places, 705 transitions, 12082 flow [2024-06-14 12:04:42,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11540, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12082, PETRI_PLACES=432, PETRI_TRANSITIONS=705} [2024-06-14 12:04:42,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-14 12:04:42,136 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 705 transitions, 12082 flow [2024-06-14 12:04:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:42,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:42,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:42,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:04:42,136 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:42,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1693026040, now seen corresponding path program 14 times [2024-06-14 12:04:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12699115] [2024-06-14 12:04:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12699115] [2024-06-14 12:04:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12699115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:43,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:43,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923282195] [2024-06-14 12:04:43,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:43,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:43,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 705 transitions, 12082 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:43,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:43,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:43,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:46,167 INFO L124 PetriNetUnfolderBase]: 5307/8281 cut-off events. [2024-06-14 12:04:46,167 INFO L125 PetriNetUnfolderBase]: For 1928810/1928827 co-relation queries the response was YES. [2024-06-14 12:04:46,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96234 conditions, 8281 events. 5307/8281 cut-off events. For 1928810/1928827 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 49823 event pairs, 890 based on Foata normal form. 16/8290 useless extension candidates. Maximal degree in co-relation 96036. Up to 6839 conditions per place. [2024-06-14 12:04:46,322 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 533 selfloop transitions, 177 changer transitions 0/748 dead transitions. [2024-06-14 12:04:46,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 748 transitions, 13820 flow [2024-06-14 12:04:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-14 12:04:46,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:04:46,323 INFO L175 Difference]: Start difference. First operand has 432 places, 705 transitions, 12082 flow. Second operand 11 states and 209 transitions. [2024-06-14 12:04:46,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 748 transitions, 13820 flow [2024-06-14 12:04:50,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 748 transitions, 13298 flow, removed 76 selfloop flow, removed 9 redundant places. [2024-06-14 12:04:50,583 INFO L231 Difference]: Finished difference. Result has 434 places, 707 transitions, 12086 flow [2024-06-14 12:04:50,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11560, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12086, PETRI_PLACES=434, PETRI_TRANSITIONS=707} [2024-06-14 12:04:50,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 389 predicate places. [2024-06-14 12:04:50,584 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 707 transitions, 12086 flow [2024-06-14 12:04:50,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:50,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:50,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:50,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:04:50,584 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:50,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1693141360, now seen corresponding path program 15 times [2024-06-14 12:04:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:50,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237263220] [2024-06-14 12:04:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:52,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:52,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237263220] [2024-06-14 12:04:52,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237263220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:52,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:52,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:52,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214074025] [2024-06-14 12:04:52,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:52,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:52,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:04:52,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 707 transitions, 12086 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:52,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:52,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:04:52,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:54,649 INFO L124 PetriNetUnfolderBase]: 5316/8305 cut-off events. [2024-06-14 12:04:54,649 INFO L125 PetriNetUnfolderBase]: For 1967942/1967964 co-relation queries the response was YES. [2024-06-14 12:04:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96750 conditions, 8305 events. 5316/8305 cut-off events. For 1967942/1967964 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 50055 event pairs, 900 based on Foata normal form. 16/8307 useless extension candidates. Maximal degree in co-relation 96551. Up to 6524 conditions per place. [2024-06-14 12:04:54,799 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 524 selfloop transitions, 192 changer transitions 0/754 dead transitions. [2024-06-14 12:04:54,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 754 transitions, 13876 flow [2024-06-14 12:04:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-14 12:04:54,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-14 12:04:54,800 INFO L175 Difference]: Start difference. First operand has 434 places, 707 transitions, 12086 flow. Second operand 11 states and 212 transitions. [2024-06-14 12:04:54,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 754 transitions, 13876 flow [2024-06-14 12:04:59,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 754 transitions, 13370 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-06-14 12:04:59,529 INFO L231 Difference]: Finished difference. Result has 436 places, 709 transitions, 12140 flow [2024-06-14 12:04:59,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11580, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12140, PETRI_PLACES=436, PETRI_TRANSITIONS=709} [2024-06-14 12:04:59,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-14 12:04:59,530 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 709 transitions, 12140 flow [2024-06-14 12:04:59,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:59,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:59,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:04:59,531 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:59,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1621085065, now seen corresponding path program 2 times [2024-06-14 12:04:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:59,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016328472] [2024-06-14 12:04:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:59,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:00,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016328472] [2024-06-14 12:05:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016328472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:00,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623403821] [2024-06-14 12:05:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:00,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:05:00,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 709 transitions, 12140 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:00,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:00,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:05:00,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:03,662 INFO L124 PetriNetUnfolderBase]: 5568/8529 cut-off events. [2024-06-14 12:05:03,663 INFO L125 PetriNetUnfolderBase]: For 1988913/1988954 co-relation queries the response was YES. [2024-06-14 12:05:03,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96866 conditions, 8529 events. 5568/8529 cut-off events. For 1988913/1988954 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 50133 event pairs, 1472 based on Foata normal form. 13/8474 useless extension candidates. Maximal degree in co-relation 96666. Up to 8054 conditions per place. [2024-06-14 12:05:03,805 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 634 selfloop transitions, 31 changer transitions 0/727 dead transitions. [2024-06-14 12:05:03,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 727 transitions, 13530 flow [2024-06-14 12:05:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:05:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-14 12:05:03,806 INFO L175 Difference]: Start difference. First operand has 436 places, 709 transitions, 12140 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:05:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 727 transitions, 13530 flow [2024-06-14 12:05:08,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 727 transitions, 12960 flow, removed 95 selfloop flow, removed 9 redundant places. [2024-06-14 12:05:08,327 INFO L231 Difference]: Finished difference. Result has 435 places, 709 transitions, 11638 flow [2024-06-14 12:05:08,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11570, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11638, PETRI_PLACES=435, PETRI_TRANSITIONS=709} [2024-06-14 12:05:08,328 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 390 predicate places. [2024-06-14 12:05:08,328 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 709 transitions, 11638 flow [2024-06-14 12:05:08,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:08,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:08,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:08,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:05:08,328 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:08,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1676469631, now seen corresponding path program 1 times [2024-06-14 12:05:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:08,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104453873] [2024-06-14 12:05:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:09,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:09,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104453873] [2024-06-14 12:05:09,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104453873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:09,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:09,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:09,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448856550] [2024-06-14 12:05:09,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:09,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:09,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:09,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:09,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:05:09,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 709 transitions, 11638 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:09,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:09,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:05:09,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:12,431 INFO L124 PetriNetUnfolderBase]: 5578/8543 cut-off events. [2024-06-14 12:05:12,431 INFO L125 PetriNetUnfolderBase]: For 2007563/2007604 co-relation queries the response was YES. [2024-06-14 12:05:12,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95869 conditions, 8543 events. 5578/8543 cut-off events. For 2007563/2007604 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 50257 event pairs, 1473 based on Foata normal form. 14/8489 useless extension candidates. Maximal degree in co-relation 95668. Up to 8027 conditions per place. [2024-06-14 12:05:12,592 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 628 selfloop transitions, 47 changer transitions 0/737 dead transitions. [2024-06-14 12:05:12,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 737 transitions, 13400 flow [2024-06-14 12:05:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:05:12,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 12:05:12,594 INFO L175 Difference]: Start difference. First operand has 435 places, 709 transitions, 11638 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:05:12,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 737 transitions, 13400 flow [2024-06-14 12:05:16,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 737 transitions, 13338 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:16,723 INFO L231 Difference]: Finished difference. Result has 439 places, 715 transitions, 11806 flow [2024-06-14 12:05:16,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11576, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11806, PETRI_PLACES=439, PETRI_TRANSITIONS=715} [2024-06-14 12:05:16,724 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-14 12:05:16,724 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 715 transitions, 11806 flow [2024-06-14 12:05:16,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:16,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:16,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:05:16,725 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:16,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1621081500, now seen corresponding path program 3 times [2024-06-14 12:05:16,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:16,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827361264] [2024-06-14 12:05:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:16,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:17,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:17,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827361264] [2024-06-14 12:05:17,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827361264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:17,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:17,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369412916] [2024-06-14 12:05:17,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:17,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:17,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:05:17,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 715 transitions, 11806 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:17,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:17,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:05:17,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:20,741 INFO L124 PetriNetUnfolderBase]: 5587/8552 cut-off events. [2024-06-14 12:05:20,741 INFO L125 PetriNetUnfolderBase]: For 2042955/2042992 co-relation queries the response was YES. [2024-06-14 12:05:20,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96661 conditions, 8552 events. 5587/8552 cut-off events. For 2042955/2042992 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 50178 event pairs, 1009 based on Foata normal form. 14/8498 useless extension candidates. Maximal degree in co-relation 96459. Up to 7832 conditions per place. [2024-06-14 12:05:20,909 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 562 selfloop transitions, 124 changer transitions 0/748 dead transitions. [2024-06-14 12:05:20,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 748 transitions, 14030 flow [2024-06-14 12:05:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:05:20,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-14 12:05:20,911 INFO L175 Difference]: Start difference. First operand has 439 places, 715 transitions, 11806 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:05:20,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 748 transitions, 14030 flow [2024-06-14 12:05:25,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 748 transitions, 13897 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:25,921 INFO L231 Difference]: Finished difference. Result has 443 places, 720 transitions, 12007 flow [2024-06-14 12:05:25,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11673, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12007, PETRI_PLACES=443, PETRI_TRANSITIONS=720} [2024-06-14 12:05:25,922 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-14 12:05:25,922 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 720 transitions, 12007 flow [2024-06-14 12:05:25,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:25,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:25,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:25,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:05:25,923 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:25,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1621094520, now seen corresponding path program 4 times [2024-06-14 12:05:25,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:25,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369889309] [2024-06-14 12:05:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:25,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369889309] [2024-06-14 12:05:27,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369889309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:27,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:27,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42880828] [2024-06-14 12:05:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:27,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:27,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:05:27,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 720 transitions, 12007 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:27,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:27,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:05:27,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:30,036 INFO L124 PetriNetUnfolderBase]: 5581/8543 cut-off events. [2024-06-14 12:05:30,036 INFO L125 PetriNetUnfolderBase]: For 2064173/2064210 co-relation queries the response was YES. [2024-06-14 12:05:30,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96775 conditions, 8543 events. 5581/8543 cut-off events. For 2064173/2064210 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 50093 event pairs, 1008 based on Foata normal form. 14/8489 useless extension candidates. Maximal degree in co-relation 96572. Up to 7827 conditions per place. [2024-06-14 12:05:30,191 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 555 selfloop transitions, 129 changer transitions 0/746 dead transitions. [2024-06-14 12:05:30,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 746 transitions, 13921 flow [2024-06-14 12:05:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:05:30,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 12:05:30,193 INFO L175 Difference]: Start difference. First operand has 443 places, 720 transitions, 12007 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:05:30,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 746 transitions, 13921 flow [2024-06-14 12:05:35,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 746 transitions, 13600 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:35,273 INFO L231 Difference]: Finished difference. Result has 446 places, 720 transitions, 11952 flow [2024-06-14 12:05:35,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11686, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11952, PETRI_PLACES=446, PETRI_TRANSITIONS=720} [2024-06-14 12:05:35,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 401 predicate places. [2024-06-14 12:05:35,273 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 720 transitions, 11952 flow [2024-06-14 12:05:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:35,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:35,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:35,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:05:35,274 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:35,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash 532271454, now seen corresponding path program 16 times [2024-06-14 12:05:35,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:35,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692190063] [2024-06-14 12:05:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:36,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692190063] [2024-06-14 12:05:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692190063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:05:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258197506] [2024-06-14 12:05:36,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:36,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:05:36,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:05:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:05:36,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:05:36,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 720 transitions, 11952 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:36,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:36,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:05:36,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:39,935 INFO L124 PetriNetUnfolderBase]: 5389/8406 cut-off events. [2024-06-14 12:05:39,936 INFO L125 PetriNetUnfolderBase]: For 2227226/2227257 co-relation queries the response was YES. [2024-06-14 12:05:40,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99396 conditions, 8406 events. 5389/8406 cut-off events. For 2227226/2227257 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 50813 event pairs, 1001 based on Foata normal form. 15/8377 useless extension candidates. Maximal degree in co-relation 99192. Up to 7200 conditions per place. [2024-06-14 12:05:40,086 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 610 selfloop transitions, 112 changer transitions 0/760 dead transitions. [2024-06-14 12:05:40,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 760 transitions, 13702 flow [2024-06-14 12:05:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 12:05:40,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:05:40,087 INFO L175 Difference]: Start difference. First operand has 446 places, 720 transitions, 11952 flow. Second operand 10 states and 180 transitions. [2024-06-14 12:05:40,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 760 transitions, 13702 flow [2024-06-14 12:05:44,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 760 transitions, 13456 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:44,247 INFO L231 Difference]: Finished difference. Result has 449 places, 722 transitions, 12127 flow [2024-06-14 12:05:44,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11706, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12127, PETRI_PLACES=449, PETRI_TRANSITIONS=722} [2024-06-14 12:05:44,248 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-14 12:05:44,248 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 722 transitions, 12127 flow [2024-06-14 12:05:44,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:44,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:44,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:44,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:05:44,249 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:44,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash 590363904, now seen corresponding path program 17 times [2024-06-14 12:05:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512244637] [2024-06-14 12:05:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:46,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512244637] [2024-06-14 12:05:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512244637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:46,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:46,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:05:46,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352191756] [2024-06-14 12:05:46,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:46,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:05:46,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:05:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:05:46,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:05:46,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 722 transitions, 12127 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:46,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:46,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:05:46,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:49,073 INFO L124 PetriNetUnfolderBase]: 5447/8517 cut-off events. [2024-06-14 12:05:49,073 INFO L125 PetriNetUnfolderBase]: For 2340139/2340168 co-relation queries the response was YES. [2024-06-14 12:05:49,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103659 conditions, 8517 events. 5447/8517 cut-off events. For 2340139/2340168 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 52003 event pairs, 1129 based on Foata normal form. 9/8477 useless extension candidates. Maximal degree in co-relation 103454. Up to 6777 conditions per place. [2024-06-14 12:05:49,230 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 538 selfloop transitions, 190 changer transitions 0/766 dead transitions. [2024-06-14 12:05:49,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 766 transitions, 14471 flow [2024-06-14 12:05:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:05:49,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 12:05:49,232 INFO L175 Difference]: Start difference. First operand has 449 places, 722 transitions, 12127 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:05:49,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 766 transitions, 14471 flow [2024-06-14 12:05:54,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 766 transitions, 14056 flow, removed 106 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:54,558 INFO L231 Difference]: Finished difference. Result has 451 places, 726 transitions, 12468 flow [2024-06-14 12:05:54,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11748, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12468, PETRI_PLACES=451, PETRI_TRANSITIONS=726} [2024-06-14 12:05:54,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-14 12:05:54,559 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 726 transitions, 12468 flow [2024-06-14 12:05:54,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:54,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:54,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:54,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:05:54,560 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:54,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:54,561 INFO L85 PathProgramCache]: Analyzing trace with hash -167189412, now seen corresponding path program 18 times [2024-06-14 12:05:54,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:54,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169692261] [2024-06-14 12:05:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:54,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:56,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169692261] [2024-06-14 12:05:56,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169692261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:56,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:56,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:05:56,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132151394] [2024-06-14 12:05:56,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:05:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:05:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:05:56,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:05:56,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 726 transitions, 12468 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:56,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:56,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:05:56,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:59,448 INFO L124 PetriNetUnfolderBase]: 5460/8556 cut-off events. [2024-06-14 12:05:59,448 INFO L125 PetriNetUnfolderBase]: For 2256877/2256906 co-relation queries the response was YES. [2024-06-14 12:05:59,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102500 conditions, 8556 events. 5460/8556 cut-off events. For 2256877/2256906 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 52503 event pairs, 1176 based on Foata normal form. 13/8520 useless extension candidates. Maximal degree in co-relation 102294. Up to 7255 conditions per place. [2024-06-14 12:05:59,598 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 552 selfloop transitions, 176 changer transitions 0/766 dead transitions. [2024-06-14 12:05:59,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 766 transitions, 14238 flow [2024-06-14 12:05:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:05:59,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-14 12:05:59,599 INFO L175 Difference]: Start difference. First operand has 451 places, 726 transitions, 12468 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:05:59,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 766 transitions, 14238 flow [2024-06-14 12:06:04,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 766 transitions, 13852 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:04,274 INFO L231 Difference]: Finished difference. Result has 454 places, 728 transitions, 12630 flow [2024-06-14 12:06:04,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12102, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12630, PETRI_PLACES=454, PETRI_TRANSITIONS=728} [2024-06-14 12:06:04,275 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 409 predicate places. [2024-06-14 12:06:04,275 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 728 transitions, 12630 flow [2024-06-14 12:06:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:04,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:04,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:04,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:06:04,276 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:04,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:04,276 INFO L85 PathProgramCache]: Analyzing trace with hash -167194062, now seen corresponding path program 19 times [2024-06-14 12:06:04,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516336530] [2024-06-14 12:06:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:05,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516336530] [2024-06-14 12:06:05,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516336530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:05,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:05,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:06:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169693251] [2024-06-14 12:06:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:06:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:06:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:06:05,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:06:05,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 728 transitions, 12630 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:05,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:05,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:06:05,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:09,020 INFO L124 PetriNetUnfolderBase]: 5452/8540 cut-off events. [2024-06-14 12:06:09,020 INFO L125 PetriNetUnfolderBase]: For 2195876/2195905 co-relation queries the response was YES. [2024-06-14 12:06:09,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101558 conditions, 8540 events. 5452/8540 cut-off events. For 2195876/2195905 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 52333 event pairs, 1138 based on Foata normal form. 9/8500 useless extension candidates. Maximal degree in co-relation 101351. Up to 7067 conditions per place. [2024-06-14 12:06:09,169 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 548 selfloop transitions, 180 changer transitions 0/766 dead transitions. [2024-06-14 12:06:09,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 766 transitions, 14232 flow [2024-06-14 12:06:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:06:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:06:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 12:06:09,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 12:06:09,170 INFO L175 Difference]: Start difference. First operand has 454 places, 728 transitions, 12630 flow. Second operand 10 states and 184 transitions. [2024-06-14 12:06:09,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 766 transitions, 14232 flow